Name of the student :…………………………………………………..
1. Which of the following is not an intermediate in Calvin cycle ?
(a) Ribose-5-P (b) G-3-P (c) Ribulose-1-P (d) Erythrose-4-P
2. In 4 Calvin cycles the number of Ribulose-1,5-BP formed is
(a) 0 (b) 1 (c) 2 (d) all wrong
3. During sucrose biosynthesis the direction of Pi transport by Pi – TP antiporter is
(a) stroma to cytosol (b) lumen to stroma (c) cytosol to stroma (d) all
4. Which enzymatic step ( excluding transport ) in photorespiration utilizes THF as the cofactor ?
(a) 4th (b) 5th (c) 6th (d) 7th
5. Which enzyme involved in CO2 fixation in C4 plants is not regulated by light ?
(a) Malate dehydrogenase (b) Malic enzyme (c) PEP carboxylase (d) Pyr phosphate dikinase
6. The pathway of CO2 fixation in a C4 plants has ____ enzymatic steps
(a) 4 (b) 5 (c) 6 (d) 7
( The rubisco reaction has been counted )
7. Which enzyme catalyzes the liberation of CO2 in a C4 plant ?
(a) Malate dehydrogenase (b) Malic enzyme (c) PEP carboxylase (d) Pyr phosphate dikinase
8. In photorespiration fixation of 2 molecules of O2 gives _____ molecules of C3 .
(a) 1 (b) 2 (3) (d) 4; the correct answer is 3, but it has been cancelled because of mistake in the question.
9. The most abundant protein in mitochondria of a spinach plant is
(a) PEP carboxylase (b) glycine decarboxylase (c) Rubisco (d) None
10. In photorespiration Calvin cycle is gradually slowed down because of decreasing supply of
(a) NADPH (b) ATP (c) RuBP (d) b + c
11. Regeneration of RuBP from TP in stage 3 of Calvin cycle is accomplished in ___ distinct steps.
(a) 7 (b) 8 (c) 9 (d) 10
12. Which statement is not true about the effect of photosynthesis?
(a) Mg++ concentration increases in stroma (b) Mg++ concentration decreases in stroma (c) H+ concentration decreases in stroma (d) All
13. Which of the followings is not different for C3 and C4 plants ?
(a) carbon intermediates (b) ATP consumed (c) specificity for O2 (d) Calvin cycle
14. For C4 plants which statement is more accurate ?
(a) CO2 fixation and Calvin cycle are spatially separated (b) CO2 capture and Calvin cycle are spatially separated ( CO2 is captured in mesophyll cells and fixed in Calvin cycle in bundle sheath.)
2 comments:
Sir,i have a comment.In last question,Lehininger has clearly stated that carbondioxide fixation and calvin cycle are spatially seperated.So, i think first option might be correct.
Dear Kumar :
Use of capture removes confusion which can be created by fixation, because it is done twice. The first fixation is not really fixation. It captures CO2 from mesophhyll cells and brings it to the Calvin cycle in bundle - sheath. Therefore, I conclude that (b) is more accurate.
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