Select the correct option:
When $C_{2}$ is added to PEP, the first stable product synthesised is

pyruvate

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glyceraldehyde-3-phosphate

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phosphoglycerate

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oxaloacetate

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Solution

The correct option is C oxaloacetate
In $C_{4}$ plants, initial fixation of $C O_{2}$ or carboxylation occurs in mesophyll cells. The chloroplasts of mesophyll cells possess enzyme PEP carboxylase (or PEP case) for initial fixation of $C O_{2}$ .The primary acceptor of $C O_{2}$ is phosphoenol pyruvate or PEP. It combines with $C O_{2}$ in the presence of PEP carboxylase (or PEP case) to form oxaloacetic acid or oxallocetate (OAA). So, the correct answer is 'oxaloacetate'.

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Similar questions

When CO₂ is added to PEP, the first stable product synthesised is

Question 14
When $C O_{2}$ is added to PEP, the first stable product synthesised is
(a) pyruvate (b) glyceraldehyde-3-phosphate
(c) phosphoglycerate (d) oxaloacetate

Q. Which of the following characteristics out of I, II and III are exhibited by

C_{4}

plants?
I. Kranz anatomy.
II. The first stable product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option.

Q. The

C O_{2}

acceptor, carboxylating enzyme and first stable product produced in mesophyll cells of

C_{4}

plants are ____ respectively.

Q. Consider the following statement regarding starch and sucrose synthesis during day time and select the correct ones.
(i) Triose phosphate is confined to chloroplast and is utilized for the synthesis of starch only.
(ii) Triose phosphate is trans located to cytosol from chloroplast.
(iii) Triose phosphate is utilised for the synthesis of both starch and sucrose.
(iv) Triose phosphate is trans located from cytosol to chloroplast.

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Select the correct option:When C2 is added to PEP, the first stable product synthesised is

Select the correct option:
When $C_{2}$ is added to PEP, the first stable product synthesised is