The Gridley stain uses:

a) periodic acid and methenamine silver
b) periodic acid and Schiff reagent
c) chromic acid and methenamine silver
d) chromic acid and Schiff reagent


Answer: d) chromic acid and Schiff reagent

Biology & Microbiology

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Which statement is TRUE?

A) Coenzymes and prosthetic groups both bind tightly to their respective enzymes. B) Prosthetic groups bind tightly to their respective enzymes. C) Coenzymes bind tightly to their respective enzymes. D) Coenzymes and prosthetic groups are technically not bound to their respective enzymes. E) None of the above

Biology & Microbiology

Steve Hubbell's work at Barro Colorado Island, Panama, points to which of the following as an impediment to the colonization of gaps by tree species?

A) lack of species capable of surviving in gaps B) competitive displacement C) dispersal limitation D) predation

Biology & Microbiology

A packet of nucleic acid enclosed in protein best describes a(n)

a. virus b. RNA molecule c. bacterium d. alga

Biology & Microbiology

How many stop codons are there in the genetic code?

A. five B. one C. four D. two E. three

Biology & Microbiology