Which Four of the 92 Naturally Occurring Elements Make Up

question 31

Multiple Choice

Which four of the 92 naturally occurring elements make up approximately 96% of the mass of the human body?

• A)carbon,sodium,hydrogen,nitrogen
• B)carbon,oxygen,phosphorus,hydrogen
• C)oxygen,hydrogen,calcium,nitrogen
• D)carbon,hydrogen,nitrogen,oxygen
• E)carbon,oxygen,nitrogen,calcium

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Definitions:

Proto-Onco Gene

A normal gene which, when altered by mutation, becomes an oncogene that can contribute to cancer.

Epidermal Growth Factor

A protein that stimulates cell growth, proliferation, and differentiation by binding to its receptor, EGFR, on the cell surface.

Plasma Membrane

The double layer of lipids surrounding the cell's cytoplasm, controlling the entry and exit of materials to and from the cell.

Mitotic Spindle

A structure formed during cell division, composed of microtubules, which separates chromosomes into daughter cells ensuring accurate DNA distribution.