Positive control of the LAC operon can be best described by which of the following:
a. occurs when glucose concentration is limiting
b. occurs when cAMP concentrations are high
c. results in RNA polymerase binding to the promoter
d. directly occurs due to the binding of cAMP-CAP complex
e. all of the above
e. all of the above
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Which statement factors into artificial but not natural selection?
A. Most organisms are capable of producing more offspring than typically survive. B. Phenotypic variation of a species has variable appeal to humans interested in that species. C. Phenotypic variation exists within populations. D. Phenotypic variation can influence reproductive success. E. Phenotypic variation within a species is due in part to inherited characteristics.
Why are sex chromosome aneuploidies less detrimental than autosomal aneuploidies?
A. Sex chromosomes do not contain genes that are important for anything other than sex determination. B. In females, all but one X-chromosome is inactivated; in males, the Y chromosome contains very few genes, so extra or missing copies do not cause huge abnormalities. C. Gene expression of the sex chromosomes is not dosage-dependent as it is for the autosomes. D. Sex chromosomes are only found in gametes, they do not occur in diploid cells. E. All of these are TRUE.
All bacteria are pathogenic.
a. true b. false
The primary reservoir of anthrax is herbivores
Indicate whether the statement is true or false