Which statement about DNA methylation is true?
a. DNA methylation is limited to the original cell and cannot be inherited by offspring.
b. DNA methylation promotes transcription by unwinding DNA from histone proteins.
c. DNA methylation occurs in CpG islands located within the promoter region of genes.
d. DNA methylation always results in genes that are silenced and inactive.
c. DNA methylation occurs in CpG islands located within the promoter region of genes.
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When does the ? subunit dissociate from RNA polymerase?
A. after promoter clearance B. at the termination of transcription C. immediately after promoter binding D. immediately before promoter binding E. not until the enzyme is degraded
Food poisoning is often caused by a bacterium called ________.
A. MRSA B. Staph C. Salmonella D. Anthrax
Ethanol (drinking alcohol) is an inhibitor of ADH. Therefore, a person consuming a couple of mixed
drinks should excrete a. less water because ADH promotes reabsorption. b. the alcohol because ADH cannot degrade it. c. ketone bodies formed from the alcohol. d. more water because ADH normally promotes reabsorption. e. more water and the alcohol due to the ADH inhibition.
Tawny owls (Strix aluco) pair-bond for life, with both members of a pair living and hunting in adjacent, well-defined
territories. Their reproduction is regulated in accordance with the resources, especially the food supply, present in their territories. Tawny owls can best described as: a. r strategists. b. K strategists. c. fecundists. d. life historists. e. scramblers.