3. Correct the following statements for mistakes, if
any.
(a) The four nitrogenous bases in the DNA are
Guanine, Thiamine, Adrenaline and Cytosine.
(b) Genes are specific sequences of bases on a
chromosome.
(c) A nucleotide is composed of a sulphate, a sugar
(pentose) and a nitrogenous base.
(d) Nucleosomes are groups of cysteine molecules
surrounded by DNA strands.
(e) If there are 46 chromosomes in a cell, there will be
23 chromatin fibres inside the nucleus during
interphase.
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(c) a nucleotide is composed of a phosphate a sugar pentose and a nitrogenous base
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