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
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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.
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
Which of the following structures is NOT possessed by spiders?
A. cephalothorax B. pedicel C. pedipalps D. spinnerets E. antennae
In cells, RNAs that can act like enzymes are called __________.
A. microRNAs B. peroxisomes C. ribozymes D. lysosomes