BIOS 255 Week 4 Quiz Exam 1 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of RNA carries the genetic information from DNA
to ribosomes?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: mRNA serves as the template for protein synthesis.
2. Which type of RNA brings amino acids to the ribosome?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: A
Rationale: tRNA matches amino acids to codons in mRNA.
,3. Which RNA is part of the ribosome’s structure?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA provides structural and catalytic roles in
ribosomes.
4. Which RNA participates in splicing?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: D
Rationale: snRNA is part of the spliceosome that removes introns.
5. During transcription, which enzyme synthesizes RNA?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase reads DNA and synthesizes RNA.
,6. What is the start codon for translation?
A. AUG
B. UAA
C. UAG
D. UGA
Correct Answer: A
Rationale: AUG codes for methionine and initiates translation.
7. Which codons terminate translation?
A. AUG
B. UAA, UAG, UGA
C. CCA
D. GGU
Correct Answer: B
Rationale: Stop codons signal the end of protein synthesis.
8. What type of mutation does not change the amino acid?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: A
Rationale: Silent mutations do not alter the protein sequence.
9. Which mutation changes a single amino acid?
, A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: B
Rationale: Missense mutations replace one amino acid with
another.
10. Which mutation introduces a premature stop codon?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: C
Rationale: Nonsense mutations truncate the protein.
11. Which mutation shifts the reading frame?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: D
Rationale: Frameshift mutations result from insertions or deletions.
12. Which DNA repair system removes single damaged bases?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of RNA carries the genetic information from DNA
to ribosomes?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: mRNA serves as the template for protein synthesis.
2. Which type of RNA brings amino acids to the ribosome?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: A
Rationale: tRNA matches amino acids to codons in mRNA.
,3. Which RNA is part of the ribosome’s structure?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA provides structural and catalytic roles in
ribosomes.
4. Which RNA participates in splicing?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: D
Rationale: snRNA is part of the spliceosome that removes introns.
5. During transcription, which enzyme synthesizes RNA?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase reads DNA and synthesizes RNA.
,6. What is the start codon for translation?
A. AUG
B. UAA
C. UAG
D. UGA
Correct Answer: A
Rationale: AUG codes for methionine and initiates translation.
7. Which codons terminate translation?
A. AUG
B. UAA, UAG, UGA
C. CCA
D. GGU
Correct Answer: B
Rationale: Stop codons signal the end of protein synthesis.
8. What type of mutation does not change the amino acid?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: A
Rationale: Silent mutations do not alter the protein sequence.
9. Which mutation changes a single amino acid?
, A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: B
Rationale: Missense mutations replace one amino acid with
another.
10. Which mutation introduces a premature stop codon?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: C
Rationale: Nonsense mutations truncate the protein.
11. Which mutation shifts the reading frame?
A. Silent
B. Missense
C. Nonsense
D. Frameshift
Correct Answer: D
Rationale: Frameshift mutations result from insertions or deletions.
12. Which DNA repair system removes single damaged bases?
