Passive Transport

Q. In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:

1. Ammonia
2. Glutamate
3. Nitrates
4. Ureides

Q. Consider the following statements with reference to facilitated diffusion:
(a) Requires ATP energy
(b) Transport saturates
(c) Highly selective
(d) Requires special membrane protein
(e) Uphill transport
Out of the above statements:

1. a, b and c are relevant but d and e are irrelevant
2. b, c and e are relevant but a and d are irrelevant
3. c, d and e are relevant but a and b are irrelevant
4. b, c and d are relevant but a and e are irrelevant

Q. Which one is reabsorbed actively in the nephron?

1. Glucose and amino acid
2. Glucose, amino and Na+
3. Glucose and Na+ only
4. Glucose

Q. Passive transport of molecules across the cell membrane is by

1. osmosis only
2. both diffusion and osmosis
3. diffusion only
4. neither diffusion nor osmosis

Q. Passive transport molecules move from low to high concentration

1. True
2. False

Q. The transport of molecules across the cell membrane without the expenditure of energy is an example of

1. active transport
2. absorption
3. passive transport
4. secretion

Q.

What is it called when water moves against gravity?

Q. When a fresh water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the vacuole will:

1. Increase in size
2. Decrease in size
3. Increase in number
4. Disappear

Q.

Which substance uses a carrier protein to cross the plasma membrane by facilitated diffusion?

Q. The common feature shared both by simple diffusion and facilitated diffusion is

1. both require energy for the transport of substances.
2. both involve the movement of substances from regions of lower concentration to higher concentration without expenditure of energy.
3. both require a special carrier molecule to move substances across the membrane.
4. both involve the movement of substances from regions of higher concentration to lower concentration without expenditure of energy.

Q.

Why does glucose use facilitated diffusion?

Q.

What is meant by active transport?

Q.

Paheli noticed water being pulled up by a motor pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell me why?

Q.

If a cell is placed in an isotonic solution, which will occur?

1. Salts will move into the cell from the surrounding solution

2. Water will move into the cell from the surrounding solution

3. Salts will move out of the cell into the surrounding solution

4. Water will move into and out of the cell at equal rates

Q.

Can facilitated diffusion cause the movement of molecules from a low to high concentration?

Q. Which of the following statement is irrelevant with regards to facilitated transport?

1. It takes place by downhill transport.
2. It is a highly selective process.
3. Requires special membrane proteins.
4. Requires ATP energy.

Q.

What is the process by which roots uptake nutrients?

Q. Water rises to the top in very tall tree due to

1. The capillarity action of water.
2. the atmospheric pressure
3. pumping of water by pressure in roots
4. pulling of water by transpiration in leaves

Q.

How does facilitated diffusion of glucose occur?

Q. Passive transport molecules move from low to high concentration

1. True
2. False

Q.

What is the difference between diffusion and active transport?

Q.

Differentiate between active transport and passive transport?

Q. During phloem transportation sugar is moved in form of sucrose in to the companion cells and them into the living phloem sieve tube cells by -

1. Passive transport
2. Active transport
3. Facilitated diffusion
4. Osmosis

Q.

What is the drawback of active transport?

Q. How does the pct proximal convoluted tubule of the nephron contribute in Homeostasis?

Q. Active and passive transports across cell membrane differ in

1. Passive transport is along the concentration gradient while active transport is due to metabolic energy
2. Passive transport is non-selective
3. Active transport is more rapid
4. Passive transport is confined to anions while active transport in confined to cations.

Q. How do substances like $C{O}_2$ and water move in and out of the cell? Discuss.

Q.

What are 2 types of cell transport?

Q. What is primary and secondary active transport ?

Q. Sucrose moves into sieve tube elements by?

1. Diffusion
2. Endosmosis
3. Active transport
4. Exosmosis