Photosynthesis and Respiration Review

1. Name 3 components associated with the thylakoid membrane? 1) light-harvesting antennae . 2) electron transport systems and 3) photosystems I and II

2. Chloroplasts have the following: thylakoids; inner membrane stroma; watery chloroplast interior lumen; thylakoid interior grana; stacks of thylakoids

3. When an excited PS II electron leaves its orbit, it first is captured by an electron transport system protein.

4. Which color of light in the visible spectrum least promotes the photosynthetic process? Green

5. Trace the path of an electron in noncyclic photophosphorylation? P680 reaction center; PQ; cytochrome complex; PC; PS700; NADPH

6. P680 ultimately replaces its lost electron from: water.

7. The primary purpose of noncyclic electron flow in PS I is to: reduce NADP+

8. The following are the events which occur in the noncyclic light reactions? Light is absorbed by P680; Chlorophyll a is oxidized; P680 electrons move into the electron transport system and Water is simultaneously oxidized

9. The light-independent reactions are powered by: light reaction products such as ATP and NADPH

10. The Calvin cycle reactions occur in the: stroma.

11. Accessory pigments within chloroplasts are responsible for absorbing photons of different wavelengths of light and passing that energy to reaction center molecules.

12. The reaction which is the first to occur in the Calvin cycle is Rubisco chemically joins CO2 to a 5-carbon compound.

13. CAM plants avoid photorespiration by fixing CO2 into organic acids during the night.

14. Photorespiration is detrimental to a plant because oxygen is fixed to RuBP and the eventual loss of carbon as carbon dioxide

15. An especially efficient carboxylating enzyme used in C4 pathways is PEP carboxylase

16. Respiration differs from photosynthesis in that: it (respiration) is an essentially downhill, exergonic reaction. its reactants have more energy than its products. and glucose is a reactant rather than a product.

17. The final electron acceptor in aerobic respiration is: oxygen.

18. Chloroplasts could make carbohydrate in the dark if provided with ATP and NADPH and CO2.

19. Glycolysis essentially ends with the formation of: pyruvate molecules.

20. ATP supplies the energy of activation necessary to initiate glycolysis reactions.

21. The allosteric enzyme phosphofructokinase is inhibited by: high ATP concentrations. and high citric acid concentrations.

22. The most important contribution of the citric acid cycle in terms of the production of ATP is: the creation of proton gradients.

23. One turn of the citric acid cycle produces: 3 NADH, 1 FADH2, 1 ATP and 2 CO2.

24. The primary energy carrier between the citric acid cycle and the electron transport system is: NADH.

25. At the end of the citric acid cycle, most of the energy of the original glucose molecule is found in: NADH and FADH2.

26. FoF1 and CFoCF1complexes are structures that are thought to: generate 1 ATP for each set of protons that pass through them.

27. What is the net yield of ATP at the end of glycolysis? 2 ATP's

28. In addition to producing energy for phosphorylation reactions, the proton gradient in mitochondria may be used to: transport calcium ions across membranes. generate body heat. move Pi into the mitochondria.

29. Because some yeasts (eukaryotes) are facultative anaerobes, they may metabolize pyruvate: either by aerobic respiration or alcoholic fermentation.

30. Intense activity in vertebrate muscles would be most likely to result in accumulations of: lactic acid.

31. Glycolysis reactions occur within the: cytoplasmic fluids.

32. In a plant with C4 metabolism, malic acid (malate) is first synthesized in ______, then transported to _____. mesophyll cells; bundle-sheath cells

33. The following equation for photosynthesis 6CO2 + 12H2O ----> C6H12O6 + ? , is accurately completed by adding 6O2 + 6H2O

34. Reaction centers of PS I and PS II are sites where: light energy is converted to chemical energy represented by an excited electron.

35. A spectrophotometer measures the absorption spectrum of a substance.