BIOS 255 Week 2 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of RNA carries amino acids to the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: tRNA transports amino acids to the ribosome during
translation.
2. Which RNA serves as the template for protein synthesis?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: A
Rationale: mRNA carries the genetic code from DNA to the
ribosome for translation.
,3. Which RNA is a structural component of ribosomes?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA combines with proteins to form ribosomes.
4. Which enzyme synthesizes RNA from a DNA template?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase catalyzes transcription of DNA into
RNA.
5. Where does transcription occur in eukaryotic cells?
A. Cytoplasm
B. Nucleus
C. Ribosome
D. Mitochondria
Correct Answer: B
Rationale: Transcription occurs in the nucleus, where DNA is
located.
,6. Which nucleotide base pairs with adenine in RNA?
A. Thymine
B. Uracil
C. Cytosine
D. Guanine
Correct Answer: B
Rationale: In RNA, uracil replaces thymine and pairs with adenine.
7. What is the function of snRNA?
A. Carry amino acids
B. Form ribosome structure
C. Involved in mRNA splicing
D. Replicate DNA
Correct Answer: C
Rationale: snRNA is part of the spliceosome, which removes introns
from pre-mRNA.
8. Which process removes introns from pre-mRNA?
A. Translation
B. Splicing
C. Replication
D. Transcription
Correct Answer: B
Rationale: Splicing removes non-coding introns to produce mature
mRNA.
, 9. What is the start codon for translation?
A. UAG
B. UAA
C. AUG
D. UGA
Correct Answer: C
Rationale: AUG codes for methionine and signals the start of
translation.
10. Which codon signals termination of translation?
A. AUG
B. UAA, UAG, UGA
C. AAA
D. GGG
Correct Answer: B
Rationale: UAA, UAG, and UGA are stop codons that terminate
protein synthesis.
11. Which direction is mRNA synthesized?
A. 3’ → 5’
B. 5’ → 3’
C. 3’ → 3’
D. 5’ → 5’
Correct Answer: B
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of RNA carries amino acids to the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: tRNA transports amino acids to the ribosome during
translation.
2. Which RNA serves as the template for protein synthesis?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: A
Rationale: mRNA carries the genetic code from DNA to the
ribosome for translation.
,3. Which RNA is a structural component of ribosomes?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA combines with proteins to form ribosomes.
4. Which enzyme synthesizes RNA from a DNA template?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase catalyzes transcription of DNA into
RNA.
5. Where does transcription occur in eukaryotic cells?
A. Cytoplasm
B. Nucleus
C. Ribosome
D. Mitochondria
Correct Answer: B
Rationale: Transcription occurs in the nucleus, where DNA is
located.
,6. Which nucleotide base pairs with adenine in RNA?
A. Thymine
B. Uracil
C. Cytosine
D. Guanine
Correct Answer: B
Rationale: In RNA, uracil replaces thymine and pairs with adenine.
7. What is the function of snRNA?
A. Carry amino acids
B. Form ribosome structure
C. Involved in mRNA splicing
D. Replicate DNA
Correct Answer: C
Rationale: snRNA is part of the spliceosome, which removes introns
from pre-mRNA.
8. Which process removes introns from pre-mRNA?
A. Translation
B. Splicing
C. Replication
D. Transcription
Correct Answer: B
Rationale: Splicing removes non-coding introns to produce mature
mRNA.
, 9. What is the start codon for translation?
A. UAG
B. UAA
C. AUG
D. UGA
Correct Answer: C
Rationale: AUG codes for methionine and signals the start of
translation.
10. Which codon signals termination of translation?
A. AUG
B. UAA, UAG, UGA
C. AAA
D. GGG
Correct Answer: B
Rationale: UAA, UAG, and UGA are stop codons that terminate
protein synthesis.
11. Which direction is mRNA synthesized?
A. 3’ → 5’
B. 5’ → 3’
C. 3’ → 3’
D. 5’ → 5’
Correct Answer: B
