Cellular Transport

Question 1

What is Cytosis?

Answer 1

Cellular membrane pinching off and forming a vesicle. Only happens in Eukaryotes.

Question 2

What is Endocytosis?

Answer 2

Movement INTO the cell. Receptor-Mediated. Ex) Phagocytosis.

Question 3

What is Exocytosis?

Answer 3

Movement OUT of the cell. Vesicle breaks open to environment releasing waste products.

Question 4

What is Passive Diffusion?

Answer 4

Movement of a solute from a region of higher concentration to lower concentration.

Question 5

What is Facilitated Diffusion?

Answer 5

Movement of a solute assisted by permeases. Can be Non-Specific, Specific, or Osmotic (water)

Question 6

What is the function of a Uniporter?

Answer 6

Transporting One solute in One direction

Question 7

What is the function of an Antiporter?

Answer 7

Transport Two solutes in Opposite directions

Question 8

What is the function of a Symporter?

Answer 8

Transport Two solutes in the Same direction

Question 9

What is Simple Transport?

Answer 9

Movement of a solute Against concentration gradient. Driven by proton motive force (H+) or ATP. Solute is not chemically modified during transport.

Question 10

What is Group Translocation?

Answer 10

Only occurs in prokaryotes. Driven by chemical modification of transported substance by phosphoenolpyrivate (PEP)

Question 11

What is the ATP Transport System?

Answer 11

Occurs in Gram - and Gram + cells. Solute binds to protein in periplasmic space. Uses ATP