Practice Questions

The building blocks of nucleic acids (DNA and RNA) are:

A. Amino acids

B. Monosaccharides

C. Fatty acids

D. Nucleotides ✓

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A protein that acts as a biological catalyst, speeding up the rate of specific biochemical reactions without being consumed in the process, is called an:

A. Hormone

B. Antibody

C. Enzyme ✓

D. Receptor

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A patient presents with symptoms of pellagra, including dermatitis, diarrhea, and dementia. This condition is caused by a deficiency of:

A. Vitamin B3 (Niacin) ✓

B. Vitamin B1 (Thiamine)

C. Vitamin B2 (Riboflavin)

D. Vitamin B6 (Pyridoxine)

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Jun 6, 2026

The process of breaking down glycogen into glucose-1-phosphate and then glucose for energy is called:

A. Glycogenesis

B. Glycolysis

C. Glycogenolysis ✓

D. Gluconeogenesis

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A substance that resists changes in pH when small amounts of acid or base are added is called a(n):

A. Salt

B. Indicator

C. Buffer ✓

D. Solvent

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Jun 6, 2026

A cellular process that involves the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration is:

A. Filtration

B. Active transport

C. Facilitated diffusion

D. Osmosis ✓

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Jun 6, 2026

A patient has a deficiency in a specific enzyme involved in the synthesis of a non-essential amino acid. Non-essential amino acids are those that:

A. Cannot be used for protein synthesis.

B. Must be obtained from the diet.

C. Can be synthesized by the human body. ✓

D. Are only found in animal products.

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Jun 6, 2026

The DNA double helix is stabilized by hydrogen bonds and hydrophobic interactions. The overall shape of the double helix is due to the coiling of two polynucleotide strands into a:

A. Beta-pleated sheet

B. Alpha-helix

C. Superhelix ✓

D. Parallel helix

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Jun 6, 2026

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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Jun 6, 2026

The process of synthesizing glycogen from glucose is called:

A. Glycogenolysis

B. Glycolysis

C. Glycogenesis ✓

D. Gluconeogenesis

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Practice Questions

The building blocks of nucleic acids (DNA and RNA) are:

A protein that acts as a biological catalyst, speeding up the rate of specific biochemical reactions without being consumed in the process, is called an:

A patient presents with symptoms of pellagra, including dermatitis, diarrhea, and dementia. This condition is caused by a deficiency of:

The process of breaking down glycogen into glucose-1-phosphate and then glucose for energy is called:

A substance that resists changes in pH when small amounts of acid or base are added is called a(n):

A cellular process that involves the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration is:

A patient has a deficiency in a specific enzyme involved in the synthesis of a non-essential amino acid. Non-essential amino acids are those that:

The DNA double helix is stabilized by hydrogen bonds and hydrophobic interactions. The overall shape of the double helix is due to the coiling of two polynucleotide strands into a:

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

The process of synthesizing glycogen from glucose is called:

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