Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.
a. true
b. false
Answer: a. true
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The ability of a postsynaptic cell to respond to a neurotransmitter depends upon:
A. an action potential in the presynaptic cell. B. release of neurotransmitter from the presynaptic cell. C. presence of receptors on the postsynaptic cell. D. All of the answer options are correct.
Why would environmentalists nurture baby California condors by the use of puppets?
a. If they were directly touched by humans, other condors might detect a human odor. b. They need to learn certain behaviors before they are free in the environment. c. There are not many adult condors available to nurture them. d. all of these
Seawater and freshwater mix in which coastal region?
a. hydrothermal vents b. coral reefs c. seamounts d. tidal pools e. estuary
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the end product of the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.