A chemical substance that helps keep the pH from d

ATI RN

ATI RN Test Bank

A chemical substance that helps keep the pH from drastically changing is a(an)

A. acid B. base C. buffer D. isotope

Correct Answer: C

Rationale: Buffers resist pH changes by neutralizing added acids or bases.

Which of the following is NOT a function of proteins?

A. forming hormones B. forming monosaccharides C. forming transport molecules D. forming hair and nails

Correct Answer: B

Rationale: Proteins don't form monosaccharides (carbohydrates); they serve structural and functional roles.

The rungs of a DNA ladder are made of

A. alternating sugar and phosphate B. complementary base pairs C. alternating uracil and phosphate D. none of the above

Correct Answer: B

Rationale: DNA's rungs are base pairs (A-T, C-G); the backbone is sugar-phosphate.

Two or more layers of cube-shaped cells describes epithelial tissue.

A. simple cuboidal B. simple columnar C. stratified cuboidal D. stratified columnar

Correct Answer: C

Rationale: Stratified cuboidal epithelium has multiple layers of cube-shaped cells, e.g., in gland ducts.

Identify the types of fibers associated with connective tissue.

A. Collagen, elastic and reticular B. Collagen, elastic and keratin C. Collagen, keratin and reticular D. Elastic, keratin and reticular

Correct Answer: A

Rationale: Connective tissue fibers are collagen (strength), elastic (stretch), and reticular (support).

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