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
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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
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
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
______________ 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).