Guides

### MP Board Class 10 Maths Syllabus

MP Board of Secondary Education (MPBSE) has been proactive in designing the syllabus of Class 10 Mathematics subject each year to make sure the students get a better understanding of the subject and...

### Uttarakhand Board Class 12 Biology Syllabus

Uttarakhand Board of School Education (UKBSE) has prepared a detailed syllabus for Class 12 Biology exam of 2021-22. The syllabus is comprehensive and has been designed in such a manner that it...

### Uttarakhand Board Class 12 Maths Syllabus

Uttarakhand Board of School Education (UKBSE) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the future...

### Uttarakhand Board Class 12 Chemistry Syllabus

Uttarakhand Board of School Education (UKBSE) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in...

### Uttarakhand Board Class 12 Physics Syllabus

The Uttarakhand Board of School Education (UKBSE) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career....

### Uttarakhand Board Class 11 Biology Syllabus

Uttarakhand Board of School Education (UKBSE) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Uttarakhand Board Class 11 Maths Syllabus

Uttarakhand Board of School Education (UKBSE) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a...

### Uttarakhand Board Class 11 Chemistry Syllabus

Uttarakhand Board of School Education (UKBSE) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is a must that students closely analyze the syllabus...

### Uttarakhand Board Class 11 Physics Syllabus

Uttarakhand Board of School Education (UKBSE) has prescribed an updated syllabus which has undergone drastic changes keeping in mind the changing times. UKBSE has been proactive in structuring the...

### Uttarakhand Board Class 10 Maths Syllabus

Uttarakhand Board of School Education (UKBSE) has been proactive in designing the syllabus of Class 10 Mathematics subject each year to make sure the students get a better understanding of the...

### Uttarakhand Board Class 10 Science Syllabus

Uttarakhand Board of School Education (UKBSE) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career. Sincere and...

### Chhattisgarh Board Class 12 Biology Syllabus

CGBSE (Chhattisgarh Board of Secondary Education) has prepared a detailed syllabus for Class 12 Biology exam of 2021-22. The syllabus is comprehensive and has been designed in such a manner that it...

### Chhattisgarh Board Class 12 Maths Syllabus

CGBSE (Chhattisgarh Board of Secondary Education) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the...

### Chhattisgarh Board Class 12 Chemistry Syllabus

Chhattisgarh Board of Secondary Education (CGBSE) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in...

### Chhattisgarh Board Class 12 Physics Syllabus

Chhattisgarh Board of Secondary Education (CGBSE) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career....

### Chhattisgarh Board Class 11 Biology Syllabus

CGBSE (Chhattisgarh Board of Secondary Education) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Chhattisgarh Board Class 11 Maths Syllabus

Chhattisgarh Board of Secondary Education (CGBSE) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a...

### Chhattisgarh Board Class 11 Chemistry Syllabus

Chhattisgarh Board of Secondary Education (CGBSE) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is important that students closely analyze the...

### Chhattisgarh Board Class 11 Physics

Chhattisgarh Board of Secondary Education (CGBSE) has been undergoing drastic changes keeping in mind the changing times. The syllabus prescribed by the board has been in line with the modern...

### Chhattisgarh Board Class 10 Science Syllabus

Chhattisgarh Board of Secondary Education (CGBSE) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career....

### Chhattisgarh Board Class 10 Maths

Chhattisgarh Board of Secondary Education (CGBSE) has been making drastic changes in the syllabus of various subjects keeping in mind the changing times. CGBSE has been proactive in structuring the...

### Bihar Board Class 12 Biology Syllabus

Bihar School Examination Board (BSEB) has prepared a detailed syllabus for Class 12 Biology exam of 2021-22. The syllabus is comprehensive and has been designed in such a manner that it helps...

### Bihar Board Class 12 Maths Syllabus

Bihar School Examination Board (BSEB) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the future academic...

### Bihar Board Class 12 Chemistry Syllabus

Bihar School Examination Board (BSEB) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in understanding the...

### Bihar Board Class 12 Physics Syllabus

Bihar School Examination Board (BSEB) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career. Sincere and...

### Bihar Board Class 11 Biology Syllabus

Bihar School Examination Board (BSEB) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students analyze and clarify the doubts regarding...

### Bihar Board Class 11 Maths Syllabus

Bihar School Examination Board (BSEB) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a practical...

### Bihar Board Class 11 Chemistry Syllabus

Bihar School Examination Board (BSEB) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is a must that students study and analyze the syllabus before...

### Bihar Board Class 11 Physics Syllabus

Bihar School Examination Board (BSEB) has been regularly updating the syllabus of all the subjects in Class 11 as it is considered a crucial phase in a student’s academic career. Sincere and...

### Bihar Board Class 10 Science Syllabus

Bihar School Examination Board (BSEB) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career. Sincere and...

### Bihar Board Class 10 Maths Syllabus

Bihar School Examination Board (BSEB) has been proactive in designing the syllabus of Class 10 Mathematics subject each year to make sure the students get a better understanding of the subject and...

### Haryana Board Class 12 Biology Syllabus

Haryana Board of School Education (HBSE Board) has prepared a detailed syllabus for Class 12 Biology exam of 2021-22. The syllabus is comprehensive and has been designed in such a manner that it...

### Haryana Board Class 12 Maths Syllabus

HBSE (Haryana Board of School Education) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the future...

### Haryana Board Class 12 Chemistry Syllabus

Haryana Board of School Education (HBSE) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in...

### Haryana Board Class 12 Physics Syllabus

Haryana Board of School Education (HBSE) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career. Sincere and...

### Haryana Board Class 11 Biology Syllabus

Haryana Board of Secondary Education (the HBSE) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Haryana Board Class 11 Maths Syllabus

Haryana Board of School Education (HBSE) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a...

### Haryana Board Class 11 Chemistry

Haryana Board of School Education (HBSE) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is a must that students closely analyze the syllabus before...

### Haryana Board Class 10 Science Syllabus

Haryana Board of School Education (HBSE) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career. Sincere and...

### Rajasthan Board Class 12 Maths Syllabus

The RBSE (Rajasthan Board of Secondary Education) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the...

### Rajasthan Board Class 11 Maths Syllabus

Rajasthan Board (RBSE) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a practical exam or viva....

### Rajasthan Board Class 12 Physics Syllabus

The Rajasthan Board of Secondary Education (RBSE) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career....

### Rajasthan Board Class 12 Chemistry Syllabus

Rajasthan Board of Secondary Education (RBSE) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in...

### Rajasthan Board Class 11 Biology Syllabus

Rajasthan Board of Secondary Education (the RBSE) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Rajasthan Board Class 11 Chemistry Syllabus

Jharkhand Board (the Jharkhand Academic Council) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Rajasthan Board Class 11 Physics Syllabus

Rajasthan Board of Secondary Education (RBSE) was established in the year 1957. The syllabus prescribed by the board has undergone drastic changes keeping in mind the changing times. RBSE has...

### Rajasthan Board Class 10 Science Syllabus

The RBSE (Rajasthan Board of Secondary Education) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student's academic career. Sincere...

### Rajasthan Board Class 10 Maths Syllabus

Rajasthan Board of Secondary Education (RBSE) was established in the year 1957. The syllabus prescribed by the board has undergone drastic changes keeping in mind the changing times. RBSE has been...

### Jharkhand Board Class 12 Biology Syllabus

The Jharkhand Academic Council (JAC Board) has prepared a detailed syllabus for Class 12 Biology exam of 2021-22. The syllabus is comprehensive and has been designed in such a manner that it helps...

### Jharkhand Board Class 12 Maths Syllabus

The JAC Board (Jharkhand Academic Council) has come up with a restructured and comprehensive syllabus for Class 12 Maths. The syllabus of the subject has been designed keeping in mind the future...

### Jharkhand Board Class 12 Chemistry Syllabus

The Jharkhand Academic Council (JAC Board) has prepared a detailed syllabus for Class 12 Chemistry for the board exam of 2021-22. The new syllabus aims to help students become better in...

### Jharkhand Board Class 12 Physics Syllabus

The Jharkhand Academic Council (JAC Board) has been regularly updating the syllabus of all the subjects in Class 12 as it is considered the turning point in a student’s academic career. Sincere and...

### Jharkhand Board Class 11 Maths Syllabus

Jharkhand Board (Jharkhand Academic Council) designs the detailed syllabus of Class 11 Mathematics subject. The board conducts an annual exam for this subject consisting of a theory paper and a...

### Jharkhand Board Class 11 Biology Syllabus

Jharkhand Board (the Jharkhand Academic Council) has prepared a comprehensive syllabus for Class 11 Biology for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Jharkhand Board Class 11 Chemistry Syllabus

Jharkhand Board (the Jharkhand Academic Council) has prepared a comprehensive syllabus for Class 11 Chemistry for the board exam of 2021-22. It is a must that students study and analyze the syllabus...

### Jharkhand Board Class 10 Maths Syllabus

The Jharkhand Academic Council (JAC Board) has been proactive in designing the syllabus of Class 10 Mathematics subject each year to make sure the students get a better understanding of the subject...

### Jharkhand Board Class 11 Physics Syllabus

The Jharkhand Academic Council (JAC Board) has been regularly updating the syllabus of all the subjects in Class 11 as it is considered a crucial phase in a student's academic career. Sincere and...

### Jharkhand Board Class 10 Science Syllabus

The Jharkhand Academic Council (JAC Board) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career. Sincere and...

### How to prepare for a Viva

How to prepare for a Viva : We all agree that exams can be scary and stressful for most of us, especially the external Viva examinations!  To help ease your stress, we at Noon, wish to take you...

### Diagonals AC and BD of a trapezium ABCD with AB intersect each other at the point Using a similarity criterion for two triangles, show that

Solution: In $\Delta \mathrm{DOC}$ and $\triangle \mathrm{BOA}$ $\mathrm{AB} \| \mathrm{CD}$, thus alternate interior angles will be equal, $\therefore \angle \mathrm{CDO}=\angle \mathrm{ABO}$...

### .If and be the inductance and resistance respectively then the dimensions of will be i) ii) iii) iv)

Correct option is A $\mathrm{M}^{\circ} \mathrm{L} \mathrm{T}$ We know that: Dimensional formula of $\mathrm{L}=\mathrm{ML}^{2} \mathrm{~T}^{-2} \mathrm{~A}^{-2}$ Dimensional formula for...

Correct option is D $\mathrm{P}^{1-\mathrm{T}^{7}}=$ constant From the first law of thermodynamics, $d U=d Q+d W$ But for adiabatic process, $\mathrm{dQ}=0$ $$\begin{array}{l}... read more Solution:- \int \cos 2 x \cos 4 x \cos 6 x d x=\int \cos 2 x\left[\frac{1}{2}\{\cos (4 x+6 x)+\cos (4 x-6 x)\}\right] d x =\frac{1}{2} \int\{\cos 2 x \cos 10 x+\cos 2 x \cos (-2 x)\} d x We know... read more ### Consider binary operation on defined as . Choose the correct answer. both associative and commutative? (B) Is commutative but not associative? (C) Is associative but not commutative? (D) Is neither commutative nor associative? Solution: A binary operation * on N defined as a * b=a^{3}+b^{3}, Also, a * b=a^{3}+b^{3}=b^{3}+a^{3}=b^{*} a The operation { }^{*} is commutative. Again, (a * b)^{*}... read more ### If and are unit vectors such that , find the value of . Solution: Consider the given vectors, Given, \vec{a}+\vec{b}+\vec{c}=\overrightarrow{0}. So, And,$$ \begin{array}{l} \vec{c} \cdot(\vec{a}+\vec{b}+\vec{c})=\vec{c} \cdot \overrightarrow{0} \\...

Solution: Let us take, $9-4 x^{2}=t$ We get, $-8 \mathrm{x} \mathrm{dx}=\mathrm{dt}$ Now take, $\int \frac{x}{9-4 x^{2}} d x$ https://byjus.com $B B Y J U^{\prime} S$ So, $$=\frac{-1}{8}... read more Solution: Given$$ \sin (a x+b) \cos (a x+b) $$On integrating the above function, we get$$ \sin (a x+b) \cos (a x+b)=\frac{2 \sin (a x+b) \cos (a x+b)}{2} $$We obtain,$$ =\frac{\sin 2(a x+b)}{2}...

### Which one of the following hologens is the strongest oxidising agent? (A) I (B) (C) F (D)

Correct option is C fluorine Florine is the most powerful oxidizing agent because it is the most electronegative element. Electronegative elements have the property to remove electrons form the...

### Solve the following linear programming problem : Maximize

subject to the constraints $x+y \leq 4$ $$x \geq 0, y \geq 0 \text {. }$$ $$x+y \leq 4$$ Hence, $\mathrm{z}$ is maximum at $(0,4)$ and max value is 16

### Describe various Cannabinoid drugs.

Solution: A type of chemical in marijuana that causes drug-like effects including the central nervous system and the immune system.  Main active cannabinoid in marijuana is...

Answer Given equations: r¯=(ı^+ȷ^)+λ(2ı^-ȷ^+k^) \overline{\mathrm{r}}=(\hat{\imath}+\hat{\jmath})+\lambda(2 \hat{\imath}-\hat{\jmath}+\hat{\mathrm{k}})...

### Find the angle between each of the following pairs of lines:

To find – Angle between the two pair of lines Direction ratios of L1 = (1,0,3) Direction ratios of L2 = (-1,1,1) Tip – If (a,b,c) be the direction ratios of the first line and (a’,b’,c’) be that of...

### Differentiate between Homologous and Analogous organs.

Solution:   HOMOLOGOUS ORGANS ANALOGOUS ORGANS 1. They differ morphologically. 1. They show a superficial resemblance. 2. They have a similar internal structure. 2. Their internal structure is...

### General formula of Alkene is

correct answer is option Alkenes are defined as either branched or unbranched hydrocarbons that possess at least one carbon–carbon double bond (CC) and have a general formula of CnH2n

### Diode is used as- (A) An amplifier (B) An 0scillator (C) A modulator (D) A rectifier

The correct option is (D) rectifier. Diode is a device which allows to pass a current only when it is forward biased. ... Hence it can be used as a rectifier.

### Draw a simplified model of the Phosphorus Cycle in a terrestrial ecosystem.

The biological membrane, nucleic acids, and cellular energy transmission system all contain phosphorus. Detritus is leaf litter and other organic debris that has been mixed with soil to form humus....

### Define Coupling and Repulsion.

Solution: Coupling is the linkage of two dominant or two recessive alleles. Repulsion shows that dominant alleles are linked with recessive alleles.

Solution:

### Define Coupling and Repulsion.

Solution: Coupling is the linkage of two dominant or two recessive alleles. Repulsion shows that dominant alleles are linked with recessive alleles.

Solution:

### find the value of n, for the following

To find: the value of n. We can write it as 3n2 + 7 × n - 370 = 0 Therefore n = 37/3, 10 Rejecting 37/3 we get n = 10

### In any ΔABC, prove that a

Similarly, b = 2R sinB and c = 2R sinC From Right hand side,

Left hand side,

### Which term of the AP 64, 60, 56, 52, 48, …. is 0?

To Find: we need to find n when an = 0 Given: The series is 64, 60, 56, 52, 48, ... and an= 0 a1=64, a2= 60 and d=60–64 = –4 (Where a=a1 is first term, a2 is second term, an is nth term and d is...

### Find the first 5 terms of the sequence, defined by

To Find: First five terms of a given sequence. Condition: n ≥ 2 First five terms of a given sequence are  -1,-12,-16,-124,-1120

### The length of the major axis of an ellipse is     units, and its foci are . Find the equation of the ellipse.

Let the equation of the required ellipse be Given: Length of Major Axis = $20$ units …(i) We know that, Length of Major Axis = $2a$ …(ii) ∴ From eq. (i) and (ii), we get...

### Opium is obtained from (A)Papaver somniferum (B) Frythroxylum coca (C) Cannabis Sativa (D) Atropa belladonna

(A)Papaver somniferum Opium contains two major groups of alkaloids. Morphin is the most common alkaloid found in opium. It is a narcotic drug derived from opium poppy seed pods. Diacetylmorphine is...

### Find the (iii) coordinates of the foci, (iv) eccentricity

Given: $\frac{{{x}^{2}}}{49}+\frac{{{y}^{2}}}{36}=1$…(i) Since, $49\text{ }>\text{ }36$ So, above equation is of the form, $\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1$ …(ii)...

### Find the (iii) coordinates of the foci, (iv) eccentricity

Given: $\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1$…(i) Since, $25>9$ So, above equation is of the form, $\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1$…(ii)...

### In an equilateral triangle with side a, prove that area =

Answer: We know that the altitude of an equilateral triangle bisects the side on which it stands and forms right angled triangles with the remaining sides. ABC is an...

### In a single throw of two dice, find the probability of (ii)getting a doublet of odd numbers (iii)getting the sum as a prime number

Answer : (i) We know that, Probability of occurrence of an event (2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6),Outcomes are (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (3, 1), (3, 2), (3, 3),...

### Q4) Renin is secreted by the cells of _______. 1. JG apparatus 2. Collecting tubule 3. Collecting duct 4. PCT

Correct option- 1 Explanation: Renin is secreted by the JG apparatus found in the afferent arteriole. The secretion is mediated by the fusion of renin-containing granules with the luminal membrane...

### What is the role of pyridine in the acylation reaction of amines?

Solution: The activating effect of –NH2 group can be controlled by protecting the -NH2 group by acetylation with acetic anhydride in presence of pyridine and then carrying out the desired...

### Give the structure of ‘A’ in the following reaction.

Solution: The reaction involves the diazotization of the amine group.

### A vehicle travels half the distance L with speed V1 and the other half with speed V2, then its average speed is a) (V1+V2)/2 b) (2V1+V2)/(V1+V2) c) (2V1V2)/(V1+V2) d) L(V1+V2)/V1V2

The correct answer is c) (2V1V2)/(V1+V2)

### In one-dimensional motion, instantaneous speed v satisfies 0≤v

a) the displacement in time T must always take non-negative values b) the displacement x in time T satisfies: v0T<x<v0T c) the acceleration is always a non-negative number d) the motion has no...

### A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct? a) x<0, v<0, a>0 b) x>0, v<0, a<0 c) x>0, v<0, a>0 d) x>0, v>0, a<0

The correct answer is a) x<0, v<0, a<0 The value of x and v becomes negative as the lift is moving from the 8th floor to the 4th floor whereas acceleration is acting upwards and stays...

### The correct decreasing order of basic strength of the following species is _______. H2O, NH3, OH–, NH2– (i) NH2– > OH – > NH3 > H2O (ii) OH– > NH2– > H2O > NH3 (iii) NH3 > H2O > NH2– > OH– (iv) H2O > NH3> OH– > NH2–

Solution: Option (i) is the answer. Reason: NH3​ is more basic than H2​O, therefore NH2−​ (Conjugate base of weak acid NH3​) is a stronger base than OH−.

### The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ____. (i) excess H2/Pt (ii) NaOH/Br2 (iii) NaBH4/methanol (iv) LiAlH4/ether

Solution: Option (ii) is the answer. Reason: By Hoffmann bromamide degradation reaction, the amine formed contains one carbon less than that present in the amide.

### Q72) Select the CORRECT pair A) Adaptive Radiation – Darwin’s Finches B) Connecting Link – Sewall – Wright effect C) Genetic drift – Peppered moth D) Industrial Melanism – Archeopteryx

Correct option:  A Explanation: Adaptive Radiation – Darwin’s Finches: Darwin’s finches are a classic example of adaptive radiation. The process in which one species gives rise to multiple species...

### Q53) One of the following pair of animals is an example of commensalism A) Sacculina – crab B) Plasmodium – Anopheles C) Golden Jackal – Tiger D) Ascaris – Man

Correct option:  C Explanation: Golden Jackal – Tiger is the example of commensalism.  Commensalism  is a long-term biological interaction in which member of one species gain benefit and the second...

### Q51) Forceful muscular contractions of uterine wall is involved in A) Implantation B) Lactation C) Micturition D) Parturition

Correct option:  D Explanation: Parturition means child birth. It is the process of bringing forth a child from the womb. As the baby leaves the uterus, the uterine walls get approximated closely....

### Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of (1) G1 phase (2) S phase (3) G2 phase (4) M phase

Correct option:(4)M phase Solution: ●Some dividing cells exit the cell cycle and enter vegetative inactive stage, called quiescent stage (G0​). ●Process occurs at the end of M−phase and beginning of...

### According to Robert May, the global species diversity is about (1) 20 million (2) 50 million (3) 7 million (4) 1.5 million

Correct option:(3)7 million Solution: According to Robert May, global species diversity is about 7 million.

### correct option. Column-I Column-II (a) Organ of Corti (i) Connects middle ear and pharynx (b) Cochlea (ii) Coiled part of the labyrinth (c) Eustachian tube (iii) Attached to the oval window (d) Stapes (iv) Located on the basilar membrane

Correct option:(2)Cochlea (ii) Coiled part of the labyrinth Solution: ●Organ of Corti - Organ of the inner ear located within the cochlea on the basilar membrane. ●It contributes to the audition....

### Identify the basic amino acid from the following. (1) Glutamic Acid (2) Lysine (3) Valine (4) Tyrosine

Correct option:(2)Lysine Solution: ●Glutamic Acid - is an acidic amino acid. ●Lysine - is a basic amino acid. ●Valine - is an aliphatic amino acid. ●Tyrosine - is an aromatic amino acid.

### Which of the following is not an attribute of a population? (1) Natality (2) Mortality (3) Species interaction (4) Sex ratio

Correct option:(3)Species interaction Solution: ●Natality, Mortality and sex ratio are attributes of a population. ●Species interaction can be inter or intraspecific. ●Population forms the part of...

### Number of possible isomers for the complex [Co(en)2Cl2 ]Cl will be: (en = ethylene diamine)

(1) 3 (2) 4 (3) 2 (4) 1   Correct Answer: (1) 3 Explanation:

### Q 71. Which one of the following are analogous structures? Option A Gills of prawn and lungs of man Option B Thorns of Bougainvillea and tendrils of Cucurbita Option C Flippers of dolphin and legs of horse Option D Wings of bat and wings of pigeon

Correct Option: A Solution: Analogous structures are those whose basic structure is the same but have different functions. Gills of prawn and lungs of man are analogous structures

### In photosynthesis, the light-independent reactions take place at: (1) Stromal matrix (2) Thylakoid lumen (3) Photosystem – I (4) Photosystem-II

Correct option: In photosynthesis, the light-independent reactions take place at Stromal matrix Solution: The light independent reaction takes place in the stromal matrix. The light dependent...

### In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree

(1) X-linked dominant (2) Autosomal dominant (3) X-linked recessive (4) Autosomal recessive Correct option:  Solution: In the following human pedigree, the filled symbols represent the affected...

### Q 55. When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as: Option A Imbricate Option B Twisted Option C Valvate Option D Vexillary

Correct Option: A Solution: Imbricate is the condition when the margins of sepals or petals overlap one another without any particular direction. Like as in the Gulmohar.

### Match the following parts of a nephron with their function : (a) Descending limb (i) Reabsorption of of Henle’s loop salts only (b) Proximal (ii) Reabsorption of convoluted tubule water only (c) Ascending limb (iii) Conditional of Henle’s loop reabsorption of sodium ions and water (d) Distal convoluted (iv) Reabsorption of tubule ions, water and organic nutrients Select the correct option from the following : (1) (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii) (2) (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv) (3) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) (4) (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

The correct option is (3) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii). The explanation is as follows.

### The structure of isobutyl group in an organic compounds is:

Solution: Correct Option B The term 'iso' refers to the presence of one Methyl group on the second carbon of a normal chain branch. The 'Yl' suffix was previously used to denote one -H less than the...

### In which of the following both pairs have corrected combination?

1 Gaseous nutrient cycle Sulphur and phosphorus   Sedimentary nutrient cycle Carbon and nitrogen 2 Gaseous nutrient cycle Carbon and nitrogen   Sedimentary nutrient cycle Sulphur and phosphorus 3...

### The term ‘’linkage’’ was coined by (1) W. Sutton (2) T.H. Morgan (3) T. Boveri (4) G. Mende

Correct option:  The term ‘’linkage’’ was coined by  T.H. Morgan. Explanation for the correct option: The term” linkage” was coined by T.H Morgan. Sutton is known for his “chromosome is the basis of...

### Q 5. Which of the following shows coiled RNA strand and capsomeres? Option A Tobacco mosaic virus Option B Measles virus Option C Retrovirus Option D Polio virus

Correct Option: A Explanation: Coiled RNA strands and capsomeres are shown by the tobacco mosaic virus.

### 180. A typical fat molecules is made up of: (1) Three glycerol molecules and one fatty acid molecules (2) One glycerol and three fatty acid molecules (3) One glycerol and one fatty acid molecule (4) Three glycerol and three fatty acid molecules

Solution: (2) Fat is a triglyceride composed of three fatty acid molecules and one glycerol molecule.

### 179. A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in: (1) Aneuploidy (2) Polyploidy (3) Somaclonal variation (4) Polyteny

Solution: (2) Polyploidy cells have more than double the amount of chromosomes as haploid cells.

### 178. A river with an inflow of domestic sewage rich in organic waste may result in: (1) Drying of the river very soon due to algal bloom. (2) Increased population of aquatic food web organisms. (3) An increased production of fish due to biodegradable nutrients. (4) Death of fish due to lack of oxygen.

Solution: (4) The dissolved oxygen (DO) in a river with an input of home sewage rich in organic waste will be reduced, potentially resulting in fish death due to a lack of oxygen.

### 177. The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the: (1) Halophiles (2) Thermoacidophiles (3) Methanogens (4) Eubacteria

Solution: (3) Archaebacteria are the most primordial prokaryotes that initially appeared on Earth because they were able to live in the anaerobic hard environment of the time. Archaebacteria include...

### 176. Stems modified into flat green organs performing the functions of leaves are known as: (1) Cladodes (2) Phyllodes (3) Phylloclades (4) Scales

Solution: (3) Phylloclade is the alteration of the stem into flat green organs that execute the tasks of leaves, whereas phyllode is the modification of the petiole.

### 175. Which of the following guards the opening of hepatopancreatic duct into the duodenum? (1) Semilunar valve (2) Ileocaecal valve (3) Pyloric sphincter (4) Sphincter of Oddi

Solution: (4) The sphincter of Oddi protects the entry of the hepatopancreatic duct into the duodenum.

### 174. Specialized epidermal cells surrounding the guard cells are called: (1) Complementary cells (2) Subsidiary cells (3) Bulliform cells (4) Lenticels

Solution: (2) Both subsidiary cells and guard cells are modifications of epidermal cells, however guard cells have chloroplasts, whilst subsidiary cells do not.

### 173. Which of the following statements is not correct? (1) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. (2) Insects that consume pollen or nectar without bringing about pollination are called pollen nerctar ⁄ robbers. (3) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (4) Some reptiles have also been reported as pollinators in some plant species.

Solution: (1) A style can grow from more than one pollen tube of the same species. It's a common occurrence in nature.

### 172. Which of the following is not a characteristic feature during mitosis in somatic cells? (1) Spindle fibres (2) Disappearance of nucleolus (3) Chromosome movement (4) Synapsis

Solution: (4) Synapsis is the pairing of homologous chromosomes that takes place during meiosis but not in mitosis.

### 171. It is much easier for a small animal to run uphill than for a large animal, because: (1) It is easier to carry a small body weight. (2) Smaller animals have a higher metabolic rate. (3) Small animals have a lower O2 requirement (4) The efficiency of muscles in large animals is less than in the small animals.

Solution: (2) Smaller animals have a greater BMR, which is linked to long-term energy generation and muscle weariness.

### 170. In a testcross involving F1 dihybrid flies, more parental – type offspring were produced than the recombinant – type offspring. This indicates: (1) The two genes are located on two different chromosomes (2) Chromosomes failed to separate during meiosis (3) The two genes are linked and present on the same chromosome (4) Both of the characters are controlled by more than one gene

Solution: (3) When a plant genotype Aa Bb crosses with aabb, Independent Assortment produces four types of progeny in equal proportions. Aa Bb – gametes AB Ab aB ab Aa bb – Gametes ab ab ab ab...

### 169. Which of the following is wrongly matched in the given table? (1) Microbe Product Application Trichoderma polysporum Cyclosporin A Immunosuppressive drug (2) Microbe Product Application Monascus purpureus Statins Lowering of blood cholesterol (3) Microbe Product Application Streptococcus Streptokinase Removal of clot from blood vessel (4) Microbe Product Application Clostridium butylicum Lipase Removal of oil stains

Solution: (4) The bacterium Clostridium butylicum is used to make butyric acid. Lipase is produced by Candida lipolyticum.