You are growing Bacillus subtilis, an aerobic bacterium that can also carry out fermentation when required, in a bioreactor and notice that the growth rate has slowed and the pH has decreased. What could you add?
A) glucose
B) lactose
C) peptides
D) oxygen
E) lactic acid
D
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Propionibacterium
A. produces propionic acid. B. produces lactic acid. C. is responsible for the holes in Swiss cheese. D. requires aerobic environments. E. produces propionic acid AND is responsible for the holes in Swiss cheese.
Which region(s) of the ribosome accept(s) charged tRNA molecules during the elongation phase of translation?
a. the A site b. the A site or the E site c. the P site d. the P site or the E site e. the E site
Plant cells assimilate nitrogen in the form of:
a. ammonia and N2 b. N2 and nitrite c. nitrate and ammonia d. urea and nitrate e. N2 and urea
Shown below is the output from an automated sequencing reaction. What is the sequence of the DNA template strand? 
A. 5' - CACCGTAAGGACTG - 3' B. 3' - CACCGTAAGGACTG - 5' C. 5' - GTGGCATTCCTGAC - 3' D. 3' - GTGGCATTCCTGAC - 5' E. 5' - GTGGCATTCCTGAC - 3' 3' - GTGGCATTCCTGAC - 5'