Biology, 12.03.2020 20:23, btsheygirl
The enzyme phosphofructokinase (PFK) from E. coli is a tetrameric enzyme that allosterically binds AMP. The binding of AMP increases the affinity of the substrates for the active site of PFK. Which of the following is true concerning this system?
A. AMP is a competitive inhibitor. B. AMP is an allosteric activator and will stabilize PFK in a conformation that will require less substrate to achieve 1/2 Vmax. C. AMP is an allosteric inhibitor and will stabilize PFK in a conformation that will require more substrate to achieve 1/2 Vmax. D. AMP is a cofactor/coenzyme for PFK and is absolutely required for PFK activity.
Answers: 2
Biology, 22.06.2019 09:40, damianfrasieanu5387
Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.
Answers: 1
Biology, 22.06.2019 11:00, brainy51
4. if a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell, what can be said about the movement of water? a. water will move out of the cell, causing it to shrivel. b. water will move in and out of the cell at the same rate. c. water will move out of the cell, causing it to swell. d. water will move into the cell, causing it to swell.
Answers: 2
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