Practice Questions

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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Jun 6, 2026

A patient with severe iron deficiency anemia is unable to transport sufficient oxygen in their blood. Iron is a crucial component of which protein in red blood cells?

A. Myoglobin

B. Hemoglobin ✓

C. Albumin

D. Immunoglobulin

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A student is confused about the difference between monosaccharides and disaccharides. An example of a disaccharide, formed from two monosaccharides, is:

A. Glucose

B. Fructose

C. Galactose

D. Sucrose (table sugar) ✓

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A metabolic pathway that involves the breakdown of fatty acids into acetyl-CoA, which can then enter the Krebs Cycle, is called:

A. Glycolysis

B. Beta-oxidation ✓

C. Lipogenesis

D. Gluconeogenesis

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A nucleic acid that acts as a temporary copy of a gene and carries genetic information from DNA to the ribosome for protein synthesis is:

A. tRNA

B. rRNA

C. mRNA ✓

D. DNA

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The optimal pH for most human enzymes is approximately:

A. 2

B. 7.4 ✓

C. 9

D. 12

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A patient with a protein deficiency exhibits poor wound healing and weakened immune response. This highlights the diverse functions of proteins, including their role as:

A. Energy storage molecules

B. Genetic information carriers

C. Structural components and enzymes ✓

D. Primary components of cell membranes

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A cell requires a large amount of ATP and has numerous cristae in its mitochondria. This indicates high activity in which metabolic pathway?

A. Glycolysis

B. Electron Transport Chain and Oxidative Phosphorylation ✓

C. Pentose Phosphate Pathway

D. Fatty acid synthesis

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A lipid derived from cholesterol that is involved in emulsifying dietary fats in the small intestine is:

A. Triglyceride

B. Phospholipid

C. Bile acid ✓

D. Prostaglandin

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The process by which the genetic information encoded in mRNA is used to synthesize a protein is called:

A. Replication

B. Transcription

C. Translation ✓

D. Reverse transcription

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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:

A patient with severe iron deficiency anemia is unable to transport sufficient oxygen in their blood. Iron is a crucial component of which protein in red blood cells?

A student is confused about the difference between monosaccharides and disaccharides. An example of a disaccharide, formed from two monosaccharides, is:

A metabolic pathway that involves the breakdown of fatty acids into acetyl-CoA, which can then enter the Krebs Cycle, is called:

A nucleic acid that acts as a temporary copy of a gene and carries genetic information from DNA to the ribosome for protein synthesis is:

The optimal pH for most human enzymes is approximately:

A patient with a protein deficiency exhibits poor wound healing and weakened immune response. This highlights the diverse functions of proteins, including their role as:

A cell requires a large amount of ATP and has numerous cristae in its mitochondria. This indicates high activity in which metabolic pathway?

A lipid derived from cholesterol that is involved in emulsifying dietary fats in the small intestine is:

The process by which the genetic information encoded in mRNA is used to synthesize a protein is called:

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