Regions at the ends of chromosomes that prevent chromosomes from sticking to each other are called ____
a. satellites
b. telomeres
c. centromeres
d. q zones
e. p zones
b
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Arsenic poisoning can lead to organ failure and death. Though arsenic can inhibit or interfere with a number of cellular enzymes, arsenic poisoning is thought to be mainly due to indirect inhibition of enzymes involved in both pyruvate oxidation and the Citric acid cycle. As a result, this compound must be able to enter which cellular compartment?
A. The intermembrane space of the mitochondria B. The cytoplasm C. The endoplasmic reticulum D. The nucleus E. The mitochondrial matrix
Suppose you take a cell from an adult cow and attempt to produce a clone of that cow. Also suppose that, for some reason, telomerase is NOT functioning in that cell or in any cell that comes from it. What would you expect to happen with the clone?
a. The lack of telomerase should have no effect on the clone. b. When the clone grows up, it will most likely have cancer. c. The cell will never be able to divide at all. d. The cell may divide, but after a certain number of divisions, cell division will stop.
What is the best term describing a sudden spike of new cases of 'meningitis' disease among a group of Aggies?
A. Enzootic B. Epidemic C. Zoonosis D. Epizootic E. Endemic
Which of the following birds has a beak adapted for straining vegetation from water?
A. Robin B. Duck C. Vulture D. Kingfisher E. Eagle