Based on our understanding of the early stages of life, ________ is/are thought to be one of the earliest forms of metabolic regulation that evolved
A) attenuation
B) feedback inhibition
C) riboswitches
D) transcription factors
Answer: C
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A component of bacteria that are often used in biotechnology are
a. operons. b. introns. c. exons. d. polypeptides. e. plasmids.
Which system is involved with heat production?
a. endocrine system b. nervous system c. muscular system d. respiratory system e. skeletal system
Nitrogen fixation is the process by which gaseous nitrogen is converted to nitrate
____________________ Indicate whether the statement is true or false.
At the breakfast table, your roommate says, "Oops! I forgot to take my melatonin last night. I'd better take it now." How do you respond?
A. "Don't take it after a meal - it promotes the 'fight-or-flight' response, not 'rest-and-digest'." B. "Good idea - you don't want your bones to get brittle." C. "Don't take it now - it regulates biological rhythms, and is normally high at night and low during the day." D. "Be sure not to take too much, or your blood sugar could get dangerously low."