Dormant structures formed by certain bacteria in response to unfavorable environmental conditions are called ____
a. capsids
b. endospores
c. endotoxins
d. exotoxins
e. heterocysts
ANSWER: b
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A sick person often has a fever, which can inhibit the growth of bacteria because
A) bacteria reproduce more rapidly at higher body temperature. B) enzymes do not function as well at temperatures other than the optimal temperature. C) the higher temperature increases the activity of lyases. D) sweating removes prosthetic groups from biological enzymes. E) fever blocks synthesis of proteins in the bacterial nucleus.
How many genes are involved in determining
skin color? a. 1. b. 2. c. 10. d. 20. e. >100
In a normal cell cycle, if a cell is damaged or unhealthy, it will be removed by a process called _______________.
Fill in the blank(s) with the appropriate word(s).
Carbon dioxide molecules enter the light-dependent reactions from the atmosphere.
Indicate whether the statement is true or false.