A sprinter (very fast runner) can rapidly use up its store of ATP energy. How can one obtain ATP quickly?
a. All of these choices are possible
b. Through glycolysis and the Kreb's cycle where ATP is produced through substrate phosphorylation.
c. Through lactic acid fermentation where the production of ATP is low, but fast.
d. rough oxidative phosphorylation where the output of ATP energy is greatest
Answer: c. Through lactic acid fermentation where the production of ATP is low, but fast.
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What does it mean when we say the genetic code is redundant?
A) A single codon can specify the addition of more than one amino acid. B) The genetic code is different for different domains of organisms. C) The genetic code is universal (the same for all organisms). D) More than one codon can specify the addition of the same amino acid.
A tube coagulase test was performed on catalase-positive, gram-positive cocci that were ?-hemolytic and grew on mannitol salt agar. The tube was checked after overnight incubation and was negative. Which of the following statements explains this discrepancy?
a. A tube coagulase should not be performed on a catalase-positive organism. b. A ?-hemolytic colony, which is catalase positive and grows on mannitol salt, is normally coagulase negative. c. The test should have been read in 1 to 4 hours in case any hemolysins are present. d. No discrepancy is present; the results are accurate.
The maximum rate of increase of a population is its
a. potential. b. carrying capacity. c. exponential growth. d. distribution. e. reproductive base.
Craig Mellow investigated RNA interference by injecting antisense and double-stranded RNAs into C. elegans. If the antisense and double-stranded RNAs were very similar, but not identical, to C. elegans mex-3, what would be the results of their experiment?
A. Virtually all the C. elegans mex-3 RNA would be degraded, so embryos from worms injected with antisense and double-stranded RNA would not be green. B. Many different C. elegans RNAs would be degraded, so embryos from worms injected with antisense and double-stranded RNA would most likely be dead. C. More C. elegans mex-3 mRNA would be produced by transcription, so embryos from worms injected with antisense and double-stranded RNA would be green. D. The C. elegans mex-3 RNA would be inhibited, but not degraded, so the embryos from worms injected with antisense and double-stranded RNA would be green.