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The final common pathway for the oxidation of carbohydrates, fats, and amino acids, generating ATP and carbon dioxide, is the:

A. Glycolysis
B. Pentose Phosphate Pathway
C. Electron Transport Chain
D. Krebs Cycle ✓
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Jun 6, 2026

A competitive inhibitor of an enzyme will typically:

A. Bind to an allosteric site.
B. Decrease the Vmax? of the reaction.
C. Increase the Km? of the reaction without affecting Vmax?. ✓
D. Irreversibly bind to the enzyme.
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Jun 6, 2026

The enzyme responsible for breaking down starch into smaller sugar molecules in the digestive tract is:

A. Lipase
B. Protease
C. Amylase ✓
D. Nuclease
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient with hypercholesterolemia needs to understand the role of cholesterol. Cholesterol is an important lipid that serves as a precursor for:

A. Amino acids
B. Glucose
C. Steroid hormones and vitamin D ✓
D. Fatty acids
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Jun 6, 2026

The process by which genetic information from a DNA strand is copied into an RNA molecule is known as:

A. Translation
B. Replication
C. Transcription ✓
D. Reverse transcription
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A cell membrane is described as a “fluid mosaic.” This model highlights that the membrane is primarily composed of:

A. Rigid carbohydrate layers
B. A static protein scaffold
C. A fluid bilayer of phospholipids with embedded proteins ✓
D. A rigid cholesterol monolayer
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Jun 6, 2026

A patient is experiencing severe metabolic alkalosis. To counteract this, the body might try to retain more carbon dioxide by:

A. Increasing respiratory rate.
B. Decreasing respiratory rate. ✓
C. Increasing bicarbonate excretion.
D. Increasing hydrogen ion excretion.
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A geneticist is studying a mutation that affects the sequence of amino acids in a protein. This change directly alters the protein’s:

A. Primary structure ✓
B. Secondary structure
C. Tertiary structure
D. Quaternary structure
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Jun 6, 2026

A protein loses its specific three-dimensional structure and function due to extreme changes in temperature or pH. This process is called:

A. Hydrolysis
B. Polymerization
C. Denaturation ✓
D. Renaturation
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A person has been fasting for an extended period. The body needs to maintain blood glucose levels for brain function. The synthesis of glucose from non-carbohydrate precursors (like amino acids and glycerol) is called:

A. Glycogenesis
B. Glycogenolysis
C. Gluconeogenesis ✓
D. Glycolysis
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A biochemist is studying the properties of water. They note that water’s high specific heat capacity and ability to absorb significant amounts of heat without a large temperature change are due to:

A. Its nonpolar nature
B. The presence of ionic bonds
C. Extensive hydrogen bonding between water molecules ✓
D. Its low boiling point
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient with severe liver disease has impaired ability to convert ammonia, a toxic byproduct of amino acid metabolism, into urea. This process is vital for detoxification and occurs in the:

A. Glycolysis pathway
B. Krebs Cycle
C. Urea Cycle ✓
D. Pentose Phosphate Pathway
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A molecular biologist is performing PCR (Polymerase Chain Reaction). They need to separate the two strands of DNA by heating. This process, which disrupts hydrogen bonds but not covalent bonds, is known as:

A. Renaturation
B. Hybridization
C. Denaturation ✓
D. Replication
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient is suffering from a condition where blood clots form easily. Vitamin K plays a crucial role in the synthesis of several blood clotting factors. This is an example of a vitamin acting as a:

A. Structural component
B. Energy source
C. Coenzyme ✓
D. Hormone
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A nutritionist is explaining the difference between saturated and unsaturated fatty acids. Unsaturated fatty acids are characterized by:

A. Only single bonds between carbon atoms.
B. The presence of one or more carbon-carbon double bonds. ✓
C. Being solid at room temperature.
D. Being found predominantly in animal fats.
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

During cellular respiration, glucose is fully oxidized to carbon dioxide and water, releasing a large amount of energy. The initial stage of glucose breakdown, occurring in the cytoplasm and not requiring oxygen, is called:

A. Electron Transport Chain
B. Krebs Cycle
C. Glycolysis ✓
D. Gluconeogenesis
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient is diagnosed with a metabolic disorder characterized by the accumulation of a specific lipid in various tissues. A crucial component of biological membranes, forming a bilayer, is the:

A. Triglyceride
B. Cholesterol
C. Phospholipid ✓
D. Fatty acid
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Jun 6, 2026

A laboratory technician is preparing a solution for a cell culture experiment. They need to maintain a stable pH within the solution. To achieve this, they would add a:

A. Strong acid
B. Strong base
C. Buffer ✓
D. Neutral salt
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Jun 6, 2026

A cell requires constant energy for active transport. The primary source of this energy for most cellular processes is the hydrolysis of which molecule?

A. Glucose
B. Fatty acids
C. ATP ✓
D. ADP
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Jun 6, 2026
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