BIOS 255 Week 4 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of DNA?
A. Catalyze reactions
B. Store genetic information
C. Transport amino acids
D. Provide energy
Correct Answer: B
Rationale: DNA stores hereditary information for protein synthesis
and cell function.
2. Which nitrogenous base is found in RNA but not in DNA?
A. Adenine
B. Thymine
C. Uracil
D. Cytosine
Correct Answer: C
Rationale: RNA contains uracil instead of thymine.
,3. Which sugar is present in RNA?
A. Deoxyribose
B. Ribose
C. Glucose
D. Fructose
Correct Answer: B
Rationale: RNA contains ribose sugar.
4. Which sugar is present in DNA?
A. Deoxyribose
B. Ribose
C. Glucose
D. Fructose
Correct Answer: A
Rationale: DNA contains deoxyribose sugar.
5. Which type of bond connects complementary DNA bases?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Correct Answer: C
Rationale: Hydrogen bonds hold complementary base pairs
together.
,6. Which type of bond forms the DNA backbone?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Correct Answer: B
Rationale: Covalent phosphodiester bonds link sugar and phosphate
groups.
7. What is the complementary DNA strand of 5'-ATGC-3'?
A. 3'-TACG-5'
B. 5'-TACG-3'
C. 3'-ATGC-5'
D. 5'-GCAT-3'
Correct Answer: A
Rationale: Complementary base pairing follows A–T and G–C rules.
8. Which enzyme synthesizes RNA from a DNA template?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase transcribes DNA into RNA.
, 9. Which RNA carries amino acids to the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: tRNA delivers amino acids according to the codon
sequence.
10. Which RNA forms part of the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA contributes to ribosomal structure and function.
11. Which RNA participates in splicing?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: D
Rationale: snRNA is a component of the spliceosome for intron
removal.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of DNA?
A. Catalyze reactions
B. Store genetic information
C. Transport amino acids
D. Provide energy
Correct Answer: B
Rationale: DNA stores hereditary information for protein synthesis
and cell function.
2. Which nitrogenous base is found in RNA but not in DNA?
A. Adenine
B. Thymine
C. Uracil
D. Cytosine
Correct Answer: C
Rationale: RNA contains uracil instead of thymine.
,3. Which sugar is present in RNA?
A. Deoxyribose
B. Ribose
C. Glucose
D. Fructose
Correct Answer: B
Rationale: RNA contains ribose sugar.
4. Which sugar is present in DNA?
A. Deoxyribose
B. Ribose
C. Glucose
D. Fructose
Correct Answer: A
Rationale: DNA contains deoxyribose sugar.
5. Which type of bond connects complementary DNA bases?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Correct Answer: C
Rationale: Hydrogen bonds hold complementary base pairs
together.
,6. Which type of bond forms the DNA backbone?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Correct Answer: B
Rationale: Covalent phosphodiester bonds link sugar and phosphate
groups.
7. What is the complementary DNA strand of 5'-ATGC-3'?
A. 3'-TACG-5'
B. 5'-TACG-3'
C. 3'-ATGC-5'
D. 5'-GCAT-3'
Correct Answer: A
Rationale: Complementary base pairing follows A–T and G–C rules.
8. Which enzyme synthesizes RNA from a DNA template?
A. DNA polymerase
B. RNA polymerase
C. Ligase
D. Helicase
Correct Answer: B
Rationale: RNA polymerase transcribes DNA into RNA.
, 9. Which RNA carries amino acids to the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: B
Rationale: tRNA delivers amino acids according to the codon
sequence.
10. Which RNA forms part of the ribosome?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Correct Answer: C
Rationale: rRNA contributes to ribosomal structure and function.
11. Which RNA participates in splicing?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: D
Rationale: snRNA is a component of the spliceosome for intron
removal.
