1. The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.
2. Genes are specific sequences of bases on a chromosome.
3. A nucleotide is composed of a sulphate, a sugar (pentose) and a nitrogenous base.
4. Nucleosomes are groups of cysteine molecules surrounded by DNA strands.
5. If there are 46 chromosomes in a cell there will be 23 chromatin fibres inside the nucleus during interphase.
Answers:
- The four nitrogenous bases in the DNA are Guanine, Thymine, Adenine and Cytosine.
2. Genes are specific sequences of nucleotides on a chromosome.
3. A nucleotide is composed of a phosphate, sugar (pentose) and a nitrogenous base.
4. Nucleosomes are groups of histone molecules surrounded by DNA strands.
5. If there are 46 chromosomes in a cell there will be 46 chromatin fibres inside the nucleus during interphase.