A gene that affects, prevents, or masks the expression of a gene at another locus is a(n) ____ gene
a. recessive
b. dominant
c. epistatic
d. codominant
e. pleiotropic
c
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All of the following are characteristics of vertebrates EXCEPT
A. postanal tails. B. vertebral columns. C. internal organs. D. exoskeletons. E. skulls.
Consider the following two half reactions:NAD+ + H+ + 2e? ? NADH Eo (volts) = ? 0.32Pyruvate? + 2H+ + 2e? ? lactate 2? Eo(volts) = ? 0.19In a redox reaction involving NAD/NADH and pyruvate, ________ will be the electron donor and ________ will be the electron acceptor.
A. NAD+; pyruvate B. lactate; pyruvate C. NADH; pyruvate D. pyrvuate; lactate
You digest DNA from the frog Xenopus laevis with the enzyme NotI that produces sticky DNA ends. You can ligate your DNA to (select all that apply)A) blunt AluI ends from Xenopus laevis.B) sticky NotI ends from Xenopus laevis.C) blunt AluI ends from bacteria.D) sticky NotI ends from bacteria.E) sticky EcoRI ends from Xenopus laevis.F) sticky EcoRI ends from bacteria.
What will be an ideal response?
If you were exposed to a sick animal that was found to have negri bodies in its nervous system in a postmortem examination, how would you be treated to prevent disease?
A) passive and active immunization against rabies B) antibiotics to treat Lyme disease C) antiviral medication D) observation to detect tick or lice bites