MCQs

11262 questions found

Practice Questions

The process of glucose being synthesized from glycogen is known as:

A. Glycolysis

B. Glycogenolysis

C. Glycogenesis ✓

D. Gluconeogenesis

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Jun 6, 2026

A patient presents with generalized edema due to low plasma protein levels. This illustrates the importance of proteins in maintaining:

A. Blood clotting.

B. Oxygen transport.

C. Osmotic pressure and fluid balance. ✓

D. Immune response.

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Jun 6, 2026

The minimum amount of energy required to initiate a chemical reaction is called the:

A. Free energy

B. Activation energy ✓

C. Binding energy

D. Kinetic energy

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Jun 6, 2026

The type of bond that connects glycerol to fatty acids in a triglyceride is an:

A. Peptide bond

B. Glycosidic bond

C. Ester bond ✓

D. Hydrogen bond

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Jun 6, 2026

A patient with a genetic condition impacting the production of a particular enzyme involved in the synthesis of a non-essential amino acid may still be able to obtain it from their diet. This highlights the concept of:

A. Essential nutrients. ✓

B. Nutritional redundancy.

C. Dietary flexibility.

D. Metabolic adaptation.

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Jun 6, 2026

A molecule that acts as a reducing agent in biochemical reactions (donates electrons) is said to be:

A. Oxidized ✓

B. Reduced

C. Hydrolyzed

D. Phosphorylated

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Jun 6, 2026

The structural carbohydrate that provides rigidity to the cell walls of plants and is a component of dietary fiber is:

A. Starch

B. Glycogen

C. Cellulose ✓

D. Lactose

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Jun 6, 2026

A competitive inhibitor’s effect on an enzyme can typically be overcome by:

A. Increasing temperature.

B. Decreasing substrate concentration.

C. Increasing substrate concentration. ✓

D. Decreasing enzyme concentration.

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Jun 6, 2026

A deficiency in Vitamin D can impair calcium absorption, leading to weakened bones. Vitamin D’s primary role in bone health is to:

A. Directly strengthen bones.

B. Stimulate osteoclast activity.

C. Promote calcium and phosphate absorption in the intestine. ✓

D. Promote protein synthesis.

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

The primary function of the electron transport chain in cellular respiration is to:

A. Synthesize glucose.

B. Produce lactate.

C. Generate a proton gradient to drive ATP synthesis. ✓

D. Break down fatty acids.

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Jun 6, 2026

The nitrogenous base common to both DNA and RNA is:

A. Thymine

B. Uracil

C. Adenine

D. Guanine ✓

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Jun 6, 2026

A solution with a high concentration of hydrogen ions will have a:

A. High pH

B. Low pH ✓

C. Neutral pH

D. Variable pH

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Jun 6, 2026

A protein that exists as a complex of multiple polypeptide chains (e.g., hemoglobin with four subunits) exhibits which level of protein structure?

A. Primary

B. Secondary

C. Tertiary

D. Quaternary ✓

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Jun 6, 2026

The enzyme that catalyzes the final step of the electron transport chain, transferring electrons to oxygen to form water, is:

A. ATP synthase

B. Cytochrome c oxidase ✓

C. NADH dehydrogenase

D. Succinate dehydrogenase

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Jun 6, 2026

A patient with a diet very low in carbohydrates may enter a state where the body produces ketone bodies from fatty acid breakdown to use as an alternative energy source. This process is called:

A. Glycolysis

B. Lipogenesis

C. Ketogenesis ✓

D. Gluconeogenesis

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Jun 6, 2026

The process of joining two smaller molecules together to form a larger one, typically removing a water molecule, is called:

A. Hydrolysis

B. Condensation (dehydration synthesis) ✓

C. Oxidation

D. Reduction

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Jun 6, 2026

A patient with a genetic defect in a mitochondrial enzyme cannot perform the Krebs Cycle efficiently. This would severely impair the cell’s ability to produce:

A. Glucose

B. Fatty acids

C. Large amounts of ATP aerobically ✓

D. Lactic acid

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Jun 6, 2026

The metabolic pathway that breaks down glucose into two molecules of pyruvate, generating a small amount of ATP and NADH, is:

A. Krebs Cycle

B. Oxidative phosphorylation

C. Glycolysis ✓

D. Gluconeogenesis

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A protein’s secondary structure involves localized folding patterns like alpha-helices and beta-pleated sheets, which are primarily stabilized by:

A. Covalent bonds

B. Ionic bonds

C. Hydrogen bonds between backbone atoms ✓

D. Disulfide bonds

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Jun 6, 2026

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MCQs

Practice Questions

The process of glucose being synthesized from glycogen is known as:

A patient presents with generalized edema due to low plasma protein levels. This illustrates the importance of proteins in maintaining:

The minimum amount of energy required to initiate a chemical reaction is called the:

The type of bond that connects glycerol to fatty acids in a triglyceride is an:

A patient with a genetic condition impacting the production of a particular enzyme involved in the synthesis of a non-essential amino acid may still be able to obtain it from their diet. This highlights the concept of:

A molecule that acts as a reducing agent in biochemical reactions (donates electrons) is said to be:

The structural carbohydrate that provides rigidity to the cell walls of plants and is a component of dietary fiber is:

A competitive inhibitor’s effect on an enzyme can typically be overcome by:

A deficiency in Vitamin D can impair calcium absorption, leading to weakened bones. Vitamin D’s primary role in bone health is to:

The primary function of the electron transport chain in cellular respiration is to:

The nitrogenous base common to both DNA and RNA is:

A solution with a high concentration of hydrogen ions will have a:

A protein that exists as a complex of multiple polypeptide chains (e.g., hemoglobin with four subunits) exhibits which level of protein structure?

The enzyme that catalyzes the final step of the electron transport chain, transferring electrons to oxygen to form water, is:

A patient with a diet very low in carbohydrates may enter a state where the body produces ketone bodies from fatty acid breakdown to use as an alternative energy source. This process is called:

The process of joining two smaller molecules together to form a larger one, typically removing a water molecule, is called:

A patient with a genetic defect in a mitochondrial enzyme cannot perform the Krebs Cycle efficiently. This would severely impair the cell’s ability to produce:

The metabolic pathway that breaks down glucose into two molecules of pyruvate, generating a small amount of ATP and NADH, is:

A protein’s secondary structure involves localized folding patterns like alpha-helices and beta-pleated sheets, which are primarily stabilized by:

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