During conjugation, one gene (A) is found to transfer to the recipient bacteria 26 minutes following the start of conjugation, while a second gene (M) is found to transfer 37 minutes following the start of conjugation
A third gene (T) transfers 45 minutes following the start of conjugation. Based on this information, which of the following is true?
A. Genes A and M have a genetic distance of 11 minutes
B. Genes A and T have a genetic distance of 19 minutes
C. Genes M and t have a genetic distance of 8 minutes
D. The order of the genes is A M T
E. All of the answers are correct
E
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If modern humans came from Africa, what explains the loss of pigmentation seen in different races?
A. Since there was less sunlight, darker pigmentation wasn't needed. B. The lighter-pigmented humans are found in colder climates, where having less pigmentation preserves heat. C. The diet found in the areas where lighterpigmented humans are found contain compounds that interfere with the production of pigmentation. D. Lighter pigment allows for more efficient production of vitamin D, an advantage in areas with less sunlight. E. None of the answer options is correct.
Helicase PcrA follows classic Michaelis-Menten kinetics. In this reaction, ATP serves as a substrate for hydrolysis, while the DNA is most appropriately called the _____________
A. product. B. substrate. C. intermediate. D. coenzyme. E. ligand.
What discoveries in the fossil record led to
questioning the concept that species didn’t change?
a. the oldest layers contain fossils of simpler organisms b. more recent layers contain fossils more similar to existing species c. many fossils were found of extinct animals d. more recent layers contain fossils that are more complex than earlier ones e. all of these are discoveries in the fossil record that led to questioning the concept that species didn’t change
List the similarities and differences between prokaryotic and eukaryotic cells. Identify three ways that
these differences impact cell function.What will be an ideal response?