Which is the correct pair of complementary nitrogenous bases in DNA?. A ) adenine and thymine . B ) cytosine and thymine. C ) gu

Question

ohaa [14]

3 years ago

12

Which is the correct pair of complementary nitrogenous bases in DNA?. A ) adenine and thymine . B ) cytosine and thymine. C ) gu

anine and thymine. .

Biology

2 answers:

Tresset [83] · Answer 1 · 2022-06-12T06:01:39+03:00

Tresset [83]3 years ago

8 0

Answer - A
Adenine pairs up with thymine, and cytosine pairs up with guanine.

zzz [600] · Answer 2 · 2022-06-12T07:04:37+03:00

Answer:

A ) adenine and thymine

Explanation:

DNA has two types of nitrogenous bases: purines and pyrimidines. Adenine and guanine are purines while cytosine and thymine are pyrimidines.

A purine always pairs with a pyrimidine. Hence, adenine in DNA pairs with thymine while guanine pairs with cytosine. This is done to maintain the constant width of the double helix throughout the length.