True or False: To date, humans have been identified as having the largest genome size
a. TRUE
b. FALSE
Answer: B
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14C is a radioisotope of carbon that decays into ____
a. potassium b. oxygen c. carbon dioxide d. nitrogen e. sulfur
Which situation occurs after the creation of a new allele?
A) The gene pool becomes more diverse. B) The gene pool becomes less diverse. C) The gene pool fragments into smaller groups. D) Reproductive isolation always occurs in the group where the mutation occurred.
In C4 photosynthesis, where does the carbon in newly synthesized glucose come from?
A) Atmospheric CO2 B) Water C) Chlorophyll D) ATP and NADPH E) Enzymes
An allosteric transcription regulator called HisP regulates the enzymes for histidine biosynthesis in the bacterium E. coli. Histidine modulates HisP activity
On binding histidine, HisP alters its conformation, markedly changing its affinity for the regulatory sequences in the promoters of the genes for the histidine biosynthetic enzymes. A. If HisP functions as a gene repressor, would you expect that HisP would bind more tightly or less tightly to the regulatory sequences when histidine is abundant? Explain your answer. B. If HisP functions as a gene activator, would you expect that HisP would bind more tightly or less tightly to the regulatory sequences when histidine levels are low? Explain your answer.