These genes encode proteins that generally regulate the cell cycle in normal cells
a. tumor suppressor genes
b. proto-oncogenes
c. oncogenes
d. tumor suppressor genes and proto-oncogenes
e. tumor suppressor genes, proto-oncogenes, and oncogenes
B
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A "nerve" is defined as:
a. neuron fibers bundled inside a sheath of connective tissue b. a single axon of a neuron c. the same as a neuron within the central nervous system d. a dendrite e. a fiber more than 10 inches in length
Which is the main material of cell membranes?
a. lipids b. proteins c. phospholipids d. triglycerides e. fatty acids
Cilia are found in certain
A) Protozoa B) Fungi C) Algae D) Bacteria E) All of the above
Place the following events that occur at the vertebrate neuromuscular junction in the correct order.IDepolarization of the muscle fiber membrane.IIGeneration of an action potential in the neuron.IIIStimulation of Ca2+ entry into the neuron.IVRelease of acetylcholine into the synapse.
A. IV, II,III, I B. III, II, IV, I C. I, III, IV, II D. I, II, III, IV E. II, III, IV, I