Study Questions:

• 1. Write short notes on the following modes of nutrient uptake

  a. Passive or simple diffusion

  b. Facilitated diffusion

  c. ABC transporter mechanism

  d. Proton gradients

2. What is group translocation and how do microorganisms use this method for nutrient uptake

3. Write briefly on iron uptake by microorganisms.

4. Differentiate between Active and Passive transport.

5. Define the terms:

a.  Diffusion.

b.  Osmosis.

c.  Symport.

d.  Antiport

6. Explain the process of Iron uptake.