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QUESTION 34 The nucleotide sequence of one DNA strand of a DNA double helix is 5-GGATTTTTGTCCACAATCA-3 What is the sequence
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Answer #1

The given sequence is 5’-GGATTTTTGTCCACAATCA-3’

The answer for question no. 34 is “C

Complementary sequence would be 3’-CCTAAAAACAGGTGTTAGT-5’

Explanation: In DNA double strand the base pairing is complementary Adenine(A) always pairs with Thymine and vice versa. Guanine(G) always pairs with Cytosine(C).

The DNA strands are antiparallel to each other hence the complementary strand will be run in 3’ to 5’ direction.

Answer 35: “B”   19%G,19% C,31%T

Explanation: Chloroplast DNA is smaller and circular as against nuclear DNA.

The base pairing rules remain the same A pairs with T and G pairs with C

If the percentage of adenine is 31% then the percentage of thymine will be equal to 31% as adenine is always paired with thymine.

A+T = 62% then remaining percentage i.e 38% will be equal to G+C

Therefore G will be 19% and C will be 19%

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