Ethanol (drinking alcohol) is an inhibitor of ADH. Therefore, a person consuming a couple of mixed
drinks should excrete
a. less water because ADH promotes reabsorption.
b. the alcohol because ADH cannot degrade it.
c. ketone bodies formed from the alcohol.
d. more water because ADH normally promotes reabsorption.
e. more water and the alcohol due to the ADH inhibition.
D
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When a farmer grows cotton containing the gene for Bt toxin, they often leave a strip of non-Bt cotton around the outside of the field for what reason?
A. because the non-Bt cotton does not drive the moths and caterpillars to extinction B. because the non-Bt cotton grows better C. to allow some RR bollworm caterpillars to survive and limit selection pressure for resistance D. to allow some rr bollworm caterpillars to survive E. to allow the non-Bt and Bt cotton plants to cross-pollinate
Which of the following can cause cancer?
A. chemicals B. viruses C. environmental contaminants D. UV rays E. All of the choices can cause cancer.
Sequence-tagged sites (STS) are used to assemble DNA maps from a given species. STSs are useful in this regard because
A. they generate DNA fragments of a reasonable size for mapping. B. they are only found in genes, not in noncoding DNA. C. each STS is found many times within the genome. D. they provide a way to order DNA fragments.
Which is true regarding release of the T4 bacteriophage?
a. T4 enzymes compromise the cell membrane and peptidoglycan, causing lysis of the host cell. b. Cro allows the expression of release proteins, leading to host-cell lysis. c. Newly assembled T4 phages are released via a secretion apparatus. d. T4 phages exit via budding, assembling an envelope from the cell membrane.