In order to survive, heterotrophs must
a. harvest the heat energy that is lost in energy
conversions.
b. recycle energy from our metabolic
reactions.
c. constantly take in energy rich foods.
d. harvest energy from sunlight.
e. convert low energy molecules into high
energy molecules
C
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B. pertussis colonies growing on Regan-Lowe medium yields which of the following colonial morphologic appearances?
a. Star-shaped colonies b. Mercury-drop colonies c. Yellow-pigmented colonies d. Shiny black-pigmented colonies
Within six months of effectively using methicillin to treat S. aureus infections in a community, all new infections were caused by MRSA. How can this result best be explained?
A. The drug caused the S. aureus DNA to change. B. Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency. C. In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug. D. A patient must have become infected with MRSA from another community. E. S. aureus can resist vaccines.
Briefly describe the makeup of VNTRs (variable number tandem repeats)
What will be an ideal response?
Transcription is the process of
A) synthesizing a DNA molecule from an RNA template. B) assembling an RNA molecule without a template. C) replicating a single-stranded DNA molecule. D) synthesizing a protein using information from mRNA. E) synthesizing an RNA molecule using a DNA template.