In bone, the main cells are

ATI RN

ATI RN Test Bank

A. fibroblasts B. chondrocytes C. lymphocytes D. osteocytes

Correct Answer: D

Rationale: Osteocytes are the primary cells in bone, maintaining the bone matrix.

Deoxyribonucleotides are named according to:

A. the base B. the sugar C. the phosphate group D. their position in the macromolecule

Correct Answer: A

Rationale: Deoxyribonucleotides (e.g., dATP) are named by their nitrogenous base (adenine, thymine, etc.).

The plasma membrane serves to:

A. enclose components of the cell B. regulate absorption C. give shape to the cell D. all of the above

Correct Answer: D

Rationale: The plasma membrane encloses, regulates transport, and shapes the cell.

The sequence of nucleotides in a messenger RNA molecule is determined by the:

A. sequence of nucleotides in a gene B. enzyme RNA polymerase C. sequence of amino acids in a protein D. enzyme ribonuclease (RNase)

Correct Answer: A

Rationale: mRNA sequence is a copy of a gene's DNA sequence (complementary to the template strand).

Classification of epithelia is based on the number of layers of cells and on the:

A. shape B. staining properties C. size D. location

Correct Answer: A

Rationale: Epithelia are classified by layers (simple/stratified) and cell shape (squamous, cuboidal, columnar).

$89/ 30 days

$150/ 90 days