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A regulator gene-minus strain of E. coli is constitutive for expression of the lac-operon because the repressor cannot bind tothe operator region even when lactose is present. By bacterialconjugation, it is possible to introduce into the regulator-minusstrain a wild type or regulator-plus gene, which can betranscribed.What effect does lactose have on expression of the lac-operon in the bacteria containing both types of regulator genes? Explain youranswer.
How will increasing the number of yeast cells affect the rate of ATP production by the cells (in moles ATP/ hr) if the sugar concentration in the experiment is held constant?
Net filtration pressure equals
Difference between a hereditary germline cancer, such as those caused by BRCA1 mutations, and cancers that result from two somatic mutations in the same gene in the same cell.
We always hear that starchy foods are a great source of nutrition because the glucose molecules that are contained within the starch can be used for energy.
Persons who drink sufficient amounts of alcohol show rapid changes in central nervous system function, including both motor and behavioral changes,
Suppose that a new low calorie sweetener is developed. The structure is novel and is tested with the Ames test for mutagenicity.
The evolution of organisms is not as simple as the single locus models used to define basic theory. Models that describe two locus evolution, and the correlation among these loci, are more complex.
How many genes are involved in the growth behavior phenotype, and what must the genotypes in the cross be? Assume recessive loss-of function mutations are involved.
Determine the independent variable in the corn experiment? What was the dependent variable in the corn experiment?
Which of these observations fails to support the endosymbiotic theory for the origin of eukaryotic cells?
Explain the processes involved in cellular protein synthesis. How would synthesis be affected by intake of an otherwise adequate diet that is very low in glycine or low in tryptophan?
In which organism will a transposon more easily spread: in an asexual haploid species, or in a sexual diploid species? Explain.
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