Week #4 Assignment Questions And Answers 100% Verified A+ Guaranteed

In an aerobically metabolizing cell, how many carbons from 13 original glucose molecules enter the Krebs cycle in the absence of oxygen? a. 0 b. 26 c. 52 d. 78 {Ans: a. 0}What are the two components of the proton-motive force? a. pH gradient and equilibrium b. pH gradient and voltage c. voltage and ATP d. voltage and lipid-soluble agents {Ans: b. pH gradient and voltage}What advantage do the cristae confer on the mitochondria? a. they allow the mitochondria to shrink b. they greatly increase the surface area for aerobic respiration machinery c. they allow swelling of mitochondria d. they activate the matrix {Ans: b. they greatly increase the surface area for aerobic respiration machinery}During aerobic exercise, muscle fibers first use glycogen for energy, and then they switch to use of: a. creatine phosphate b. free fatty acids c. glucose d. lactic acid e. creatine {Ans: b. free fatty acids}Most of the ATP made during cellular respiration is generated through _____. a. glycolysis b. the Calvin cycle c. the Krebs cycle d. oxidative phosphorylation {Ans: d. oxidative phosphorylation}In what form does a portion of the product of glycolysis enter the TCA cycle? a. acetyl CoA