Question

the diagram below represents a section of a dna molecule
the missing nitrogen bases from top to bottom are _
o a.g.c
o a.g.g
o u.g.g
o t.c.c

Explanation:

Step1: Recall base - pairing rules

In DNA, adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G).

Step2: Identify top - missing base

Since the base opposite is T, the missing base is A as A - T pairing occurs.

Step3: Identify middle - missing base

As the base opposite is C, the missing base is G due to G - C pairing.

Step4: Identify bottom - missing base

Since the base opposite is G, the missing base is C because of C - G pairing.

Answer:

A. A, G, C