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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
Radioactive $C^{14}$ is given to carbon dioxide and released to atmosphere. This carbon dioxide is taken by $RuBP$ in a $C_{3}$-plants. First radioactive $C^{14}$ is seen, in which compound?
  • A
    $PGAL$
  • B
    $PEP$
  • C
    $RMP$
  • ✓
    $PGA$
✓

Answer

Correct option: D.
$PGA$
d
$C ^{14}$ Is an isotope of carbon. It has been used to draw the path of carbon fixation in the process of photosynthesis. This lebelled $C^{14}$ becomes incorporated with ${ }^{14} CO _{2}$, which is accepted by $RuBP$ and $3$ carbon compounds, phosphoglyceric acid $(3-PGA)$ is formed. $3-PGA$ is the first stable compound.

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