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Author Question: Describe/summarize the four major stages of catabolism. ... (Read 173 times)

genevieve1028

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Describe/summarize the four major stages of catabolism.

Question 2

What percentage of people in poor countries do not have enough to eat?
 a. 12
  b. 14
  c. 16
  d. 18



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durant1234

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Answer to Question 1

 Stage 1: complex molecules are broken down into their fundamental building blocks.
glycogenolysis  glycogen  glucose
proteolysis  protein  amino acids
lipolysis  triglycerides  fatty acids and glycerol molecules
 Stage 2: glucose, amino acids, fatty acids, and glycerol enter specific pathways in which each is converted into an intermediate product that can enter the citric acid cycle.
 Stage 3: intermediate products formed during Stage 2 enter the citric acid cycle and are broken down further to form carbon dioxide, releasing energy in the process. Much of the energy released during Stage 3 of metabolism is transferred to the coenzymes NAD+ and FAD, forming NADH + H+ and FADH2, respectively. In addition, small amounts of ATP are formed via substrate phosphorylation.
 Stage 4: begins when NADH + H+ and FADH2 enter the electron transport chain. The energy-yielding pathways of oxidative phosphorylation operate in nearly all cells to produce energy for cellular activities.

Answer to Question 2

c




genevieve1028

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Reply 2 on: Aug 20, 2018
YES! Correct, THANKS for helping me on my review


amynguyen1221

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Reply 3 on: Yesterday
Excellent

 

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