Endoplasmic Reticulum (ER) Flashcards
1
Q
What is ER?
A
A system of membranes that runs through the cytoplasm
2
Q
How are the membranes in ER arranged?
A
They are formed into flattened membrane bound sacs, called cisternae
3
Q
The membranes are continuous with what?
A
The outer nuclear envelope
4
Q
What is the structural difference between rough ER and smooth ER?
A
Rough - is studded with ribosomes
Smooth - no ribosomes attatched
5
Q
What is the function of rough ER? (2)
A
- It transports proteins made by the attached ribosomes
2. Provides LSA for protein synthesis
6
Q
Where can ER transport protein? (2)
A
- Around the cell
2. It can be secreted outside
7
Q
What is the function of Smooth ER?
A
It is responsible for steroid and lipid synthesis
8
Q
Is ER surrounded by a membrane?
A
Yes
9
Q
Is it found in eukaryotic or Plant cells?
A
Both
