Multiple choice

Most abundant protein in the world is _________.

  1. albumin

  2. collagen

  3. osteocalcin

  4. RuBisCO

  5. keratin

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

RuBisCO (Ribulose-1, 5-bisphosphate carboxylase) is thought to be the most abundant protein in the world, since it is present in every plant that undergoes photosynthesis and molecular synthesis through Calvin cycle.