What are the main functions of proteins in living things?

Answer 1

Structural and functional

Functional: enzymes that aid in metabolic reactions; antibodies that cling to antigens, assisting the immune system in its work; complement system to support the WBC in the immune system; hemoglobin in RBC to carry oxygen and CO2; myoglobin in muscle cells to store oxygen; structural: proteins in the muscle cells that cause contraction; proteins in the cell membrane; proteins in the cytoskeleton of the cell;

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Answer 2

Easton Bailey

Main roles for proteins in living things include defense, enzymatic catalysis, transportation, structural support, and cellular process regulation.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.