Photosynthesis in Higher Plants

Observe the diagram and answer the following.
a. Which group of plants exhibits these two types of cells?

b. What is the first product of the C4 cycle?

c. Which enzyme is there in bundle sheath cells and mesophyll cells?

Solution: (a) Bundle sheath cells and mesophyll cells are characteristics of monocot plants. (b) Oxaloacectic acid (OAA) is the first stable compound produced in the C4 cycle. (c) PEP carboxylase,...

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In the figure given below, the lighter line (upper) indicates the action spectrum for photosynthesis and the black line (lower) indicates the absorption spectrum of chlorophyll a. Answer the following
a. What does the action spectrum indicate? How can we plot an action spectrum?

b. How can we derive an absorption spectrum for any substance?

Solution: a. The photosynthetic rate is indicated by the action spectrum. The measurement is oxygen release, which can be compared to the action spectrum by looking at the oxygen releases on the...

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Suppose Euphorbia and Maize are grown in the tropical area.
a. Which one of them do you think will be able to survive under such conditions?

b. Which one of them is more efficient in terms of photosynthetic activity?

c. What difference do you think are there in their leaf anatomy?

Solution: a. Maize is a C4 plant, while euphorbia is a CAM plant. Both are capable of surviving in tropical climates. b. Maize is a C4 plant, which means it has higher photosynthetic efficiency. c....

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A cyclic process is occurring in a C3 plant, which is light-dependent and needs O2. This process doesn’t produce energy rather it consumes energy.
a. Can you name the given process?

b. Is it essential for survival?

c. What are the end products of this process?

d. Where does it occur?

Solution: (a) Photorespiration, is a process that occurs in chloroplasts, mitochondria, and peroxisomes. (b) Photorespiration happens when there is an abundance of oxygen rather than carbon dioxide,...

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The entire process of photosynthesis consists of a number of reactions. Where in the cell does each of these take place?
a. Synthesis of ATP & NADPH __________________________

b. Photolysis of water __________________________

c. Fixation of CO2 __________________________

d. Synthesis of sugar molecule __________________________

e. Synthesis of starch __________________________

Solution: (a) occurs in the outer side of the thylakoid membrane (b) is conducted on the inner side of the thylakoid membrane (c) is performed in the stroma of the chloroplast (d) takes place in the...

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Suppose Euphorbia and Maize are grown in the tropical area.
a. Which one of them do you think will be able to survive under such conditions?

b. Which one of them is more efficient in terms of photosynthetic activity?

c. What difference do you think are there in their leaf anatomy?

Solution: a. Maize is a C4 plant, while euphorbia is a CAM plant. Both are capable of surviving in tropical climates. b. Maize is a C4 plant, which means it has higher photosynthetic efficiency. c....

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A cyclic process is occurring in a C3 plant, which is light-dependent and needs O2. This process doesn’t produce energy rather it consumes energy.
a. Can you name the given process?

b. Is it essential for survival?

c. What are the end products of this process?

d. Where does it occur?

Solution: (a) Photorespiration, is a process that occurs in chloroplasts, mitochondria, and peroxisomes. (b) Photorespiration happens when there is an abundance of oxygen rather than carbon dioxide,...

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The correct sequence of flow of electrons in the light reaction is
a. PSII, plastoquinone, cytochromes, PSI, ferredoxin

b. PSI, plastoquinone, cytochromes, PSII, ferredoxin

c. PSI, ferredoxin, PSII,

d. PSI, plastoquinone, cytochromes, PSII, ferredoxin

Solution: Inside thylakoids, light processes take place. It is dependent on the presence of light. It involves water photolysis (the splitting of water into H 2 and O 2 and the generation of...

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