The science of microbial ecology deals with
A) how microbial communities interact with each other and their environment.
B) microbial activity and biodiversity.
C) microbial gene regulation mechanisms in response to environmental change.
D) how the activity and biodiversity of microbial communities affect microbial interactions with each other and the environment.
Answer: D
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Which regulatory mechanism is important in keeping glycolysis and the citric acid cycle in relative balance to each other?
A. Citrate inhibits phosphofructokinase 1. B. ADP up-regulates phosphofructokinase 1. C. ATP inhibits phosphofructokinase 1. D. AMP inhibits phosphofructokinase 1.
The C-terminus of a polypeptide always contains
A. a stop codon. B. a carboxyl group C. an amino group. D. carbon dioxide. E. None of the answers are correct.
What represents a nonionizing form of radiation, often used for disinfection purposes?
A. UV radiation B. X rays C. Gamma rays D. Cathode rays
Dinoflagellates are important to coral and coral-dwelling animals because they
A) provide energy in the form of organic molecules that is used by coral animals. B) provide shelter for the fast-growing seaweeds associated with coral. C) produce carbon dioxide (CO2 ) and nitrogen for coral. D) are toxic to species that prey on reef-dwelling fish.