Question 1

Which nitrogenous base is a purine, pairs with cytosine, and is found in both DNA and RNA?

Accepted Answer

Guanine (G)

Question 2

Which nitrogenous base is found only in RNA and pairs with adenine?

Accepted Answer

Uracil (U)

Question 3

Which of the following statements about nitrogenous bases is correct?

Accepted Answer

Adenine pairs with thymine in DNA and with uracil in RNA.

Question 4

Which base pairing is unique to DNA and does not occur in RNA?

Accepted Answer

Adenine–Thymine

Question 5

Which of the following is a pyrimidine that pairs with adenine and is found only in DNA?

Accepted Answer

Thymine (T)

Question 6

If a DNA molecule contains 30% adenine, what percentage of thymine would you expect to find?

Accepted Answer

$$30\%$$

Question 7

Which nitrogenous base is NOT found in DNA?

Accepted Answer

Uracil (U)

Question 8

Which of the following correctly matches the nitrogen base with its family?

Accepted Answer

Guanine (G) – Purine

Question 9

Which base pairing is correct for RNA?

Accepted Answer

Adenine–Uracil

Question 10

Which of the following statements is true regarding the presence of nitrogenous bases in nucleic acids?

Accepted Answer

Uracil is found only in RNA.

Question 11

Which of the following is a purine base found in both DNA and RNA?

Accepted Answer

Guanine (G)

Question 12

Which nitrogenous base is a pyrimidine found only in RNA?

Accepted Answer

Uracil (U)

Question 13

Which of the following statements about base pairing is correct?

Accepted Answer

Cytosine pairs with guanine in both DNA and RNA.

Question 14

Which base is a pyrimidine and pairs with adenine in RNA?

Accepted Answer

Uracil (U)

Question 15

Which of the following is NOT a correct base pairing?

Accepted Answer

Thymine–Uracil in DNA

Genetics: Structure, Function, and Variation of Genetic Material

Study Guide - Practice Questions