FIFTEEN PAGES - PAGE THIRTEEN STUDENT NUMBER: \( \qquad \) SECTION C (28 marks) Write your answers to this section IN INK in the spaces provided on the question paper which must be handed in at the end of the examination. Question 5 (12 marks) Place the following molecules labelled A - J under the correct metabolic pathway in which they are found by writing the respective letter in the boxes below. Note that some molecules can be found in more than one pathway and should be placed in all the relevant boxes to receive full marks. A - Pyruvate B - P680 \( { }^{+} \) \( \mathrm{C}-\mathrm{FADH}_{2} \) D - NADPH E-Acetyl CoA F - RuBP G - Plastoquinone H - Glyceraldehyde - 3 - phosphate I-Phosphofructokinase J - Rubisco K - chlorophyll \( a \) L - Succinate Glycolysis Citric acid cycle Light reactions (photosynthesis) Calvin cycle
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Directions: Each group of questions consists of five lettered headings followed by a list of numbered phrases or sentences. For each numbered phrase or sentence, select the one heading that is most closely related to it and fill in the corresponding oval on the answer sheet. Each heading may be used once, more than once, or not at all in each group. Questions $6-9$ (A) Stroma (B) Thylakoids (C) Photolysis (D) Carotenoids (E) Ribulose bisphosphate Contains enzymes of photophosphorylation
1. When the reaction center has sufficient energy, a. electrons move to the stroma. b. water is produced. c. it will glow red. d. it is oxidized. e. All of these. 2. O2 produced by the light-dependent reaction is a. concentrated for later use. b. lost as a waste product. c. part of the light-independent reaction. d. used to make carbohydrates. e. None of these. 3. The Light-Dependent Reactions rely on all of these EXCEPT a. chemiosmosis. b. P680. c. CO2. d. H2O. e. photons. 4. Photosynthesis seems to have processes that are similar to aerobic respiration. The Light-Dependent Reactions are like a. pyruvate oxidation. b. oxidative phosphorylation. c. the Krebs Cycle. d. glycolysis. e. None of these. 5. The process of carbon assimilation is cyclic because a. energy is required. b. ATP is used. c. no membranes are involved. d. it occurs in the stroma. e. RuBP is regenerated.
Md.Daniyal A.
1. the reaction for photosynthesis is like the mirror image of another reaction called A) ATP hydrolysis B) redox reaction C) phosphorylation D) cellular respiration 2. Photosynthesis consists of which two set of reactions that are linked by redox reactions to generate chemical energy A) light capturing reactions and splitting water B) light capturing reactions and chemiosmosis C) light capturing reactions and Kelvin cycle D) light capturing reactions and oxidative phosphorylation 3. The photosynthetic pigments of plant are located in or at the A) cellular cytoplasm B) thylakoid membrane C) stroma D) apoplast 4. To date, in all of biology, only Photosystem II is known to use solar energy to A) provide highly energetic electrons to redox reactions that generate chemical energy B) to provide energy for chemiosmosis C) absorb light of a wavelength between 550 and 600 nm D) produce oxygen by oxidizing (or splitting) water. 5. Rubisco is A) the enzyme that fixes CO2 to RuBP B) a slow enzyme C) an enzyme that can catalyze two different reactions D) All of the above
Marlyn J.
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