What types of nonlethal conditional mutations affecting bacterial cell division have been recovered?
What will be an ideal response?
Ans: Mutations affecting septum formation have been recovered. In these cases, cell growth and chromosome segregation occur, but cells do not divide, so the result is a long filament with evenly spaced nucleoids. In mutations where septum formation is too frequent, minicells lacking nucleoids are a result. Finally, mutations affecting chromosome segregation, resulting in anucleate cells, have been recovered.
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You expect to find the lowest overall blood pressure in
A. humans. B. sparrows. C. alligators. D. ostrich. E. salmon.
Larval oysters attach themselves to:
a. They do not have specific requirements. b. any available solid substrate. c. other oyster shells. d. both b and c e. sand.
Describe the steps in the polymerase chain reaction (PCR). What will be an ideal response?
The rate of transcription for a gene is found to be affected by a mutation. Where would you expect the mutation to appear on the DNA?
A. In the promotor for the gene B. In the rRNA of the ribosomes translating the gene C. In a splice site for the gene D. In the exon of the gene E. In an intron associated with the gene