For the isotopes of any element, the _____ number will always be the same.
A) mass
B) atomic
C) superscript
D) neutron
Ans: B) atomic
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The sodium leak channels in photoreceptors are cyclic GMP-gated channels. What must occur during activation of photoreceptor cells by light?
A. Cyclic GMP levels are reduced. B. Cyclic GMP levels are increased. C. Cyclic GMP is exchanged for cyclic AMP. D. Cyclic GMP is exchanged for GTP.
Which of the following is NOT true about peat
bogs?
a. they are found throughout the world at high latitudes b. they are harvested and used in planting mixtures c. they are harvested and used as fuels d. they are anaerobic e. they are highly alkaline
Krebs cycle reactions and electron transfer
phosphorylation are a. in the mitochondrion and ER, respectively. b. in separate parts of the mitochondrion. c. inside and outside the mitochondrion, respectively. d. in the same mitochondrial compartment. e. cytoplasmic reactions.
African pygmies are likely to reproduce earlier because they lack sufficient food to continue growing.
a. true b. false