Multiple choice

In the C4 cycle, carbon dioxide is absorbed by ______________.

  1. oxaloacetic acid

  2. phosphoenol pyruvic acid

  3. malic acid

  4. ribulose biphosphate

  5. phosphoglyceraldehyde

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phosphoenol pyruvic acid absorbs the carbon dioxide in the mesophyll cells and converts it into oxaloacetic acid in the C4 cycle.