Which cells assist and nourish neurons that transmit electrical signals?
a. receptor cells
b. neurons
c. effector cells
d. glial cells
e. signal cells
ANSWER: d
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Which two metabolic processes are MOST dissimilar?
A) citric acid cycle and glycolysis B) glycolysis and gluconeogenesis C) proton motive force and substrate-level phosphorylation D) pentose phosphate pathway and glycolysis
The first group of cells to migrate through the blastopore will become
A. neurons of the brain. B. neurons of the peripheral nervous system. C. notochord. D. epidermis. E. yolk plug.
Enzymes work with at least three mechanisms. Which of the following is not a mechanism by which enzymes function?
a. putting reactants in close proximity to each other b. altering the free energy (?G) of the reaction c. altering the immediate environment of the reactants to promote reactant interactions d. orienting the reactants so they are positioned to favor the transition state
Methylation regulates transcription
a. via the addition of a methyl group to cytosine bases of DNA. b. via the addition of a methyl group to cysteine residues on RNA polymerase II. c. via the addition of a methyl group to cysteine bases of DNA. d. via the addition of a methyl group to cytosine residues on RNA polymerase II. e. by interfering with the chromatin remodeling process.