Which fluorescent molecule enables visualization of living microorganisms?

A) acridine orange
B) DAPI
C) GFP
D) SYBR ® Green


Answer: C

Biology & Microbiology

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Refer to Figure 41-2. Which of the following would have an effect on the structure in part 1?


a. potassium concentration
b. chloride concentration
c. neurotoxin
d. tetrodotoxin
e. provocain

Biology & Microbiology

Once a hormone activates the enzyme adenylyl cyclase, ATP is converted to cAMP, which in turn:a

activates protein kinase. b. inhibits phosphodiesterase. c. initiates more cAMP production. d. initiates protein synthesis. e. inhibits protein synthesis.

Biology & Microbiology

Melvin Calvin and his colleagues used which of the following to deduce the steps in the Calvin-Benson cycle?

A) negative staining B) Drosophila melanogaster C) electron microscopy D) ultracentrifugation E) radioisotopes

Biology & Microbiology

What produces gene flow?

A) mating between populations B) geographical isolation C) mutation D) speciation

Biology & Microbiology