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Practice Questions

A solution with a pH of 8.0 is considered:

A. Acidic
B. Neutral
C. Basic (alkaline) ✓
D. Strongly acidic
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

The most abundant organic molecule in cells, crucial for structural support, catalysis, transport, and regulation, is:

A. Carbohydrates
B. Lipids
C. Proteins ✓
D. Nucleic acids
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient with impaired fatty acid oxidation due to a genetic defect may have difficulty generating ATP from fats, leading to muscle weakness and fatigue, especially during fasting. This pathway is called:

A. Glycolysis
B. Beta-oxidation ✓
C. Lipogenesis
D. Ketogenesis
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

The Km value of an enzyme is a measure of its:

A. Maximum velocity
B. Catalytic efficiency
C. Affinity for its substrate ✓
D. Stability at different temperatures
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A common polysaccharide found in plants that serves as the primary energy storage molecule for plants and is a major source of dietary carbohydrates for humans is:

A. Glycogen
B. Cellulose
C. Starch ✓
D. Chitin
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

The molecule that links the major catabolic pathways (like glycolysis, beta-oxidation) to the Krebs Cycle is:

A. Pyruvate
B. Lactate
C. Acetyl-CoA ✓
D. Glucose
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient with liver cirrhosis has impaired ability to synthesize albumin. Albumin is a major plasma protein primarily responsible for maintaining:

A. Blood clotting
B. Oxygen transport
C. Osmotic pressure and fluid balance ✓
D. Immune response
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A molecular biologist is examining the components of a ribosome. They identify a type of RNA that is a major structural and catalytic component of ribosomes, playing a crucial role in protein synthesis. This is:

A. mRNA
B. tRNA
C. rRNA ✓
D. siRNA
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

The process of glucose being broken down to pyruvate in the presence of oxygen, leading to further oxidation in the mitochondria, is the first step of:

A. Anaerobic respiration
B. Aerobic respiration ✓
C. Fermentation
D. Gluconeogenesis
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient has a genetic condition affecting the synthesis of a vitamin, leading to symptoms of megaloblastic anemia. This condition often results from a deficiency in:

A. Vitamin C
B. Folic Acid ✓
C. Vitamin A
D. Vitamin D
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026
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