Multiple Choice
DNA carries which overall electrical charge under physiological conditions, and what structural feature is primarily responsible?
40
views
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
Which set of nitrogenous bases is found in DNA?
A
Adenine, thymine, cytosine, and uracil
B
Thymine, uracil, cytosine, and guanine
C
Adenine, uracil, cytosine, and guanine
D
Adenine, thymine, cytosine, and 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 purine bases in DNA: adenine (A) and guanine (G).
Identify the pyrimidine bases in DNA: cytosine (C) and thymine (T).
Note that uracil (U) is not found in DNA; it is present in RNA instead, replacing thymine.
Combine the correct bases to list the set found in DNA: adenine, thymine, cytosine, and guanine.
Related Videos
Related Practice
