Questions on Nucleic Acids
20 multiple choice questions on Nucleic Acids, appropriate for high school or introductory college biology courses. The correct answers are listed at the end.
Multiple Choice Questions: Nucleic Acids
1. What are the building blocks of nucleic acids?
A) Amino acids
B) Fatty acids
C) Nucleotides
D) Monosaccharides
2. Which of the following is a nucleic acid?
A) DNA
B) Glucose
C) Protein
D) Cellulose
3. What are the two main types of nucleic acids?
A) DNA and ATP
B) RNA and DNA
C) Protein and RNA
D) Glucose and DNA
4. Which sugar is found in RNA?
A) Deoxyribose
B) Ribose
C) Glucose
D) Sucrose
5. Which sugar is found in DNA?
A) Ribose
B) Glucose
C) Deoxyribose
D) Fructose
6. Which of the following bases is found only in RNA?
A) Adenine
B) Cytosine
C) Uracil
D) Thymine
7. Which of the following bases is found only in DNA?
A) Uracil
B) Thymine
C) Adenine
D) Cytosine
8. The nitrogenous bases in DNA pair by:
A) Ionic bonds
B) Covalent bonds
C) Hydrogen bonds
D) Peptide bonds
9. Which base pairs with adenine in DNA?
A) Guanine
B) Cytosine
C) Uracil
D) Thymine
10. Which base pairs with guanine in DNA?
A) Adenine
B) Cytosine
C) Thymine
D) Uracil
11. What is the function of DNA?
A) Break down nutrients
B) Store genetic information
C) Provide energy
D) Regulate blood sugar
12. RNA’s main function is to:
A) Store energy
B) Store genetic code
C) Act as an enzyme
D) Help make proteins
13. In DNA, the backbone is made of:
A) Nitrogen bases and phosphate
B) Phosphate and sugar
C) Ribose and bases
D) Amino acids and phosphate
14. What type of RNA carries genetic information from DNA to the ribosome?
A) tRNA
B) mRNA
C) rRNA
D) cRNA
15. Which type of RNA brings amino acids to the ribosome?
A) mRNA
B) tRNA
C) rRNA
D) dRNA
16. Which of the following is not a part of a nucleotide?
A) Phosphate group
B) Sugar
C) Amino group
D) Nitrogenous base
17. What shape is the DNA molecule typically described as?
A) Linear strand
B) Double helix
C) Triple strand
D) Circle
18. Which nitrogen bases are purines?
A) Adenine and thymine
B) Cytosine and uracil
C) Adenine and guanine
D) Guanine and cytosine
19. Which of the following molecules is used as an energy carrier in cells and is technically a nucleotide?
A) DNA
B) RNA
C) ATP
D) Enzyme
20. Nucleic acids contain which elements?
A) C, H, O
B) C, H, O, N
C) C, H, O, N, P
D) C, H, O, N, S
Answer Key
1. C) Nucleotides
2. A) DNA
3. B) RNA and DNA
4. B) Ribose
5. C) Deoxyribose
6. C) Uracil
7. B) Thymine
8. C) Hydrogen bonds
9. D) Thymine
10. B) Cytosine
11. B) Store genetic information
12. D) Help make proteins
13. B) Phosphate and sugar
14. B) mRNA
15. B) tRNA
16. C) Amino group
17. B) Double helix
18. C) Adenine and guanine
19. C) ATP
20. C) C, H, O, N, P
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