Alzheimer disease has been shown to be related to_______
a. alcoholic fermentation in the brain d. decreased brain metabolism
b. lactate fermentation in the brain e. increased mitochondrial enzyme activity
c. increased brain metabolism
D
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Recombination between homologous chromosomes:
A. can lead to a gene conversion event if the region between the two Holliday intermediates contains base pair differences. B. uses extended synthesis-dependent strand annealing (ESDSA) rather than synthesis-dependent strand annealing (SDSA). C. can occur at completely random sites on the chromosome; there is no apparent regulation of the process. D. occurs between sister chromatids and nonsister chromatids with equal frequency. E. None of the choices given is true.
The ovary in an adult contains
A) seminal vesicles. B) many oocytes in various stages of maturity. C) many sperm in various stages of maturity. D) a number of mature oocytes equal to 100 minus the woman's age.
When human volunteers were given high doses of AAS, ____
a. TSH levels increased b. gonadotropin levels increased c. natural testosterone levels increased d. thyroxine levels decreased e. TSH levels were unaffected
Four of the five answers listed below are related by a common phase of mitosis. Select the exception
a. chromosomes decondense b. spindle microtubules disappear c. nucleolus reappears d. chromosomes separate e. nuclear envelope reforms