Helicobacter pylori

A. inhabit the stomach.
B. inhabit squid ink sacs.
C. cause crown gall in plants.
D. have axonemes.


A

Biology & Microbiology

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A toxic substance has been found to inhibit glucose transport into mammalian cells. If this substance is administered

to a hamster, the likely cause of death would be a lack of ____ production.

a. NAD+ b. ATP c. GTP d. CO2 e. FAD

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The synthesis of ____ is triggered when cells bind systemin

a. gibberellin b. auxin c. jasmonate d. cytokinin e. brassinosteroids

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Which of these is a component of ribosomes? 

A. DNA B. rRNA C. tRNA D. ribosome

Biology & Microbiology

The hormone prolactin, found in distantly related vertebrates, exerts different effects in different species. From an evolutionary standpoint, this is an indication that prolactin

A) can only have functions related to childbirth. B) is an ancient hormone whose function diversified through evolution. C) was a recent evolutionary adaptation. D) was not required in fish and amphibians.

Biology & Microbiology