The toxin of Vibrio cholerae causes severe diarrhea because it ____

a. modifies DAG and activates a cascade of protein kinases
b. activates phospholipase to produce inositol triphosphate
c. decreases the cytosolic concentration of Ca++
d. modifies a G protein involved in regulating salt and water secretion
e. binds with adenylyl cyclase and triggers formation of cAMP


D

Biology & Microbiology

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What protein makes up a thick myofilament?

A) T tubules
B) Muscle twitch
C) Testosterone
D) Myosin

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Stress, relaxation, hunger, consuming the wrong foods, and too much or too little sleep can contribute to which of the following?

A) stroke B) coma C) headache D) spinal cord injury

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Choose the letter of the best match from the following:A. protodermB. vascular cambiumC. apical meristemD. procambiumE. ground meristemLateral meristem that contributes to the increase in thickness of a stem or root.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology