A sample of human DNA consists of 30% adenine and 20% guanine. Which is true about the remaining nucleotide

• A DNA has 20% adenine and 30% guanine.

B DNA has 30% thymine and 20% cytosine.

•

C DNA has 20% uradil and 30% cytosine.

•

D. DNA has 30% thymine and 20% uradil.

Question

Frida Lam

Biology

3 December, 14:12

A sample of human DNA consists of 30% adenine and 20% guanine. Which is true about the remaining nucleotide

• A DNA has 20% adenine and 30% guanine.

B DNA has 30% thymine and 20% cytosine.

•

C DNA has 20% uradil and 30% cytosine.

•

D. DNA has 30% thymine and 20% uradil.

+4

Answers (1)

Know the Answer?

Jenny · Answer 1

The correct answer is B) DNA has 30% thymine and 20% cytosine.

Explanation:

We use the Chargaff Law, where:

A + G = C + T (sum of pure bases A and G, is equal to pyrimidines C and T) and, A = T, C = G.

A + G = 30% + 20% = 50% = C + T

Thus:

A = 30% = T

G = 20% = C

A sample of human DNA consists of 30% adenine and 20% guanine. Which is true about the remaining nucleotide• A DNA has 20% adenine and 30% guanine.B DNA has 30% thymine and 20% cytosine.•C DNA has 20% uradil and 30% cytosine.•D. DNA has 30% thymine and 20% uradil.

A sample of human DNA consists of 30% adenine and 20% guanine. Which is true about the remaining nucleotide

• A DNA has 20% adenine and 30% guanine.

B DNA has 30% thymine and 20% cytosine.

•

C DNA has 20% uradil and 30% cytosine.

•

D. DNA has 30% thymine and 20% uradil.