Multiple choice

2-Carboxy-D-arabinitol 1-phosphate (CA1P) is synthesized by C4 plants like tobacco and beans in the night. Which of the following functions does it perform?

  1. Enhances the rate of photosynthesis

  2. Forms bonds with CO2 and helps in its storage

  3. Inhibits the catalytic activity of RuBisCo

  4. Incorporates more oxygen into RuBP
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

2-Carboxy-D-arabinitol 1-phosphate (CA1P) inhibits the catalytic activity of RuBisCo at night. RuBisCO activase promotes the release of CA1P from the catalytic sites.

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