Multiple choice

Why is rubisco vital in photosynthesis?

  1. It's a catalyst that increase CO2 in the calvin cycle

  2. It's a catalyst that decreases oxygen in the calvin cycle

  3. It's a catalyst that reduces the CO2 in the calvin cycle

  4. It's a catalyst that increases oxygen in the calvin cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rubisco is vital because it catalyzes the first step of carbon fixation in the Calvin cycle, incorporating inorganic carbon dioxide into an organic molecule (reducing/fixing CO2). Without this enzyme, autotrophs could not convert atmospheric carbon into sugars.

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