$\text{Base} + \text{Ribose} + \text{Phosphate}$

Question 1

Which of the following is a pyrimidine base found in RNA but not in DNA?

Accepted Answer

Uracil

Question 2

What is the sugar component in the backbone of DNA nucleotides?

Accepted Answer

Deoxyribose

Question 3

Which of the following correctly describes a nucleoside?

Accepted Answer

A combination of a base and sugar

Question 4

Which base is present in DNA but not in RNA?

Accepted Answer

Thymine

Question 5

A nucleotide is composed of which three components?

Accepted Answer

Base, sugar, and phosphate

Question 6

Which of the following is the correct name for the nucleoside formed from guanine and ribose?

Accepted Answer

Guanosine

Question 7

Which of the following nucleotides is found only in DNA and not in RNA?

Accepted Answer

Deoxythymidine monophosphate (dTMP)

Question 8

What type of bond connects the base to the sugar in a nucleoside?

Accepted Answer

N-glycosidic bond

Question 9

Which of the following is a purine base?

Accepted Answer

Adenine

Question 10

If a nucleotide contains ribose, cytosine, and a phosphate group, in which nucleic acid is it found?

Accepted Answer

RNA only

Question 11

Which of the following correctly matches the base with its nucleoside name in RNA?

Accepted Answer

Uracil - Uridine

Question 12

Which carbon of the sugar does the phosphate group attach to in a nucleotide?

Accepted Answer

Carbon 5

Question 13

Which of the following is true about the backbone of nucleic acids?

Accepted Answer

It consists of alternating sugar and phosphate groups

Question 14

Which of the following is a correct statement about the difference between DNA and RNA sugars?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose

Question 15

Which of the following is the correct formula for a nucleotide found in RNA?

Accepted Answer

$	ext{Base} + 	ext{Ribose} + 	ext{Phosphate}$

Question 16

A patient’s DNA sample is analyzed and found to contain deoxyguanosine monophosphate (dGMP). Which components are present in this nucleotide?

Accepted Answer

Guanine, deoxyribose, phosphate

Question 17

Which of the following is NOT a component of RNA?

Accepted Answer

Deoxyribose

Question 18

Which of the following statements best explains why thymine is found in DNA but not in RNA?

Accepted Answer

RNA uses uracil instead of thymine to pair with adenine

Question 19

Which of the following is the correct name for the nucleotide formed from cytosine, ribose, and phosphate?

Accepted Answer

Cytidine monophosphate (CMP)

Question 20

Which of the following is a correct description of the difference between a nucleoside and a nucleotide?

Accepted Answer

A nucleoside contains a base and sugar; a nucleotide contains a base, sugar, and phosphate

Nucleic Acids and Protein Synthesis: Components and Structure

Study Guide - Practice Questions