Multiple choice

The most abundant protein found on Earth is

  1. PEP caroxylase

  2. RUBISCO

  3. Aldolase

  4. Transketolase

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

RUBISCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) is Earths most abundant protein. It catalyzes carbon fixation in photosynthetic organisms plants, algae, cyanobacteria comprising up to 50% of leaf soluble protein.