Each amino acid is composed of a central carbon that forms covalent bonds with four other atoms/molecules. These atoms/molecules include each of the following EXCEPT which one?

A) an R group
B) an A group
C) an amino group
D) a hydrogen atom
E) a carboxyl group


B

Biology & Microbiology

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The infectious dose of most pathogens is about equal

Indicate whether this statement is true or false.

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Where do correlation, association, and learning occur in the brain?  

A.  cerebellum B.  corpus callosum C.  medulla D.  cerebrum E.  pons

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Which invention from the 17th century allowed for the development of modern cell theory?

A. X-rays B. computers C. the light microscope D. the scanning electron microscope

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Which substance is not a biofuel? a. Alcohols b. Gases c. None of these are biofuels

d. All of these are biofuels. e. Oils

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