Which of the following is a trace mineral?

A) iodine B) sodium C) phosphorus D) sulfur


Answer: A

Biology & Microbiology

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Which human protein do human skin fungal

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a. collagen b. elastin c. myosin d. keratin e. pepsin

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Most of the carbon dioxide produced by the body is transported to the lungs ____

a. in gaseous form b. in the lymph system c. as carbaminohemoglobin d. in the form of bicarbonate e. as carbonic acid

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Experimenters simulating early Earth conditions found that if heated protein chains were allowed to

cool in water, they would a. form nitrogen, which would escape as a gas. b. form proteinoids. c. form small, proteinlike molecules. d. clot and form a complex latticework frame for chemical reactions. e. break down into the original amino acids that the protein chain was made from.

Biology & Microbiology