a level biology help

is exocytosis just the last stage of making a protein? because the definition of it is just when the vesicle fuses with the plasma membrane and releases its contents

Reply 1

cr7090121

Original post by gfhrhrhrjjrshrsj

is exocytosis just the last stage of making a protein? because the definition of it is just when the vesicle fuses with the plasma membrane and releases its contents

what exam board u doin ? because exocytosis is just a form of active transport diffisuion of particles to. the outside of the cell I don't recall this being involved in aqa bio in protein synthesis at all

(edited 6 months ago)

Reply 2

bl0bf1sh

Original post by gfhrhrhrjjrshrsj

is exocytosis just the last stage of making a protein? because the definition of it is just when the vesicle fuses with the plasma membrane and releases its contents

Exocytosis is just the way that materials are moved from inside a cell to outside. Endocytosis is the opposite (phagocytosis is one example).

In exocytosis, a vesicle (a membrane-bound compartment) containing the substances fuses with the cell membrane, and the contents are released into the extracellular fluid. These contents could be proteins, but they could also be other things such as neurotransmitters at a synapse.

This video has a decent overview of the process of exocytosis in relation to protein synthesis – basically, once a protein has been made, it might be needed outside the cell (rather than inside), so there needs to be a method to release them. This method = exocytosis.