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Bio chemistry for nurses

164 questions found

Practice Questions

A lipid that is the primary component of cell membranes and forms a bilayer due to its amphipathic nature (having both hydrophilic and hydrophobic parts) is:

A. Triglyceride

B. Cholesterol

C. Phospholipid ✓

D. Sphingolipid

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Jun 6, 2026

The metabolic pathway that generates ATP from glucose under anaerobic conditions, producing pyruvate and a small amount of ATP, is:

A. Krebs Cycle

B. Oxidative Phosphorylation

C. Glycolysis ✓

D. Beta-oxidation

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Jun 6, 2026

A genetic mutation results in a premature stop codon in the mRNA sequence, leading to a truncated, non-functional protein. This type of mutation is called a:

A. Silent mutation

B. Missense mutation

C. Nonsense mutation ✓

D. Frameshift mutation

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Jun 6, 2026

A patient presents with beriberi, characterized by neurological and cardiovascular symptoms. 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

A substance that has both hydrophilic and hydrophobic properties is described as:

A. Polar

B. Nonpolar

C. Amphipathic ✓

D. Hydrophobic

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nmdcat.online Bio chemistry for nurses

Jun 6, 2026

The process of DNA replication is considered semiconservative because:

A. Both new strands are composed entirely of new nucleotides.

B. Both original strands are entirely preserved.

C. Each new DNA molecule consists of one original strand and one newly synthesized strand. ✓

D. Replication occurs in a linear fashion.

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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 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

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 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

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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Jun 6, 2026

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

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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Jun 6, 2026

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

A. Amino acids

B. Monosaccharides

C. Fatty acids

D. Nucleotides ✓

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Jun 6, 2026

The optimal pH for most human enzymes is approximately:

A. 2

B. 7.4 ✓

C. 9

D. 12

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Jun 6, 2026

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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Jun 6, 2026

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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Jun 6, 2026

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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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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Jun 6, 2026

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Bio chemistry for nurses

Practice Questions

A lipid that is the primary component of cell membranes and forms a bilayer due to its amphipathic nature (having both hydrophilic and hydrophobic parts) is:

The metabolic pathway that generates ATP from glucose under anaerobic conditions, producing pyruvate and a small amount of ATP, is:

A genetic mutation results in a premature stop codon in the mRNA sequence, leading to a truncated, non-functional protein. This type of mutation is called a:

A patient presents with beriberi, characterized by neurological and cardiovascular symptoms. This condition is caused by a deficiency of:

A substance that has both hydrophilic and hydrophobic properties is described as:

The process of DNA replication is considered semiconservative because:

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

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

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

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:

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

The optimal pH for most human enzymes is approximately:

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

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

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?

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