Synthetic reactions are hydrolytic reations
a. true
b. false
Ans: b. false
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What is present in arterioles that is NOT present in capillaries?
A) white blood cells and platelets B) carbon dioxide C) a lining of endothelial cells D) circular smooth muscle cells
What is true of the differences between chemical and electrical synapses?
a. Signals across chemical synapses are sometimes bidirectional. b. Electrical synapses are only found in the brain. c. Neurons are physically connected across electrical synapses. d. Only charged ions can travel across electrical synapses.
In order to take up a naked DNA molecule, a cell must be ________, which may occur only at certain stages in the life cycle of the organism.
Fill in the blank(s) with the appropriate word(s).
Base pairs in DNA are attracted to each other by
A. ionic bonds. B. covalent bonds. C. hydrogen bonds. D. unzipping enzymes.