BIOS 150 Week 4 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What type of bond holds amino acids together?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Covalent bond
Correct Answer: C
Rationale:Peptide bonds link amino acids to form proteins.
2. Which structure determines protein function?
A. Primary structure
B. Secondary structure
C. Tertiary structure
D. All of the above
Correct Answer: D
Rationale:All levels of structure influence protein function.
,3. What causes protein denaturation?
A. Cold temperature
B. Heat or pH change
C. Oxygen
D. Water
Correct Answer: B
Rationale:Extreme conditions disrupt protein structure.
4. What is an enzyme?
A. Lipid
B. Carbohydrate
C. Biological catalyst
D. DNA
Correct Answer: C
Rationale:Enzymes speed up biochemical reactions.
5. What is the active site of an enzyme?
A. Binding region for substrate
B. DNA region
C. Membrane
D. Energy source
Correct Answer: A
Rationale:Substrate binds at the enzyme’s active site.
6. What is substrate specificity?
,A. Enzyme works with many substrates
B. Enzyme works with one specific substrate
C. No reaction
D. Random reaction
Correct Answer: B
Rationale:Enzymes are specific to their substrates.
7. What happens when enzyme is inhibited?
A. Reaction speeds up
B. Reaction slows or stops
C. Protein forms
D. DNA replicates
Correct Answer: B
Rationale:Inhibitors reduce enzyme activity.
8. Competitive inhibition involves:
A. Binding elsewhere
B. Competing for active site
C. Destroying enzyme
D. Adding ATP
Correct Answer: B
Rationale:Inhibitor competes with substrate.
9. Non-competitive inhibition involves:
, A. Active site binding
B. Other site binding
C. DNA binding
D. Ribosome
Correct Answer: B
Rationale:Inhibitor binds outside active site.
10. What is metabolism?
A. Energy loss
B. All chemical reactions in body
C. Digestion only
D. Respiration only
Correct Answer: B
Rationale:Metabolism includes all reactions in organisms.
11. Catabolism involves:
A. Building molecules
B. Breaking molecules
C. DNA replication
D. Growth only
Correct Answer: B
Rationale:Catabolism releases energy.
12. Anabolism involves:
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What type of bond holds amino acids together?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Covalent bond
Correct Answer: C
Rationale:Peptide bonds link amino acids to form proteins.
2. Which structure determines protein function?
A. Primary structure
B. Secondary structure
C. Tertiary structure
D. All of the above
Correct Answer: D
Rationale:All levels of structure influence protein function.
,3. What causes protein denaturation?
A. Cold temperature
B. Heat or pH change
C. Oxygen
D. Water
Correct Answer: B
Rationale:Extreme conditions disrupt protein structure.
4. What is an enzyme?
A. Lipid
B. Carbohydrate
C. Biological catalyst
D. DNA
Correct Answer: C
Rationale:Enzymes speed up biochemical reactions.
5. What is the active site of an enzyme?
A. Binding region for substrate
B. DNA region
C. Membrane
D. Energy source
Correct Answer: A
Rationale:Substrate binds at the enzyme’s active site.
6. What is substrate specificity?
,A. Enzyme works with many substrates
B. Enzyme works with one specific substrate
C. No reaction
D. Random reaction
Correct Answer: B
Rationale:Enzymes are specific to their substrates.
7. What happens when enzyme is inhibited?
A. Reaction speeds up
B. Reaction slows or stops
C. Protein forms
D. DNA replicates
Correct Answer: B
Rationale:Inhibitors reduce enzyme activity.
8. Competitive inhibition involves:
A. Binding elsewhere
B. Competing for active site
C. Destroying enzyme
D. Adding ATP
Correct Answer: B
Rationale:Inhibitor competes with substrate.
9. Non-competitive inhibition involves:
, A. Active site binding
B. Other site binding
C. DNA binding
D. Ribosome
Correct Answer: B
Rationale:Inhibitor binds outside active site.
10. What is metabolism?
A. Energy loss
B. All chemical reactions in body
C. Digestion only
D. Respiration only
Correct Answer: B
Rationale:Metabolism includes all reactions in organisms.
11. Catabolism involves:
A. Building molecules
B. Breaking molecules
C. DNA replication
D. Growth only
Correct Answer: B
Rationale:Catabolism releases energy.
12. Anabolism involves:
