Based on his experiences while aboard the H.M.S. Beagle, Darwin realized that ____ provided the only plausible
explanation for his observations.
a. descent with modification
b. a metaphysical perfecting principle
c. the principle of use and disuse
d. catastrophes in ancient environments
e. inheritance of acquired characteristics
ANSWER: a
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The polymerase chain reaction is used to duplicate small sections of
A. DNA. B. RNA. C. proteins. D. lipids.
A microbiologist studying the human microbiome is interested in how a particular bacterial species may impact water absorption in the large intestine. Which of the following models is appropriate for this investigation?
A. A normal mouse colonized with enteric microbiota found in the human colon. B. A germfree mouse inoculated with human microbiota shortly after birth. C. A human volunteer who is a carrier of that particular bacterial species. D. A germfree mouse raised in a sterile environment.
Which PCR step causes the denaturation of double-stranded DNA?
A. Add primers. B. Heat target DNA to 94°C. C. Add DNA polymerase and nucleotides at 72°C. D. Repeat the cycle of heating and cooling. E. Cool DNA to between 50°C and 65°C.
Describe each of the following parameters that relate to the structure and function of tRNA:
(a) four functional domains (b) Wobble hypothesis What will be an ideal response?