What molecule must be added to the media for a strain of bacteria auxotrophic for alanine to grow?

A) Alanine
B) Tryptophan
C) Hisitidine
D) Biotin


A) Alanine

Biology & Microbiology

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Cholesterol

a. has a rigid backbone of four carbon rings. b. is the most common steroid in animal tissue. c. is a lipid without a fatty-acid component. d. is needed to produce sexual development and maturity. e. is all of these.

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In an organism's binomial scientific name, the first of the two names is the

A) order. B) genus. C) species. D) family.

Biology & Microbiology

Graft rejection can be treated by preventing T cell responses with (azithroprine/cyclophosphamide/cyclosporine).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Intermediates in the breakdown of ____ can be

diverted into glycolysis and the Krebs cycle. a. carbohydrates b. lipids c. proteins d. all of these e. carbohydrates and lipids only

Biology & Microbiology