The first stable product of CO₂ fixation in C4 plants is

Question

Accepted Answer

B. OAA (oxaloacetate, 4 carbons)

C4 plants fix CO₂ first as OAA, a 4-carbon compound (hence the name).
Concentrates CO₂ near RuBisCO in bundle-sheath cells, suppressing photorespiration.
C3 plants make 3-PGA directly.

Answer

3-PGA (3 carbons)

Answer

G3P

Answer

Pyruvate

The first stable product of CO₂ fixation in C4 plants is

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