The sugar in DNA is comprised of ____ carbons
a. three
b. four
c. five
d. six
e. seven
ANSWER: c
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Phospholipids are made up of:
A. a glycerol and three fatty acids. B. four fused carbon rings. C. a phosphate, two fatty acids and a glycerol. D. five-carbon rings with two nonpolar tails.
Sensory information is transmitted to the CNS by the ____
a. efferent neurons of the autonomic nervous system b. afferent neurons of the peripheral nervous system
c. somatic neurons of the peripheral nervous system d. somatic neurons of the sympathetic division e. efferent neurons of the sympathetic division
The formation of amino acids under abiotic
conditions was important because they serve as a. a supply of structural units for proteins. b. enzymes to catalyze reactions. c. subunits in the formation of DNA. d. subunits in the formation of RNA. e. subunits for the formation of lipids.
Saltatory ("jumping") conduction
a. occurs only in the central nervous system. b. is a quicker type of nerve conduction. c. occurs between nerves and muscles. d. involves the movement of impulses from node to node. e. involves both a quicker type of nerve conduction and the movement of impulses from node to node.