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NEET UG BIOLOGY MCQ: MOLECULAR BASIS OF INHERITANCE
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+4 | -1
If a double–stranded DNA has 30% of guanine, what will be the percentage of adenine and thymine base pairs?
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Correct option: C
0.4
Option A (0.4) is correct because in double-stranded DNA, the amount of guanine (G) equals cytosine (C), and adenine (A) equals thymine (T). If G is 30%, then C is 30%, leaving 40% for A and T combined, so A = T = 20%. Thus, the percentage of adenine and thymine base pairs is 0.4.
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show high adaptability to the changing
environment.
Reason: Member of kingdom Monera are
efficient in regulating gene expression. Which of the following is not true for DNA polymerase? Dystrophin gene consists of Read the following four statements (i-iv).
i. In transcription, adenosine pairs with uracil.
ii. Regulation of lac operon by repressor is referred to as positive regulation
iii. The human genome has approximately 30,000 genes
iv. Haemophilia is a sex-linked recessive disease
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