BIOS 150 Week 2 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The smallest unit of life is:
A. Atom
B. Molecule
C. Cell
D. Tissue
Correct Answer: C. Cell
Rationale: The cell is the basic structural and functional unit of all
living organisms.
2. Prokaryotic cells lack:
A. Cytoplasm
B. Nucleus
C. Ribosomes
D. Plasma membrane
Correct Answer: B. Nucleus
Rationale: Prokaryotes do not have a membrane-bound nucleus.
,3. Eukaryotic cells have all the following except:
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Plasmids only
Correct Answer: D. Plasmids only
Rationale: Plasmids are common in prokaryotes, not typical in
eukaryotes.
4. Cell membranes are primarily composed of:
A. Proteins and lipids
B. Carbohydrates only
C. Nucleic acids
D. Polysaccharides
Correct Answer: A. Proteins and lipids
Rationale: The lipid bilayer with embedded proteins forms the
membrane structure.
5. The fluid mosaic model refers to:
A. Nuclear structure
B. Cell membrane structure
C. Cytoplasmic streaming
D. Golgi apparatus
Correct Answer: B. Cell membrane structure
,Rationale: Proteins float in a dynamic lipid bilayer, creating a
mosaic.
6. Which organelle is responsible for ATP production?
A. Lysosome
B. Mitochondria
C. Ribosome
D. Golgi apparatus
Correct Answer: B. Mitochondria
Rationale: Mitochondria produce energy via cellular respiration.
7. Ribosomes function in:
A. DNA replication
B. Protein synthesis
C. ATP production
D. Lipid metabolism
Correct Answer: B. Protein synthesis
Rationale: Ribosomes translate mRNA into polypeptides.
8. Rough endoplasmic reticulum is responsible for:
A. Lipid synthesis
B. Protein synthesis
C. Detoxification
D. DNA replication
, Correct Answer: B. Protein synthesis
Rationale: Ribosomes attached to the rough ER synthesize proteins.
9. Smooth ER functions in:
A. Detoxification and lipid synthesis
B. Protein folding
C. DNA replication
D. ATP production
Correct Answer: A. Detoxification and lipid synthesis
Rationale: Lacks ribosomes and produces lipids and metabolizes
toxins.
10. Golgi apparatus:
A. Synthesizes ATP
B. Modifies and packages proteins
C. Stores DNA
D. Synthesizes lipids
Correct Answer: B. Modifies and packages proteins
Rationale: Golgi sorts and directs proteins to their destinations.
11. Lysosomes contain:
A. DNA
B. Hydrolytic enzymes
C. Ribosomes
D. Lipids
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The smallest unit of life is:
A. Atom
B. Molecule
C. Cell
D. Tissue
Correct Answer: C. Cell
Rationale: The cell is the basic structural and functional unit of all
living organisms.
2. Prokaryotic cells lack:
A. Cytoplasm
B. Nucleus
C. Ribosomes
D. Plasma membrane
Correct Answer: B. Nucleus
Rationale: Prokaryotes do not have a membrane-bound nucleus.
,3. Eukaryotic cells have all the following except:
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Plasmids only
Correct Answer: D. Plasmids only
Rationale: Plasmids are common in prokaryotes, not typical in
eukaryotes.
4. Cell membranes are primarily composed of:
A. Proteins and lipids
B. Carbohydrates only
C. Nucleic acids
D. Polysaccharides
Correct Answer: A. Proteins and lipids
Rationale: The lipid bilayer with embedded proteins forms the
membrane structure.
5. The fluid mosaic model refers to:
A. Nuclear structure
B. Cell membrane structure
C. Cytoplasmic streaming
D. Golgi apparatus
Correct Answer: B. Cell membrane structure
,Rationale: Proteins float in a dynamic lipid bilayer, creating a
mosaic.
6. Which organelle is responsible for ATP production?
A. Lysosome
B. Mitochondria
C. Ribosome
D. Golgi apparatus
Correct Answer: B. Mitochondria
Rationale: Mitochondria produce energy via cellular respiration.
7. Ribosomes function in:
A. DNA replication
B. Protein synthesis
C. ATP production
D. Lipid metabolism
Correct Answer: B. Protein synthesis
Rationale: Ribosomes translate mRNA into polypeptides.
8. Rough endoplasmic reticulum is responsible for:
A. Lipid synthesis
B. Protein synthesis
C. Detoxification
D. DNA replication
, Correct Answer: B. Protein synthesis
Rationale: Ribosomes attached to the rough ER synthesize proteins.
9. Smooth ER functions in:
A. Detoxification and lipid synthesis
B. Protein folding
C. DNA replication
D. ATP production
Correct Answer: A. Detoxification and lipid synthesis
Rationale: Lacks ribosomes and produces lipids and metabolizes
toxins.
10. Golgi apparatus:
A. Synthesizes ATP
B. Modifies and packages proteins
C. Stores DNA
D. Synthesizes lipids
Correct Answer: B. Modifies and packages proteins
Rationale: Golgi sorts and directs proteins to their destinations.
11. Lysosomes contain:
A. DNA
B. Hydrolytic enzymes
C. Ribosomes
D. Lipids
