Many phenols, such as tannins, act as anti-herbivory compounds by:
A. making the inhibiting microtubule
necessary for polymerization.
B. binding with proteins to reduce their
digestibility.
C. binding to active sites of enzymes,
preventing their function.
D. releasing unpleasant odors that deter
feeding.
E. reducing animal appetite by damaging the
nervous system.
B
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Which is a mechanism by which transposable element mobilization may be controlled by the cell? (Select all that apply.)
A) blocking transcription of transposable element genes B) blocking translation of transposable element transcripts C) alternative splicing of transposable element transcripts D) synthesizing an enzyme that removes transposable elements from the genome E) increasing the mutation rate of transposable element DNA sequences
If a hypothetical human female of genotype XX had no Barr body in any of her cells
a. she would be phenotypically male b. she would be considered triploid c. the genes on both X chromosomes would be expressed d. she would have Turner syndrome e. she would have a Y chromosome
Monoglycerides and fatty acids diffuse into a brush border cell, where they combine with proteins
resulting in __________. Fill in the blank(s) with the appropriate word(s).
The influenza virus contains an RNA genome. Why do scientists typically have to make a new vaccine for the flu every year?
A. because our bodies develop resistance to the vaccine and it becomes less effective B. because the virus develops resistance to the vaccine C. because the virus can mutate into new strains D. because people change their habits each year and become susceptible to different strains of the virus E. because the common influenza virus can come from many species of animals including cats and dogs