BIOS 255 Week 5 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the function of the nucleolus?
A. Synthesize ribosomal RNA
B. Store DNA
C. Produce ATP
D. Digest macromolecules
Correct Answer: A
Rationale: The nucleolus is the site of rRNA synthesis and ribosome
assembly.
2. Which organelle is responsible for protein folding and
modification?
A. Rough ER
B. Smooth ER
C. Golgi apparatus
D. Lysosome
Correct Answer: A
,Rationale: The rough ER has ribosomes that translate proteins and
assists in folding and modification.
3. What type of junction allows ions to pass directly between
adjacent cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Hemidesmosome
Correct Answer: B
Rationale: Gap junctions form channels allowing ions and small
molecules to move between cells.
4. Which structure prevents leakage between epithelial cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Hemidesmosome
Correct Answer: A
Rationale: Tight junctions seal adjacent epithelial cells to prevent
fluid passage.
5. Which structure anchors cells to the extracellular matrix?
A. Tight junction
B. Gap junction
,C. Desmosome
D. Hemidesmosome
Correct Answer: D
Rationale: Hemidesmosomes attach cells to the basement
membrane.
6. Which organelle is involved in autophagy?
A. Mitochondria
B. Lysosome
C. Golgi apparatus
D. Ribosome
Correct Answer: B
Rationale: Lysosomes digest damaged organelles and
macromolecules via autophagy.
7. Which organelle synthesizes steroid hormones?
A. Rough ER
B. Smooth ER
C. Golgi apparatus
D. Ribosome
Correct Answer: B
Rationale: Smooth ER synthesizes lipids and steroid hormones.
8. Which macromolecule forms the structural framework of the
cytoskeleton?
, A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids
Correct Answer: B
Rationale: Cytoskeletal proteins (actin, tubulin, intermediate
filaments) provide structural support.
9. Which cytoskeletal component is involved in intracellular
transport?
A. Actin filaments
B. Microtubules
C. Intermediate filaments
D. Keratin
Correct Answer: B
Rationale: Microtubules serve as tracks for organelle and vesicle
movement.
10. Which phase of mitosis involves chromosome condensation?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: A
Rationale: Chromosomes condense during prophase.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the function of the nucleolus?
A. Synthesize ribosomal RNA
B. Store DNA
C. Produce ATP
D. Digest macromolecules
Correct Answer: A
Rationale: The nucleolus is the site of rRNA synthesis and ribosome
assembly.
2. Which organelle is responsible for protein folding and
modification?
A. Rough ER
B. Smooth ER
C. Golgi apparatus
D. Lysosome
Correct Answer: A
,Rationale: The rough ER has ribosomes that translate proteins and
assists in folding and modification.
3. What type of junction allows ions to pass directly between
adjacent cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Hemidesmosome
Correct Answer: B
Rationale: Gap junctions form channels allowing ions and small
molecules to move between cells.
4. Which structure prevents leakage between epithelial cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Hemidesmosome
Correct Answer: A
Rationale: Tight junctions seal adjacent epithelial cells to prevent
fluid passage.
5. Which structure anchors cells to the extracellular matrix?
A. Tight junction
B. Gap junction
,C. Desmosome
D. Hemidesmosome
Correct Answer: D
Rationale: Hemidesmosomes attach cells to the basement
membrane.
6. Which organelle is involved in autophagy?
A. Mitochondria
B. Lysosome
C. Golgi apparatus
D. Ribosome
Correct Answer: B
Rationale: Lysosomes digest damaged organelles and
macromolecules via autophagy.
7. Which organelle synthesizes steroid hormones?
A. Rough ER
B. Smooth ER
C. Golgi apparatus
D. Ribosome
Correct Answer: B
Rationale: Smooth ER synthesizes lipids and steroid hormones.
8. Which macromolecule forms the structural framework of the
cytoskeleton?
, A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids
Correct Answer: B
Rationale: Cytoskeletal proteins (actin, tubulin, intermediate
filaments) provide structural support.
9. Which cytoskeletal component is involved in intracellular
transport?
A. Actin filaments
B. Microtubules
C. Intermediate filaments
D. Keratin
Correct Answer: B
Rationale: Microtubules serve as tracks for organelle and vesicle
movement.
10. Which phase of mitosis involves chromosome condensation?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: A
Rationale: Chromosomes condense during prophase.
