BIOS 255 Week 5 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organelle is responsible for ATP production?
A. Ribosome
B. Mitochondria
C. Golgi apparatus
D. Lysosome
Correct Answer: B
Rationale: Mitochondria generate energy via oxidative
phosphorylation.
2. Which organelle synthesizes proteins for secretion?
A. Rough ER
B. Smooth ER
C. Nucleolus
D. Lysosome
Correct Answer: A
Rationale: Rough ER contains ribosomes for protein synthesis.
,3. Which organelle modifies and packages proteins?
A. Rough ER
B. Golgi apparatus
C. Smooth ER
D. Ribosome
Correct Answer: B
Rationale: The Golgi apparatus processes and directs proteins to
their destination.
4. Which organelle detoxifies chemicals and synthesizes lipids?
A. Rough ER
B. Smooth ER
C. Lysosome
D. Golgi apparatus
Correct Answer: B
Rationale: Smooth ER metabolizes toxins and produces lipids and
steroid hormones.
5. Which organelle contains hydrolytic enzymes for digestion?
A. Ribosome
B. Lysosome
C. Golgi apparatus
D. Smooth ER
Correct Answer: B
,Rationale: Lysosomes break down macromolecules and damaged
organelles.
6. Which cytoskeletal element forms microtubules?
A. Actin
B. Tubulin
C. Keratin
D. Myosin
Correct Answer: B
Rationale: Tubulin assembles into microtubules for structural
support and transport.
7. Which cytoskeletal element forms microfilaments?
A. Actin
B. Tubulin
C. Keratin
D. Myosin
Correct Answer: A
Rationale: Actin filaments are involved in cell shape and motility.
8. Which cytoskeletal element provides mechanical strength?
A. Actin
B. Tubulin
C. Intermediate filaments
D. Myosin
, Correct Answer: C
Rationale: Intermediate filaments stabilize cell structure.
9. Which enzyme unwinds DNA at the replication fork?
A. DNA polymerase
B. Helicase
C. Ligase
D. Primase
Correct Answer: B
Rationale: Helicase separates the two DNA strands for replication.
10. Which enzyme synthesizes new DNA strands?
A. DNA polymerase
B. Helicase
C. Ligase
D. Primase
Correct Answer: A
Rationale: DNA polymerase adds nucleotides complementary to the
template.
11. Which enzyme joins Okazaki fragments?
A. DNA polymerase
B. Ligase
C. Helicase
D. Primase
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organelle is responsible for ATP production?
A. Ribosome
B. Mitochondria
C. Golgi apparatus
D. Lysosome
Correct Answer: B
Rationale: Mitochondria generate energy via oxidative
phosphorylation.
2. Which organelle synthesizes proteins for secretion?
A. Rough ER
B. Smooth ER
C. Nucleolus
D. Lysosome
Correct Answer: A
Rationale: Rough ER contains ribosomes for protein synthesis.
,3. Which organelle modifies and packages proteins?
A. Rough ER
B. Golgi apparatus
C. Smooth ER
D. Ribosome
Correct Answer: B
Rationale: The Golgi apparatus processes and directs proteins to
their destination.
4. Which organelle detoxifies chemicals and synthesizes lipids?
A. Rough ER
B. Smooth ER
C. Lysosome
D. Golgi apparatus
Correct Answer: B
Rationale: Smooth ER metabolizes toxins and produces lipids and
steroid hormones.
5. Which organelle contains hydrolytic enzymes for digestion?
A. Ribosome
B. Lysosome
C. Golgi apparatus
D. Smooth ER
Correct Answer: B
,Rationale: Lysosomes break down macromolecules and damaged
organelles.
6. Which cytoskeletal element forms microtubules?
A. Actin
B. Tubulin
C. Keratin
D. Myosin
Correct Answer: B
Rationale: Tubulin assembles into microtubules for structural
support and transport.
7. Which cytoskeletal element forms microfilaments?
A. Actin
B. Tubulin
C. Keratin
D. Myosin
Correct Answer: A
Rationale: Actin filaments are involved in cell shape and motility.
8. Which cytoskeletal element provides mechanical strength?
A. Actin
B. Tubulin
C. Intermediate filaments
D. Myosin
, Correct Answer: C
Rationale: Intermediate filaments stabilize cell structure.
9. Which enzyme unwinds DNA at the replication fork?
A. DNA polymerase
B. Helicase
C. Ligase
D. Primase
Correct Answer: B
Rationale: Helicase separates the two DNA strands for replication.
10. Which enzyme synthesizes new DNA strands?
A. DNA polymerase
B. Helicase
C. Ligase
D. Primase
Correct Answer: A
Rationale: DNA polymerase adds nucleotides complementary to the
template.
11. Which enzyme joins Okazaki fragments?
A. DNA polymerase
B. Ligase
C. Helicase
D. Primase
