A molecule comprised to two amino acids is called

ATI RN

ATI RN Test Bank

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.

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.

Identify the function of microvilli.

A. Aid in absorption B. Move materials past cells C. Provides a waterproof barrier D. Secrete mucous

Correct Answer: A

Rationale: Microvilli increase surface area on columnar cells for enhanced absorption (e.g., intestines).

Fibrocartilage is found:

A. between the ribs and sternum B. in the outer ear C. on the roof of the mouth D. between the vertebrae

Correct Answer: D

Rationale: Fibrocartilage, strong and shock-absorbing, is in intervertebral discs.

What type of muscle tissue is found in the walls of hollow internal organs?

A. skeletal B. smooth C. cardiac D.

Correct Answer: B

Rationale: Smooth muscle lines hollow organs (e.g., gut, blood vessels) for involuntary movement.

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