Question

Why can you predict the base sequence of one strand in a molecule of DNA if you know the sequence of the other strand?

In DNA, each base pairs up with only one other base.

The order of bases in the two strands are identical.

There are only two base sequences, and a DNA molecule has each.

Every molecule of DNA has the same base sequence.

Answer 1

In DNA, each base pairs up with only
one other base

Answer 2

Option A, In DNA, each base pairs up with only one other base.

Step-by-step explanation:

DNA is made up of two complementary nucleotide (also referred to as base pairs). It is the purine which associates with the pyrimidine group.

The four bases in DNA are

• adenine (A) - a purine

• cytosine(C) - a pyrimidine

• guanine (G) - a purine

• thymine (T) - a pyrimidine

Adenine is complementary to thymine and cytosine is complementary to guanine . Thus, Adenine forms complementary pair with thymine and cytosine forms complementary pair with guanine.

Hence, option A is correct.