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Biochemistry Proteins and Amino Acids 531162d4

Proteins are transported into the cell by?

A
Pinocytosis
B
Osmosis
C
Active diffusion
D
Passive diffusion
High-Yield Explanation
Ans. a (Pinocytosis). (Ref. Ganong, Physiology, 21st/pg.29)Pinocytosis ("Cell drinking")# It is the process by which proteins are taken into the cell. The substance ingested are insoluble & not seen by microscope.# Endocytosis: It is a process by which a molecule is taken into the cell.# Endocytosis can be of 2 types: Phagocytosis & pinocytosis.# Endocytosis can be constitutive or clathrin-mediated, which is responsible for internalisation of many receptors & ligands binding to them. e.g. NGF, LDL, Synaptic function.

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