The adenylation of DNA ligase is:

A. an unstable initial step in the reaction.
B. occurs at a lysine residue in the DNA binding domain.
C. dependent on the presence of DNA.
D. independent of the presence of DNA.
E. more efficient at lower pH.


D

Biology & Microbiology

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Bdellovibrio species are ________ cells that replicate in the ________

A) symbiotic / gills of clams B) lithotrophic / deep subsurface C) predatory / periplasmic space D) denitrifying / sediments of freshwater lakes

Biology & Microbiology

The organelle featured in Figure 4-3:



a. is present in a few prokaryotes.
b. is the major site of protein synthesis in the cell.
c. plays a vital role in packaging materials to be secreted.
d. plays a central role in energy metabolism.
e. is located in the nucleus

Biology & Microbiology

All living things are able to maintain stable internal conditions, whether they are unicellular or complex, multicellular organisms. This property is called:

A. homeostasis B. cellular organization C. metabolism D. heredity

Biology & Microbiology

______________ refers to a procedure in which an individual exposed to a lethal agent receives antibodies purified from the blood of another for immediate benefit.

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

Biology & Microbiology