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Question

.......... are the most abundant protein in the living world.
  1. Ribozyme of plants and collagen of animals
  2. RuBisCO of plants and collagen of animals
  3. PEPcase of plants and keratin of animals
  4. Alcohol dehydrogenase of plants and melanin of animals

A
Ribozyme of plants and collagen of animals
B
PEPcase of plants and keratin of animals
C
RuBisCO of plants and collagen of animals
D
Alcohol dehydrogenase of plants and melanin of animals
Solution
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RuBisCO is the most abundant enzyme which is used to fix carbon during dark reaction of the photosynthesis. It is a primary acceptor of carbon dioxide during Calvin cycle. It is also known as Ribulose-1,5-bisphosphate carboxylase/oxygenase. It fixes the carbon dioxide to 3-phosphoglycerate. It also accepts oxygen during photorespiration and forms phosphoglycolate and 3-phosphoglycerate.
Collagen is an amino acid protein. It is a structural protein. It is mostly found in tendon, ligament, and skin. 90% collagen is present in the animal cells.
So, the correct answer is option B.

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