DNA replication
a. occurs in the cytoplasm of the cell.
b. does not require proteins.
c. occurs in G1 of interphase.
d. takes place in the nucleus of the cell.
e. is constantly happening in a cell.
D
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Four of the following organisms belong in the clade of class Reptilia. Which one does not?
a. turtle b. fish c. birds d. lizards e. snakes
How do phospholipids interact with water molecules?
A) The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract). B) Phospholipids do not interact with water because water is polar and lipids are nonpolar. C) The polar heads interact with water; the nonpolar tails do not. D) Phospholipids dissolve in water.
Antacids neutralize acid by the following reaction. Identify the salt in the following equation: Mg(OH)2 + 2HCl ? MgCl2 + H2O
A) Mg(OH)2 B) HCl C) MgCl2 D) H2O E) None of the answers is correct.
Which of the follow is false concerning the tetanospasmin toxin?
A) taken up by peripheral motor neurons and transported to the spinal cord B) leads to flaccid paralysis C) blocks the release of inhibitory neurotransmitters, preventing muscle relaxation D) causes intense muscle spasms, drooling, sweating, and irritability E) causes irreversible damage to neurons