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Bio chemistry for nurses

164 questions found

Practice Questions

The backbone of a DNA strand is composed of alternating:

A. Amino acids and sugars

B. Phosphate groups and deoxyribose sugars ✓

C. Nitrogenous bases and phosphate groups

D. Fatty acids and glycerol

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Jun 6, 2026

A biochemist is studying a protein that functions as a channel across the cell membrane, allowing specific ions to pass through. This type of protein is primarily involved in:

A. Energy storage

B. Genetic information transfer

C. Transport ✓

D. Structural support

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Jun 6, 2026

The enzyme that catalyzes the breaking of a substrate by adding water is known as a(n):

A. Ligase

B. Isomerase

C. Hydrolase ✓

D. Transferase

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Jun 6, 2026

A patient with extreme malnutrition shows signs of severe muscle wasting. This indicates a significant breakdown of which macronutrient to provide energy?

A. Carbohydrates

B. Lipids

C. Proteins ✓

D. Nucleic acids

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Jun 6, 2026

A clinical assay measures the concentration of hydrogen ions in a solution. A solution with a low pH (e.g., pH 2) has a:

A. Low concentration of hydrogen ions

B. High concentration of hydrogen ions ✓

C. Neutral concentration of hydrogen ions

D. No hydrogen ions

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A deficiency in Vitamin B12 (Cobalamin) can lead to megaloblastic anemia and neurological problems. Vitamin B12 is essential for:

A. Collagen synthesis

B. Red blood cell maturation and nervous system function ✓

C. Vision

D. Calcium absorption

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Jun 6, 2026

The process of glucose phosphorylation, the first step in glycolysis, is catalyzed by:

A. Pyruvate kinase

B. Hexokinase ✓

C. Phosphofructokinase

D. Aldolase

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A type of RNA that carries specific amino acids to the ribosome during protein synthesis is:

A. mRNA

B. rRNA

C. tRNA ✓

D. siRNA

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Jun 6, 2026

The transfer of electrons from one molecule to another in a chemical reaction is known as a(n):

A. Hydrolysis reaction

B. Condensation reaction

C. Redox reaction ✓

D. Isomerization reaction

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Jun 6, 2026

A patient with a deficiency in a specific trace mineral experiences impaired thyroid hormone synthesis, leading to hypothyroidism. This mineral is:

A. Iron

B. Zinc

C. Iodine ✓

D. Calcium

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Jun 6, 2026

A lipid that acts as a messenger molecule and plays roles in inflammation, blood clotting, and smooth muscle contraction is:

A. Cholesterol

B. Triglyceride

C. Prostaglandin ✓

D. Phospholipid

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Jun 6, 2026

The primary function of carbohydrates in the human body is:

A. Structural support

B. Genetic information storage

C. Energy production ✓

D. Hormone synthesis

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Jun 6, 2026

A biochemist is studying the quaternary structure of a protein. This level of protein structure involves:

A. The sequence of amino acids.

B. The folding of a single polypeptide chain into an alpha-helix or beta-sheet.

C. The overall three-dimensional shape of a single polypeptide chain.

D. The arrangement of multiple polypeptide subunits into a functional complex. ✓

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Jun 6, 2026

The measure of acidity or alkalinity of a solution, based on the concentration of hydrogen ions, is expressed as:

A. Concentration

B. Molarity

C. pH ✓

D. Solubility

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A patient with a genetic condition has an impaired ability to synthesize certain lipoproteins, leading to issues with lipid transport in the blood. Lipoproteins are complexes of:

A. Carbohydrates and proteins

B. Lipids and proteins ✓

C. Nucleic acids and lipids

D. Proteins and minerals

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A metabolic process that uses energy to synthesize complex molecules from simpler ones is called:

A. Catabolism

B. Anabolism ✓

C. Metabolism

D. Respiration

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A competitive inhibitor of an enzyme will typically affect the enzyme’s:

A. Vmax? but not Km?

B. Km? but not Vmax? ✓

C. Both Vmax? and Km?

D. Neither Vmax? nor Km?

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A patient with prolonged jaundice has impaired fat absorption and develops bleeding tendencies. This is due to a deficiency in which fat-soluble vitamin crucial for blood clotting?

A. Vitamin A

B. Vitamin D

C. Vitamin E

D. Vitamin K ✓

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

A patient with a genetic defect cannot synthesize a specific enzyme. This defect would most directly impact the cell’s:

A. Structural integrity

B. Genetic information storage

C. Rate of specific biochemical reactions ✓

D. Water balance

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Jun 6, 2026

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Bio chemistry for nurses

Practice Questions

The backbone of a DNA strand is composed of alternating:

A biochemist is studying a protein that functions as a channel across the cell membrane, allowing specific ions to pass through. This type of protein is primarily involved in:

The enzyme that catalyzes the breaking of a substrate by adding water is known as a(n):

A patient with extreme malnutrition shows signs of severe muscle wasting. This indicates a significant breakdown of which macronutrient to provide energy?

A clinical assay measures the concentration of hydrogen ions in a solution. A solution with a low pH (e.g., pH 2) has a:

A deficiency in Vitamin B12 (Cobalamin) can lead to megaloblastic anemia and neurological problems. Vitamin B12 is essential for:

The process of glucose phosphorylation, the first step in glycolysis, is catalyzed by:

A type of RNA that carries specific amino acids to the ribosome during protein synthesis is:

The transfer of electrons from one molecule to another in a chemical reaction is known as a(n):

A patient with a deficiency in a specific trace mineral experiences impaired thyroid hormone synthesis, leading to hypothyroidism. This mineral is:

A lipid that acts as a messenger molecule and plays roles in inflammation, blood clotting, and smooth muscle contraction is:

The primary function of carbohydrates in the human body is:

A biochemist is studying the quaternary structure of a protein. This level of protein structure involves:

The measure of acidity or alkalinity of a solution, based on the concentration of hydrogen ions, is expressed as:

A patient with a genetic condition has an impaired ability to synthesize certain lipoproteins, leading to issues with lipid transport in the blood. Lipoproteins are complexes of:

A metabolic process that uses energy to synthesize complex molecules from simpler ones is called:

A competitive inhibitor of an enzyme will typically affect the enzyme’s:

A patient with prolonged jaundice has impaired fat absorption and develops bleeding tendencies. This is due to a deficiency in which fat-soluble vitamin crucial for blood clotting?

A patient with a genetic defect cannot synthesize a specific enzyme. This defect would most directly impact the cell’s:

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