BIOS 251 Week 6 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which structure regulates what enters and leaves the cell?
A. Nucleus
B. Cell membrane
C. Cytoplasm
D. Ribosome
Correct answer: B
Rationale: The cell membrane is selectively permeable.
2. The fluid mosaic model describes the structure of the:
A. Nucleus
B. Cytoplasm
C. Cell membrane
D. Mitochondria
Correct answer: C
Rationale: The membrane is made of lipids and proteins.
,3. Which molecule forms the basic structure of the membrane?
A. Protein
B. Phospholipid
C. Carbohydrate
D. Cholesterol
Correct answer: B
Rationale: Phospholipids form a bilayer.
4. Which part of phospholipid is hydrophobic?
A. Head
B. Tail
C. Both
D. None
Correct answer: B
Rationale: Fatty acid tails repel water.
5. Which transport requires no energy?
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Correct answer: B
,Rationale: Diffusion moves substances down concentration
gradient.
6. Movement of water across membrane is called:
A. Diffusion
B. Osmosis
C. Filtration
D. Active transport
Correct answer: B
Rationale: Osmosis is diffusion of water.
7. Which transport uses ATP?
A. Diffusion
B. Facilitated diffusion
C. Active transport
D. Osmosis
Correct answer: C
Rationale: Active transport moves substances against gradient.
8. Which protein helps diffusion across membrane?
A. Enzyme
B. Channel protein
C. DNA
, D. Lipid
Correct answer: B
Rationale: Channel proteins aid facilitated diffusion.
9. Hypertonic solution causes cell to:
A. Swell
B. Shrink
C. Burst
D. Divide
Correct answer: B
Rationale: Water leaves the cell in hypertonic solution.
10. Hypotonic solution causes cell to:
A. Shrink
B. Swell
C. Stay same
D. Harden
Correct answer: B
Rationale: Water enters the cell.
11. Isotonic solution results in:
A. No net movement
B. Swelling
C. Shrinking
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which structure regulates what enters and leaves the cell?
A. Nucleus
B. Cell membrane
C. Cytoplasm
D. Ribosome
Correct answer: B
Rationale: The cell membrane is selectively permeable.
2. The fluid mosaic model describes the structure of the:
A. Nucleus
B. Cytoplasm
C. Cell membrane
D. Mitochondria
Correct answer: C
Rationale: The membrane is made of lipids and proteins.
,3. Which molecule forms the basic structure of the membrane?
A. Protein
B. Phospholipid
C. Carbohydrate
D. Cholesterol
Correct answer: B
Rationale: Phospholipids form a bilayer.
4. Which part of phospholipid is hydrophobic?
A. Head
B. Tail
C. Both
D. None
Correct answer: B
Rationale: Fatty acid tails repel water.
5. Which transport requires no energy?
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Correct answer: B
,Rationale: Diffusion moves substances down concentration
gradient.
6. Movement of water across membrane is called:
A. Diffusion
B. Osmosis
C. Filtration
D. Active transport
Correct answer: B
Rationale: Osmosis is diffusion of water.
7. Which transport uses ATP?
A. Diffusion
B. Facilitated diffusion
C. Active transport
D. Osmosis
Correct answer: C
Rationale: Active transport moves substances against gradient.
8. Which protein helps diffusion across membrane?
A. Enzyme
B. Channel protein
C. DNA
, D. Lipid
Correct answer: B
Rationale: Channel proteins aid facilitated diffusion.
9. Hypertonic solution causes cell to:
A. Swell
B. Shrink
C. Burst
D. Divide
Correct answer: B
Rationale: Water leaves the cell in hypertonic solution.
10. Hypotonic solution causes cell to:
A. Shrink
B. Swell
C. Stay same
D. Harden
Correct answer: B
Rationale: Water enters the cell.
11. Isotonic solution results in:
A. No net movement
B. Swelling
C. Shrinking
