____________________ junctions are channels that connect the cytoplasm of neighboring cells. Fill in the blank(s) with the appropriate word(s)
ANSWER: Gap
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Which of the following uses dsRNA as the genome?
A. Poxvirus B. Rotavirus C. Parvovirus D. Bunyavirus
The table below lists several genotypes associated with the lac operon in E. coli. For each, indicate with a "+" or a "-" whether ?-galactosidase would be expected to be produced at induced levels
?-Galactosidase Production Genotype No Lactose With Lactose (a) I + O+ Z+/F' I - O+ Z+ (b) I - Oc Z -/F' I - Oc Z - (c) I - Oc Z+/F' I - O+ Z+ (d) I s Oc Z -/F' I s O+ Z+ I + = wild-type repressor I - = mutant repressor (unable to bind to the operator) I s = mutant repressor (insensitive to lactose) O+ = wild-type operator Oc = constitutive operator (insensitive to repressor)
After surviving a bottleneck, a population recovers to the point where it consists of as many individuals as it did prior to the bottleneck. Which of the following statements is most likely to apply to this population?
A) The postbottleneck population exhibits less genetic variation than the prebottleneck population. B) The bottleneck subjected the population to stabilizing selection. C) The postbottleneck population has less of a chance of going extinct than did the prebottleneck population. D) The postbottleneck population exhibits more genetic variation than the prebottleneck population.
Organisms that form lactate, ethanol, and CO2 as end products of glucose metabolism are called ________ fermenters.
Fill in the blank(s) with the appropriate word(s).