27. Give 4 types of proteins and their
functions in the living organisms. [4]
Answer:
A)
Types
of protein function:
-catalytic enzymatic to catalyze biological
reactions.
-to transport oxygen and carbon dioxide in
the blood circulation (haemoglobin).
-to transport other substances to other
part of the cells or within the cells.
-regulatory/ messenger/ hormone
coordination of cellular activities through messenger molecules (insulin).
-storage for molecules required by the
organism (ovalbumin-storage for amino acid; calmodulin-storage for calcium;
ferritin-storage for iron).
-structural for support of organisms
(cocoon, hair, skin, keratin).
-immune/ defense/ protection against
diseases ( antibodies).
-receptor response of cells to chemical
stimuli.
-contractile and motor, for movement and
mobility (actin & myosin).
-act as hydrolytic enzymes.
-visual protein for vision.
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