A bacterial pathogen has just entered the body of a person. Describe the sequence of events that lead to
the production of enzymes that will hydrolytically destroy the bacterial cell, beginning with events in
the nucleus and ending with destruction of the pathogen.What will be an ideal response?
Sequence of events: DNA transcription into RNA; translation of the RNA on ribosomes into a
hydrolytic enzyme; post-transcriptional modification of the resultant protein enzyme in the ER lumen
and the Golgi; packaging of the enzyme in a primary lysosome; fusion of the lysosome with a
phagocytized vacuole containing the engulfed bacterium.
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True or false: When two populations have undergone allopatric speciation long enough to be unable to produce fertile offspring, then they are different enough to be considered two different species
A. true B. false
The result obtained in Jacob and Monod's merodiploid analysis that suggested the lacO region acts in cis to regulate the lac operon was:
A. a nonfunctional lacI mutant is rescued by a wild-type lacI allele. B. a nonfunctional lacI mutant cannot be rescued by a wild-type lacI allele. C. a nonfunctional lacO mutant is rescued by a wild-type lacO allele. D. a nonfunctional lacO mutant cannot be rescued by a wild-type lacO allele.
Pollen likely evolved in response to plants moving to drier land
Indicate whether the statement is true or false
If you crossed a true-breeding yellow seed plant (AA) with heterozygous yellow seed plant (Aa):
A. offspring genotypes would be 1 AA : 2 Aa. B. offspring genotypes would be 1 Aa: 1 aa. C. offspring genotypes would be 1 AA : 1 Aa. D. offspring phenotypes would be ½ yellow seed and ½ green seed. E. offspring genotypes would be 1 Aa : 1 aa and would be ½ yellow seed and ½ green seed.