Which of the following nitrogenous bases is found exclusively in DNA?
A. Adenine
B. Cytosine
C. Guanine
D. Thymine
i think it's D
right.
https://answers.yahoo.com/question/index?qid=20081204143123AAiwNG1
Yes, you are correct. Thymine (D) is the nitrogenous base that is found exclusively in DNA. Adenine, cytosine, and guanine are also nitrogenous bases found in both DNA and RNA.
You are correct, thymine is the nitrogenous base that is exclusively found in DNA. To determine this, we need to understand the different nitrogenous bases present in both DNA and RNA.
In DNA, there are four nitrogenous bases: adenine (A), cytosine (C), guanine (G), and thymine (T). Thymine is paired with adenine via hydrogen bonds, forming a complementary base pair.
In RNA, there are also four nitrogenous bases, but instead of thymine, RNA contains uracil (U). Uracil is paired with adenine in RNA.
However, the question specifically asks for the base exclusively found in DNA. Therefore, we can eliminate adenine, cytosine, and guanine as they are present in both DNA and RNA. The correct answer is D, thymine, because it is found exclusively in DNA.
Remember, understanding scientific terms and concepts is crucial for answering questions correctly.