Facilitated diffusion allows cells to:
1. achieve uphill transport without ATP energy
2. select substances for uptake
3. stop transport of hydrophilic substances
4. decrease the rate of diffusion of lipophilic substances

In gram negative bacteria the outer membrane:
1. is the major permeability barrier
2. is a thick peptidoglycan layer
3. is more permeable to hydrophilic substances
4. is devoid of lipopolysaccharides

Unlike a symporter and an antiporter, a uniporter:
1. is not an integral membrane protein
2. is a cell surface carbohydrate
3. is not a co-transporter
4. cannot be used for active transport

What differentiates active transport from facilitated diffusion?
I. Uphill transport
II. Requirement of special membrane proteins
III. Selective nature
1. Only I
2. Only I and II
3. Only I and III
4. Only II and III

Consider the following statements:

Correct statements are:
1. I and II
2. I and III
3. II and III
4. I, II and III

Consider the following statements regarding water potential:
I. Water potential is the potential energy of water relative to pure free water (e.g., deionized water)
in reference conditions.
II. Typically, pure water at standard temperature and pressure (or other suitable reference condition) is defined as having a water potential of 0.
III. The addition of solutes to water increases its potential (makes it more negative), just as the increase in pressure lowers its potential (makes it more positive).
The correct statements are:

The pressure that must be applied to a solution to prevent the inward flow of water across a semi permeable membrane is called as:
1. Hydrostatic pressure
2. Water potential
3. Osmotic pressure
4. Osmotic potential

During Plasmolysis:
1. Water is first lost from the cytoplasm and then from the vacuole
2. Water is first lost from the vacuole and then from the cytoplasm
3. Water is lost only from the cytoplasm and not from the vacuole
4. Water is lost only from the vacuole and not from the cytoplasm

For imbibition to occur, affinity between the adsorbant and the liquid is:
1. not essential
2. not essential since imbitition is also a diffusion
3. not essential if occurring against the concentration gradient
4. a pre-requisite

Consider the following statements:
I. In diffusion, different substances move independently of one another depending on their individual concentration gradients.
II. Similarly, in bulk transport, different substances move independently of one another depending on their individual concentration gradients.
III. Bulk flow can be achieved either through a positive hydrostatic pressure or through a negative hydrostatic pressure.
Correct statements are:
1. I, II, III
2. I and II
3. I and III
4. II and III