Certain cancer cells have ABC transport molecules at the cell surface. These transporters use energy from ATP to move chemotherapeutic agents out of the cell. Which of the following do you think these transporters are most closely related to?
a. conjugation pilus
b. membrane pumps
c. altered porins
d. beta-lactamase
Answer: b. membrane pumps
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A crossover that would result in genetic recombination (e.g., A b c or a B C) could involve which pair of chromatids? (Select all that apply.)
Consider a pair of homologous chromosomes heterozygous for three genes (e.g. A B C / a b c) during prophase I of meiosis. Let the sister chromatids of one homolog be numbered 1 and 2; and the sister chromatids of the other homolog be numbered 3 and 4. A) 1 & 2 B) 3 & 4 C) 1 & 3 D) 2 & 4 E) 1 & 4 F) 2 & 3
The two principal divisions of the peripheral nervous system are the:
a. somatic and autonomic systems b. sympathetic and parasympathetic systems c. peripheral and central systems d. afferent and autonomic systems e. cranial and skeletal nerves
Renin is secreted by which one of the following structures?
A) distal tubule B) juxtaglomerular apparatus C) renal medulla D) glomerulus E) Bowman's capsule
A(n) ________ consists of many monomer subunits bonded together in order to produce a large molecule
Fill in the blank(s) with correct word