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STD 11 - 11. photosynthesis in higher plants — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 11. photosynthesis in higher plants4 Marks
MCQ
Identify the correct sequence of enzymes given below which participate in the regeneration phase of Calvin cycle.

$I.$ Ribulose-$5$-phosphate isomerase    $II.$ Ribulose-$5$-phosphate epimerase

$III.$ Transketolase    $IV.$ Triose phosphate isomerase

  • A
    $VI, I, III, II$
  • B
    $III, IV, II, I$
  • ✓
    $IV, III, I, II$
  • D
    $II, I, IV, III$
✓

Answer

Correct option: C.
$IV, III, I, II$
c
Triose phosphate isomerase enzyme converts glyceraldehydes-$3$ phase molecule into dihydroxy acetone phosphate. Then an enzyme transketolase comes, which acts on sedoheptulose-$7$-phosphate molecule and changes it into ribulose-$5$-phosphate and xylulose-$5$-phosphate. Then ribulose-$5$-phosphate isomerase enzyme comes and acts on ribulose-$5$-phosphate. This reactionhas a molecule of ribulose-$5$-phosphate, while xylulose-$5$-phosphate molecule is also converted into ribulose-$5$-phosphate by ab other enzyme, ribulose-5phosphate epimerase.

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