A double covalent bond occurs when two atoms share

ATI RN

ATI RN Test Bank

A double covalent bond occurs when two atoms share:

A. 2 electrons B. 2 pairs of electrons C. 2 neutrons D. 2 pairs of neutrons

Correct Answer: B

Rationale: A double covalent bond involves sharing 4 electrons (2 pairs), e.g., O2.

The result from the hydrolysis of a disaccharide is:

A. a polysaccharide B. two amino acids C. two monosaccharides D. two nucleotides

Correct Answer: C

Rationale: Hydrolysis of a disaccharide (e.g., sucrose) yields two monosaccharides (glucose + fructose).

A molecule comprised to two amino acids is called a(n):

A. dipeptide B. disaccharide C. polypeptide D. protein

Correct Answer: A

Rationale: A dipeptide is two amino acids linked by a peptide bond.

A dehydration synthesis reaction used to make proteins is also called

A. synthesis B. degradation C. decomposition D. replacement

Correct Answer: A

Rationale: Dehydration synthesis links amino acids into proteins, releasing water.

Identify the major tissue type that consists of cells tightly packed and always has a free surface.

A. Connective tissue B. Epithelial tissue C. Muscle tissue D. Nervous tissue

Correct Answer: B

Rationale: Epithelial tissue has tightly packed cells with a free (apical) surface and basement membrane.

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