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A biochemist is studying an enzyme whose activity is regulated by phosphorylation and dephosphorylation. This type of regulation is known as:

A. Allosteric regulation

B. Covalent modification ✓

C. Feedback inhibition

D. Zymogen activation

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The process of synthesizing glycogen from glucose is called:

A. Glycogenolysis

B. Glycolysis

C. Glycogenesis ✓

D. Gluconeogenesis

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A patient with malabsorption syndrome is unable to absorb fat-soluble vitamins. Which of the following vitamins are considered fat-soluble?

A. Vitamin B complex and Vitamin C

B. Vitamin A, D, E, K ✓

C. Folic acid and Biotin

D. Thiamine and Riboflavin

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A patient with a deficiency in a certain vitamin develops night blindness. This symptom is associated with a deficiency in:

A. Vitamin C

B. Vitamin A ✓

C. Vitamin B12

D. Vitamin D

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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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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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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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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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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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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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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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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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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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A person is on a low-fat diet. They still need to obtain essential fatty acids. Essential fatty acids are those that:

A. Are saturated fats.

B. Are synthesized by the body.

C. Must be obtained from the diet because the body cannot synthesize them. ✓

D. Are found only in animal products.

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The bonds that link amino acids together to form polypeptide chains are called:

A. Glycosidic bonds

B. Ester bonds

C. Peptide bonds ✓

D. Phosphodiester bonds

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A genetic mutation leads to a change in a single nucleotide in the DNA sequence, but it does not change the amino acid sequence of the protein. This type of mutation is called a:

A. Missense mutation

B. Nonsense mutation

C. Silent mutation ✓

D. Frameshift mutation

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A patient is experiencing rapid, shallow breathing. This could be a compensatory mechanism for:

A. Metabolic alkalosis

B. Respiratory acidosis

C. Metabolic acidosis ✓

D. Respiratory alkalosis

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The process of breaking down complex molecules into simpler ones, usually releasing energy, is called:

A. Anabolism

B. Catabolism ✓

C. Metabolism

D. Homeostasis

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A biochemist is studying the movement of molecules across a cell membrane against their concentration gradient, requiring energy input. This process is known as:

A. Simple diffusion

B. Facilitated diffusion

C. Osmosis

D. Active transport ✓

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BS Nursing

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Practice Questions

A biochemist is studying an enzyme whose activity is regulated by phosphorylation and dephosphorylation. This type of regulation is known as:

The process of synthesizing glycogen from glucose is called:

A patient with malabsorption syndrome is unable to absorb fat-soluble vitamins. Which of the following vitamins are considered fat-soluble?

A patient with a deficiency in a certain vitamin develops night blindness. This symptom is associated with a deficiency in:

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

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

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

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

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

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

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

A competitive inhibitor of an enzyme will typically:

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

A person is on a low-fat diet. They still need to obtain essential fatty acids. Essential fatty acids are those that:

The bonds that link amino acids together to form polypeptide chains are called:

A genetic mutation leads to a change in a single nucleotide in the DNA sequence, but it does not change the amino acid sequence of the protein. This type of mutation is called a:

A patient is experiencing rapid, shallow breathing. This could be a compensatory mechanism for:

The process of breaking down complex molecules into simpler ones, usually releasing energy, is called:

A biochemist is studying the movement of molecules across a cell membrane against their concentration gradient, requiring energy input. This process is known as:

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