DNA repair in eukaryotes that facilitates replication in regions of thymine dimers is mediated by a unique DNA polymerase
A) ?.
B) ?.
C) ?.
D) ?.
E) ?.
B) ?.
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A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies covalently linked to
colored fluorescent dyes (antibodies to mouse proteins were labeled green; antibodies to human proteins were labeled red). Forty minutes later, what will the researcher observe?
a. The fused cell will still be half red and half green. b. The red and green fluorescent labels will be uniformly distributed throughout the entire membrane. c. The red and green labels will be distributed in intermingled patches. d. The red and green labels will flash intermittently. e. The red and green labels will be distributed in a swirling pattern.
Which of the following structures is NOT a component of the hindbrain?
A. pons B. medulla oblongata C. ascending tracts D. cerebellum
If the ? of surrounding soil is higher than that in living root epidermal cells, then water should ____
a. leave the root cells, making them flaccid b. enter the root cells, making them turgid c. leave the root cells, making them turgid d. enter the root cells, making them flaccid e. none of these accurately describe water movement
Keeping internal conditions within tolerable
limits is called
a. maintenance. b. anatomy. c. physiology. d. homeostasis. e. equilibrium