Which of the following are the purine nucleotides in DNA?
A.Adenine and thymine
B.Cytosine and guanine
C.Adenine and cytosine
D.Guanine and adenine
E.Thymine and uracil
The purine nucleotides in DNA are guanine (G) and adenine (A). To determine the answer to this question, we need to understand the different types of nucleotides that make up DNA and their base pairs.
In DNA, there are four types of nucleotides: adenine (A), guanine (G), cytosine (C), and thymine (T). These nucleotides pair together and form the building blocks of the DNA molecule. Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).
By analyzing the answer choices, we can identify that the correct option is D. Guanine and adenine are the purine nucleotides in DNA.
Therefore, the correct answer is:
D. Guanine and adenine