During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a ?G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the ?G for the new reaction?
A) -40 kcal/mol
B) -20 kcal/mol
C) 0 kcal/mol
D) +20 kcal/mol
E) +40 kcal/mol
Answer: B
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The polytene chromosomes of Drosophila are an example of _________
A. aneuploidy B. polyploidy C. translocations D. inversion loops E. None of the answers are correct
If food-borne disease transmission does not require growth of the microorganism after ingestion because the toxic substances are already present in the food as a result of previous growth, then it is referred to as a food-borne ________.
Fill in the blank(s) with the appropriate word(s).
Biological magnification refers to the
1.increase in size of animals as they progress through a food chain. 2.increase in size of organisms as they progress through ecological succession. 3.increase in the efficiency of energy utilization as organisms progress through a food chain. 4.accumulation of toxic pollutants as animals pass through a food chain. 5.growth of organ size within organisms.
The rapid expansion of angiosperms late in the
Mesozoic era appears to be related to their coevolution with a. dinosaurs. b. gymnosperms. c. insects. d. mammals. e. birds.