Upon completion of DNA replication, the new molecu

ATI RN

ATI RN Test Bank

Upon completion of DNA replication, the new molecule of DNA consists of:

A. two new strands of DNA B. two old strands of DNA C. one old strand and one new strand of DNA D.

Correct Answer: C

Rationale: DNA replication is semi-conservative, with each new molecule having one old and one new strand.

The smallest unit of an element that has all the properties of that element is a(an):

A. atom B. gas C. molecule D. isotope

Correct Answer: A

Rationale: An atom is the smallest unit retaining an element's chemical properties.

Particles that have either a positive or a negative charge are called:

A. reactions B. ions C. compound D. molecule

Correct Answer: B

Rationale: Ions are atoms or molecules with a net charge due to electron gain or loss.

A solution with a pH of 3 would be:

A. acidic B. basic C. neutral D.

Correct Answer: A

Rationale: pH < 7 indicates an acidic solution (high H+ concentration).

Identify the macromolecule that has a 2:1 ratio of hydrogen to oxygen atoms.

A. Carbohydrates B. Lipids C. Nucleic acids D. Proteins

Correct Answer: A

Rationale: Carbohydrates (e.g., C6H12O6) have a 2:1 H:O ratio.

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