protein transport- 1b

Question 1

step 1 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 1

amino acids are joined together to form a polypeptide chain on a ribosome attached to the rough ER

Question 2

step 2 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 2

the polypeptide passes through the cisternae membrane and into the lumen of the rough ER where the polypeptide folds into its 3D shape (protein)

Question 3

step 3 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 3

ER packages proteins into ER vesicles which transport the protein to golgi apparatus/body

Question 4

step 4 of role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 4

ER vesicles fuse with golgi apparatus membrane to become part of the golgi apparatus

Question 5

step 5 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 5

protein enters the golgi body and is modified as the protein moves through the golgi body

Question 6

step 6 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 6

the proteins are packaged into a golgi secretory vesicle for transport through the cell cytoplasm

Question 7

step 7 of the role of the rER and Golgi apparatus in the formation and transport of an extracellular protein

Answer 7

this vesicle moves to the cell surface membrane, fuses with it and the proteins exit the cell by the process of exocytosis

Question 8

define extra cellular enzyme

Answer 8

A biological catalyst which speeds up a chemical reaction (by lowering the activation energy) outside a cell.