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3-PGA is first stable product in...

3-PGA is first stable product in

A

Carbon reduction cycle

B

OAA

C

Malic acid

D

PEP

Text Solution

Verified by Experts

The correct Answer is:
A
In `C_(3)` cycle, I presence of rubisco (RuBP carboxylase) `CO_(2)` combines with ribulose 1,5-bisphosphate (acceptor molecule) to form 3-phosphoglyceric acid or 3-PGA which is the first stable product of carbon reduction cycle.
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C_3 //C_4 is a biochemical pathway where double fixation of CO_2 takes place with first stable product being a 4-carbon dicarboxylic acid.

3-PGA is the first step stable product in ...(i) ..and is formed when initial CO.. acceptor ....(iii) ... take CO.. in presence of enzyme RuBisCO.

Knowledge Check

  • 3-PGA is first stable product of

    A
    Carbon oxidation cycle
    B
    Carbon reduction cycle
    C
    Reductive amination
    D
    Malic acid synthesis

  • Assertion :- In all photosynthetic plants first fixa- tion product during biosynthetic phase of photosyn- thesis is PGA. Reason :- PGA is the most stable product and is synthesised from both RuBP and PEP, whenever they act as first CO2 accepting substance.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Which of the follwing cycle shows oxalocation acid as first stable product

    A
    Calvi cycle
    B
    Hatch and Slack cycle `(C_(4))`
    C
    `C_(2)` cycle
    D
    None of the above

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