Which of the following is not a class of plant secondary compounds?
A) terpenoids
B) phenolics
C) nitrogen-based compounds
D) alkanes
D
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Chemical germicides
A. may react irreversibly with proteins/enzymes. B. may react with cytoplasmic membranes or viral envelopes. C. may be disinfecting or even sterilizing. D. are sensitive to dilution factor, time of contact, and temperature of use. E. All of the choices are true.
The carbon dioxide that we breathe out is a breakdown product of cellular respiration; the
carbon atoms come primarily from which molecules?
a. glucose b. proteins c. oxygen d. water
Which of the following experiments might disprove the "inheritance of acquired characteristics"?
a. Separate black mice from white mice. Breed black mice together and white mice together and show that children resemble their parents in color. b. Separate male mice from female mice. Race the male mice down a track. Only allow the fastest males to breed with the females. Show that the male children are no faster than their parents. c. Measure the tail lengths of a population of mice. Cut the tails off and then let them breed. Show that the children's tails are no shorter than their parents' tails. d. Take a population of white mice. Dye the hair of the mice black and show that their children are still born with white hair. e. Separate male mice from female mice. Allow males to attack one another to prove dominance. Only allow the dominant males to breed with the females. Show that the male children are no more aggressive than their parents.
Translation occurs in _____.
A) the nucleus B) a DNA molecule C) a ribosome D) a tRNA molecule