Endoplasmic reticulum

Question 1

ER

Answer 1

• complex system of parallel double
  membrane, which form flattened sacs
  - interconnected fluid-filled spaces
  between them
  - cisternae
• connected with the nuclear envelope
  - allows transport of materials
  through the cell

Question 2

Rough ER - function

Answer 2

package the polypeptide created by the ribosomes into vesicles and transport them to the golgi body

Question 3

Rough ER - structure

Answer 3

• has ribosomes which synthesises the
  polypeptide chain
  - which are threaded into the cisternae,
  bends to form 3D shape
• part of the membrane breaks off to create
  vesicles
  - carry the polypeptide chain to
  the golgi body

Question 4

Smooth ER - structure

Answer 4

• have membrane without ribosomes
• enzymes on the surface catalyses the
  synthesis of lipids
• cells responsible for secreting / producing
  hormones include large number of
  smooth ER