A hypothesis can best be described as a(n):
a. data point
b. conclusion
c. observation
d. tentative explanation
e. stepwise problem-solving approach
d
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Isolating a bacterium of the ________ class would be of high impact due to it only having one cultured representative
A) Alphaproteobacteria B) Betaproteobacteria C) Epsilonproteobacteria D) Zetaproteobacteria
Some chickens have a dominant frizzle gene that leads to the development of feathers that curl
outward rather than lying flat against their bodies as in standard chickens. Aside from these “frizzled feathers,” chickens with this dominant allele also tend to have higher metabolic rates and produce fewer eggs than chickens that carry the recessive version of this gene. Thus, this gene exhibits __________.
a. pleiotropy b. polygenic inheritance c. incomplete dominance d. codominance
The process by which CO2 is released through the oxygenase activity of rubisco is called ____
a. photosynthesis b. photophosphorylation c. phosphorylative oxidation d. photorespiration e. oxidative phosphorylation
How is glucose involved in catabolite repression of the lac operon?
A) Glucose causes cAMP levels to increase, which leads to increased CRP binding and the lac operon is activated even when lactose is present. B) Glucose causes cAMP levels to decrease, which leads to decreased CRP binding and the lac operon is repressed even when lactose is present. C) Glucose is also a substrate for ?-galactosidase and thus competes with lactose for this enzyme. D) Glucose activates transcription of the lacI gene to increase the amount of Lac repressor in the cell.