Which of the following statement(s) is/are correct?

{i}Collagen is the most abundant protein in animals.
{ii}RuBisCO is the most abundant protein in plants.
{iii}Z-DNA is the most common double helical structure found in nature.

Correct option is D

Correct Answer: (d)

Explanation:
Collagen is the most abundant protein in animals, while RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) is the most abundant protein in plants and on Earth. Z-DNA is a rare left-handed DNA form, not the common one — the usual structure in nature is B-DNA.

Information Booster:

-Collagen is a fibrous protein found in connective tissues, bones, tendons, and skin.

-RuBisCO is the key enzyme in carbon fixation during the Calvin cycle.

-Z-DNA is a left-handed double helix that forms transiently during transcription.

-B-DNA (Watson-Crick model) is the right-handed, most stable and common DNA structure.

-A-DNA appears under dehydrated conditions; Z-DNA appears under high salt or GC-rich regions.