The source of nutrients in nutrient agar is

A) agar.
B) gelatin.
C) peptone and beef extract.
D) peptone and NaCl.
E) agar and NaCl.


C

Biology & Microbiology

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The LexA protein is:

A. the repressor of the SOS response. B. the coprotease for the cleavage of RecA protein. C. a DNA repair enzyme. D. a regulatory protein for the lac operon.

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What would be the most reasonable technique to use to determine if a drug is capable of inhibiting a transcription factor?

A. ChIP assay used with a DNA microarray B. Mass spectometry of proteins in the cell C. 2-D gel electrophoresis D. Antibody microarray

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Which of the following structures is NOT possessed by spiders?

A. cephalothorax B. pedicel C. pedipalps D. spinnerets E. antennae

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In cells, RNAs that can act like enzymes are called __________.

A. microRNAs B. peroxisomes C. ribozymes D. lysosomes

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