The process by which a less specialized cell matur

ATI RN

ATI RN Test Bank

The process by which a less specialized cell matures into a more specialized cell is called

A. differentiation B. maturation C. modification D. specialization

Correct Answer: A

Rationale: Differentiation is the process where unspecialized cells become specialized to perform specific functions.

The number of protons in an atom is given by the:

A. mass number B. atomic number C. difference between the atomic number and the mass number D. atomic weight

Correct Answer: B

Rationale: The atomic number defines the number of protons, unique to each element.

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).

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