Question 9 (2 points) Pyruvate is shuttled into the mitochondria before it can be further oxidized. a) True b) False Question 10 (2 points) Pyruvate is oxidized to lactate under anaerobic conditions in the cell. a) True b) False Question 11 (2 points) Lactate is metabolized into glucose in a muscle cell. a) True b) False Question 12 (2 points)
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QUESTION 1 True or False: In anaerobic organisms NAD+ is reduced in fermentation instead of in glycolysis. True False QUESTION 2 True or False: The electrons that flow through all of glucose catabolism begin their journey in a molecule of NADH or FADH2. True False QUESTION 3 True or False: Both anaerobic and aerobic organisms produce CO2 as a result of glucose catabolism. True False QUESTION 4 True or False: If you could label electrons and follow them to the very end of glucose catabolism, you would ultimately find them in CO2. True False
Bryan V.
1. True or False? In the Cori Cycle, actively contracting muscle cells convert pyruvate to lactate. Lactate is transported in blood to liver, where it is "recycled" by gluconeogenesis to glucose, which is transported back to muscle for additional ATP production. Muscle contracting aerobically must reduce pyruvate to lactate by reoxidizing NADH to NAD+. NAD+ is required for glycolysis and production of ATP during low oxygen conditions. 2. True or False? Symport & antiport are types of cotransport systems where only one solute moves through the membrane. In symport, both move in same direction. In antiport, one solute goes in one direction and the other in the opposite direction. The Na+K+ ATPase of plasma membrane is an antiport system moving K+ in and Na+ out in ratio of 2 K+ per 3 Na+
Madhur L.
Which statement about pyruvate is not true? $a .$ It is the end product of glycolysis. $b$. It becomes reduced during fermentation. $c .$ It is a precursor of acetyl CoA. $d$. It is a protein. $e .$ It contains three carbon atoms.
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