Roles of organelles in transporting proteins by exocytosis Flashcards Preview

U3 Bio: How do cells maintain life? > Roles of organelles in transporting proteins by exocytosis > Flashcards

Flashcards in Roles of organelles in transporting proteins by exocytosis Deck (15)
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1
Q

STructure of ribosomes?

A

2/3 RNA and 1/3 protein. Non membrane bound and very small (but many).

2
Q

Function of ribosomes?

A

site of protein synthesis; amino acids are joined to form polypeptide chians.

3
Q

Proteins made within the ribosomes attached to the rough ER are usually…

A

transported to other cells

4
Q

Proteins made within ribosomes in the cytosol are usually…

A

used within the cell

5
Q

OVerall structure of ER?

A

interconnect system of membrane bound flattened channels.

6
Q

STructure of rough ER?

A

has ribosomes attached to surface

7
Q

Function of rough ER?

A

transports proteins to various sites (via its channels) and processes proteins by:
 Adding sugars to form glycoproteins
 Folding proteins into correct functional shape
 Assembling complex proteins by linking together polypeptide chains

8
Q

STructure of smooth ER?

A

lipid and steroid synthesis

9
Q

Function of transition vesicles?

A

transport proteins from the rough ER to the golgi apparatus

10
Q

Structure of golgi apparatus?

A

multilayered stacks of membrane bound channels, but not necessarily joined

11
Q

Function of golgi apparatus?

A

Receives proteins transported from rough ER in transition vesicles. Then concentrates and packages the proteins into secretory vesicles

12
Q

Function of secretory vesicles?

A

fuse with the plasma membrane, allowing the contents to be released into the cytosol.

13
Q

Flow chart of how proteins exit the cell?

A

Ribosomes in rough ER form proteins -> transition vesicle -> golgi apparatus -> secretory vesicles -> outside of cell

14
Q

the rRNA and protein parts of a ribosome are aka

A

large subunit and small subunit

15
Q

Define: organelle

A

specialised subunits within a cell with a specific function.