1) A glucose fed yeast cell is moved from an aerobic environment to an anaerobic

Question

1) A glucose fed yeast cell is moved from an aerobic environment to an anaerobic one. If the cell continues to generate ATP at the same rate, how will its rate of glucose consumption compare to consumption in the aerobic environment? (5 pts) 2) What color of light would be least effective at driving photosynthesis and why? Explain and support your answer with any necessary data. (5 pts.) 3) A starving cell has reached the stage where all of the AT has been used up. If this cell was placed in a fresh nutrient broth at this point, will the cell recover and survive? Explain! (5 pts) 4) Biologists refer to the movement of energy through an ecosystem as “energy flow" and not "energy cycling". Wh do you think they use the word flow instead of cycling? Relate your answer to the laws of thermodynamics. (5pts 5) A series of enzymes catalyze the reaction X Y Z Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases tl activity for the enzyme. Explain this system and what functi each substrate, product, and enzymes serves in this system. U the appropriate terminology. (5pts)

Explanation / Answer

1) when yeast is fed glucose in aerobic environment then the aerobic respiration occurs and in aerobic respiration 38ATPs are produced per glucose molecule. Now when the yeast is shifted to an anaerobic environment them fermentation occurs. And in fermentation only 2 ATPs are produced per glucose molecule. So if the yeast cells need to produce same amount of ATPs in anaerobic environment then the cells would need to consume at 19 times the rate from the aerobic environment only then cells will be able to produce same amount of ATPs

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