Arsenic is toxic because it binds to the sulfhydryl group (-SH) in proteins and enzymes, leading to their denaturation and loss of function. It can also interfere with cellular processes that involve ATP production, but this is not the main mechanism of its toxicity. Arsenic is not an essential element in the human body and its use in cosmetics is discouraged due to its toxicity.

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Arsenic, As, Is

Question 29

Multiple Choice

Arsenic, As, is

A) an essential element in the human body.
B) toxic because it results in an increase in the production of ATP.
C) toxic because it binds to the sulfhydryl group in proteins and enzymes.
D) used in high concentrations in ancient cosmetics.
E) None of these choices is correct.

Correct Answer: