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BIOLOGY 110
STUDY QUIZ #4
1. List and define the three components of an ATP molecule.
2. What is ATP used for?
3. Diagram and explain the ATP/ADP cycle.
4. What is phosporylation. What happens to the store of energy within a molecule when it
phosphorylated?
5. What is an electron transport system?
6. Write out the formula for photosynthesis. Be sure to show how many molecules of each
reactant and product are used or produced.
7. In question #6, which of the molecules in the photosynthesis formula is energy richrich and
which is energy noor?
8. Energywise, what is it that green plants can do that no other organisms can?
9. Explain and diagram cyclic photophosphorylation using these terms:
photsynthetic unit
reaction center
photons
antenna molecules
acceptor molecules
energized electron
ATP
ADP
phosphate groups
10. Why is the above process cyclic?
11. Are the same high energy compounds produced in cyclic- and
non-cyclicphotophosphorylation? Identify them. What is the other chemical use for
NAPH?
12. What 3 biochemical processes make up photosynthesis? Why is it essential that the first two
processes occur before the third? Why is the Calvin cycle called the Dark Reactions?
13. Explain the four steps of the Calvin cycle. Be sure to show the roles of these compounds:
.C02, RuDp, PGA, PGAL, glucose.
15. Explain the significance of coupling in the 3rd step of glycolysis. Be sure to use the terms
oxidation, phosphorylation, exergonic, endegonic, substrate level phosphorylation, and
coupling in your explanation.
16. What is the role of NAD+ and NADH in the 3rd step of glycolysis and in fermentation?
17. What is the significance of ATP in the 1 st step of glycolysis?
18. Why must the total numbers of ATPs produced in glycolysis have to be explained in terms of
net ATPs?
19. What is the significance of anaerobic conditions to glycolysis? Where does glycolysis occur in
the cell?
20. Using formulas, show the difference between fermentation in plants and in animals. What
makes the products different in these two types of cells?
21. What is the name of the intermediate step between glycolysis and the Kreb's cycle under
aerobic conditions? What makes acetic acid activated? Explain the role of NAD+ in this
reaction.
22. Diagram the Kreb's cycle. In the oxidation of one molecule of glucose, how many acetyl CoAs
are available to feed into the cycle?
23. How many of each of the following are produced in one turn of the Kreb's cycle? Two turns?
C02
Hs
ATP
NADH
FADH2
What happens to the Hs that are produced?
24. Explain how ATP is produced in the Kreb's cycle.
25. Summarize where the 12 NADHs and FADH2s come from in all of the biochemical pathways
that we have discussed.
26. What is the respiratory electron transport chain? Explain how each of the 12 molecules in
question #25 is fed into the chain and how many
ATPs are formed as a result.
27. Explain exactly where in the cell each of the biochemical pathways that we have discussed
occurs and tell whether is it anaerobic or aerobic.
28. Summarize the production of all 36 ATP molecules. Which ones are produced anerobically?