At 4:00 p.m. a closed flask of sterile broth is inoculated with 10,000 cells. The lag phase lasts 1 hour. At 9:00 p.m. the log phase culture has population of 65 million cells. The approximate number of generations that has occurred is
A. 27.
B. 13.
C. 21.
D. 5.
Answer: B
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Polyandry is more common than polygyny
Indicate whether the statement is true or false
True or False: Most mutations that occur within cells do NOT negatively affect their metabolic capacity
a. TRUE b. FALSE
The photosynthetic production of one molecule of glucose requires ________ molecule(s) of ATP.
A. 18 B. 12 C. 6 D. 24
Why is the most damage to the brains of Huntington disease patients observed in the striatum?
a. The Rhes protein, needed for mutant huntingtin to become toxic, is only produced in the striatum.
b. The huntingtin gene is only expressed in the striatum.
c. The mutant huntingtin protein becomes toxic when bound to the Rhes protein, which is abundant in the
striatum.
d. Only the cells of the striatum contain the huntingtin mutation.
e. The CAG expansions are corrected in regions of the brain other than the striatum