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Glycolysis
1. What does glycolysis mean (translate it)?
2. Where does glycolysis take place? (p. 122, paragraph 3)
3. What molecule is put into the process (eg. step 1)? What other step is this also seen?
4. What step is responsible for the process being named glycolysis? Describe what is being converted into what.
5. What is significant about the step 6)? What type of reaction is this? What’s happening to some of the energy?
6. What molecule(s) come out of the process (eg. step 7)? What other step is this seen?
7. What do you notice is different between the first few steps and the last five steps?
8. Compare the energy input and energy output of glycolysis.
9. What other products are formed during glycolysis?
10. In what molecule(s) is the bulk of potential energy contained in at the end of glycolysis.
11. Put the following molecules in order of free energy potential: G-3-P, Pyruvate, Glucose
Pyruvate Oxidation
1. Where does the pyruvate from glycolysis head off to? How many pyruvates head here from one glucose?
2. What type of reaction is shown here? How can you tell?
3. What other coenzyme is needed for this reaction?
4. What product is formed in this reaction? How many carbons does it have (from the original pyruvate)? Account for any differences.
5. Which is higher in free energy potential: pyruvate OR acetyl CoA
6. Where did energy transfer go during this reaction?
7. What do you think is the main purpose of this complex reaction (in terms of energy)?
Kreb’s Cycle
1. What molecule is put into Kreb’s Cycle? Where did this molecule come from?
2. What happens in the first step of Kreb’s Cycle?
3. What waste products are given off during the Kreb’s Cycle?
4. How many of these molecules (from Q # 3) have been given off so far in cellular respiration?
5. How many NAD+ molecules are reduced to NADH during Kreb’s Cycle?
6. Are there any other energy carrier molecules produced in Kreb’s Cycle? Is yes, what are they?
7. By what method is ATP produced in Kreb’s Cycle?
8. What do you think is the main purpose of the Kreb’s cycle reactions (in terms of energy)? HINT: What was the main event that repeated itself?
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