CHEM 210 Biochemistry Module 5 Practice
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2025
Q&A | Instant Download PDF
1. Which of the following is the primary function of nucleic acids in the
cell?
A. Catalysis
B. Storage and transmission of genetic information
C. Structural support
D. Energy storage
Nucleic acids, such as DNA and RNA, are responsible for storing and
transferring genetic instructions.
2. What type of bond holds together the backbone of DNA?
A. Hydrogen bonds
B. Phosphodiester bonds
C. Glycosidic bonds
, D. Peptide bonds
Phosphodiester bonds link the 5' phosphate group of one nucleotide
to the 3' hydroxyl group of the next.
3. Which base is found in RNA but not in DNA?
A. Thymine
B. Cytosine
C. Uracil
D. Guanine
RNA contains uracil instead of thymine, which pairs with adenine.
4. DNA strands run in which direction relative to each other?
A. Parallel
B. Antiparallel
C. Perpendicular
D. Random
DNA strands run in opposite directions (5' to 3' and 3' to 5'), which is
essential for base pairing.
5. The enzyme responsible for DNA replication is:
A. RNA polymerase
B. DNA polymerase
C. Ligase
D. Helicase
DNA polymerase synthesizes new DNA strands during replication.
, 6. What is the function of helicase in DNA replication?
A. Synthesizes RNA primers
B. Unwinds the DNA double helix
C. Joins Okazaki fragments
D. Adds nucleotides to the growing strand
Helicase breaks hydrogen bonds, separating the DNA strands.
7. During transcription, the DNA sequence ACGT is transcribed into:
A. UGCA
B. TGCA
C. ACGT
D. TCGT
Transcription uses RNA nucleotides, replacing thymine (T) with uracil
(U).
8. Which of the following processes occurs in the nucleus?
A. Transcription
B. Translation
C. Glycolysis
D. Protein folding
Transcription of DNA into RNA occurs in the nucleus.
9. The mRNA codon AUG codes for which amino acid?
A. Glycine
B. Alanine
C. Methionine
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2025
Q&A | Instant Download PDF
1. Which of the following is the primary function of nucleic acids in the
cell?
A. Catalysis
B. Storage and transmission of genetic information
C. Structural support
D. Energy storage
Nucleic acids, such as DNA and RNA, are responsible for storing and
transferring genetic instructions.
2. What type of bond holds together the backbone of DNA?
A. Hydrogen bonds
B. Phosphodiester bonds
C. Glycosidic bonds
, D. Peptide bonds
Phosphodiester bonds link the 5' phosphate group of one nucleotide
to the 3' hydroxyl group of the next.
3. Which base is found in RNA but not in DNA?
A. Thymine
B. Cytosine
C. Uracil
D. Guanine
RNA contains uracil instead of thymine, which pairs with adenine.
4. DNA strands run in which direction relative to each other?
A. Parallel
B. Antiparallel
C. Perpendicular
D. Random
DNA strands run in opposite directions (5' to 3' and 3' to 5'), which is
essential for base pairing.
5. The enzyme responsible for DNA replication is:
A. RNA polymerase
B. DNA polymerase
C. Ligase
D. Helicase
DNA polymerase synthesizes new DNA strands during replication.
, 6. What is the function of helicase in DNA replication?
A. Synthesizes RNA primers
B. Unwinds the DNA double helix
C. Joins Okazaki fragments
D. Adds nucleotides to the growing strand
Helicase breaks hydrogen bonds, separating the DNA strands.
7. During transcription, the DNA sequence ACGT is transcribed into:
A. UGCA
B. TGCA
C. ACGT
D. TCGT
Transcription uses RNA nucleotides, replacing thymine (T) with uracil
(U).
8. Which of the following processes occurs in the nucleus?
A. Transcription
B. Translation
C. Glycolysis
D. Protein folding
Transcription of DNA into RNA occurs in the nucleus.
9. The mRNA codon AUG codes for which amino acid?
A. Glycine
B. Alanine
C. Methionine
