The main class(es) of neurotransmitters involved in regulating mood in vertebrate animals is/are
A. the biogenic amines.
B. acetylcholine and amino acids.
C. gases such as nitric oxide and carbon monoxide.
D. amino acids.
E. acetylcholine.
A. the biogenic amines.
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During translation which molecule is formed?
a. DNA b. mRNA c. tRNA d. proteins e. ribosomes
Which of the following pigments enables red algae to utilize the dim light that penetrates ocean surface water as a source of energy?
A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene
An endergonic reaction can proceed only if it absorbs:a
randomly available free energy. b. less free energy than is released by a coupled exergonic reaction. c. more free energy than is released by a coupled exergonic reaction. d. less free energy than is released by a coupled endergonic reaction. e. the same amount of free energy that is absorbed by the enzymatic breakdown of proteins.
Arthritis is a common result of aging, affecting persons' ability to ________
A) catch their breath after exercise B) move their joints C) heal broken bones D) produce red blood cells