AFOQT AFOQT General Science Biology and Chemistry 3

Question 1

Which vitamin is synthesized in human skin upon exposure to ultraviolet light?

Accepted Answer

Vitamin D

Answer

UV-B radiation triggers synthesis of Vitamin D3 in skin cells from a cholesterol precursor molecule.

Question 2

The study of heredity and the variation of inherited characteristics is called:

Accepted Answer

Genetics

Answer

Genetics examines how traits encoded in genes are passed from parents to offspring and how they vary.

Question 3

Which part of the human nervous system controls involuntary functions such as heart rate and digestion?

Accepted Answer

Autonomic nervous system

Answer

The autonomic nervous system regulates involuntary functions through its sympathetic and parasympathetic divisions.

Question 4

Elements in the same group (column) of the periodic table share:

Accepted Answer

Similar chemical properties

Answer

Elements in the same group have identical numbers of valence electrons, producing similar chemical reactivity.

Question 5

The process of cell division that produces two genetically identical diploid daughter cells is:

Accepted Answer

Mitosis

Answer

Mitosis produces two genetically identical cells with the same chromosome number and is used for growth and tissue repair.

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