Multiple Choice
How are the two strands of nucleic acid in DNA held together?
4
views
7. DNA and Chromosome Structure
DNA Structure
Struggling with Genetics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following lists correctly identifies the four nitrogenous bases found in DNA?
A
Thymine, Uracil, Cytosine, Guanine
B
Adenine, Uracil, Cytosine, Guanine
C
Adenine, Thymine, Cytosine, Uracil
D
Adenine, Thymine, Cytosine, Guanine
Verified step by step guidance1
Recall that DNA is composed of four nitrogenous bases which are divided into two categories: purines and pyrimidines.
Identify the purines in DNA: Adenine (A) and Guanine (G).
Identify the pyrimidines in DNA: Cytosine (C) and Thymine (T).
Note that Uracil (U) is found in RNA, not DNA, so any list containing Uracil is incorrect for DNA bases.
Therefore, the correct list of nitrogenous bases in DNA is Adenine, Thymine, Cytosine, and Guanine.
Related Videos
Related Practice
