Which of the following serves as a switching mechanism in the photoperiodic response in plants?
a. phytochrome
b. auxin
c. cryptochrome
d. calmodulin
e. phytoalexin
ANSWER: a
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Prior to continental drift, North America and Eurasia formed a supercontinent called ________
Fill in the blank(s) with correct word
When bonding two monosaccharides to form a disaccharide, which process is used?
A. Dehydration reaction B. Peptide bond formation C. Breakage of a glycosidic linkage D. Hydrolysis reaction
Escherichia coli O157:H7 cells usually infect
humans when they come into contact with a. other humans. b. canned fruit. c. animal feces. d. well-done steaks. e. all of these.
Proteins contain both acidic and basic R groups and can, therefore, function as
A. energy storage macromolecules. B. structural macromolecules. C. buffers. D. catalysts. E. genetic material.