Active Transport

Q. Atrial natriuretic factor (ANF) is released in response to the increase in blood volume and blood pressure. Which of the following is not the function of ANF?

1. Stimulates salt loss in urine.
2. Inhibits the release of renin from juxtaglomerular apparatus.
3. Stimulates aldosterone secretion.
4. Inhibits sodium reabsorption from collecting duct.

Q.

What is the role of protein pumps in active transport?

Q.

Which one of the following is not a characteristic of active transport?

1. Transport saturates

2. Highly selective

3. Uphill transport

4. Insensitive to inhibitors

Q.

Which of the following requires energy from ATP molecules?

1. Diffusion

2. Active Transport

3. Pinocytosis

4. Osmosis

Q.

Of all the passive processes, the only one that does not require a concentration gradient is

1. bulk filtration

2. facilitated diffusion

3. diffusion

4. osmosis

Q.

When molecules move from the area of lower concentration to the area of higher concentration and energy is used, it is called

1. filtration

2. passive transport

3. active transport

4. osmosis

Q.

Name the following

Minerals from the soil are absorbed by this process.

Q. Read the statements given below carefully and determine their validity by choosing the correct option.
I. Carrier proteins are used in active transport.
II. These carrier proteins use ATP to transport molecules along the concentration gradient of cell membrane.

1. Both I and II are correct and II is the correct explanation of I.
2. Both I and II are correct, but II is not the correct explanation of I.
3. I is correct but II is wrong.
4. Both I and II are wrong.

Q. ${\mathrm{Na}}^{+}-K^{+}$ pumps work by

1. transporting 3${\mathrm{Na}}^{+}$ in and 2$K^{+}$ out of the cell membrane
2. transporting 2${\mathrm{Na}}^{+}$ out and 3$K^{+}$ into the cell membrane
3. transporting 3${\mathrm{Na}}^{+}$ out and 2$K^{+}$ into the cell membrane
4. transporting 2${\mathrm{Na}}^{+}$ in and 3$K^{+}$ out of the cell membrane

Q.

Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against it's concentration gradient.

1. A is true and R is false

2. Both A & R are true and R doesn't explain A

3. Both A & R are false

4. Both A & R are true and R explains A

Q.

Does active transport use energy?

Q. Which of the following transmembrane proteins consume ATP?

1. Gated channel proteins
2. Channel proteins
3. Carrier proteins
4. Pumps

Q.

is ATP is required for the movement of polar molecules by carrier protiens in plasma membrane??

Q.

Describethe role played by protein pumps during active transport in plants.

Q. In the active transport, carrier proteins are used, which use the energy in the form of ATP, to________

1. transport molecules against the concentration gradient of the cell wall
2. transport molecules along the concentration gradient of the cell membrane
3. transport molecules against the concentration gradient of the cell membrane
4. transport molecules along the concentration gradient of cell wall

Q.

Specific ions are acquired by root hairs against the concentration gradient by ___________.

1. simple diffusion

2. osmosis

3. active transport

4. facilitated diffusion

Q. The sodium- potassium requires energy to move sodium and potassium ions across the cell membrane. Which of these describes the process used by the sodium-potassium pump?

1. Osmosis
2. Diffusion
3. Active transport
4. Photosynthesis

Q.

what is meant by uphill transport?

Q. Which among the following are reabsorbed actively?
Glucose, amino acids, water, nitrogenous waste, $N{a}^{+}$

1. Glucose and amino acids
2. Nitrogenous wastes only
3. Glucose, amino acids, $N{a}^{+}$
4. Water, glucose, amino acids, Na+

Q. Procambium produces

1. Epidermis
2. Pith
3. Vascular bundle
4. Vascular bundle and pith

Q. Active transport is characterized by

1. the requirement of special proteins
2. being highly selective of the molecules transported
3. the expenditure of ATP
4. all of the above

Q. diffusion is a slow process and is not dependent on a living system why?

Q.

Explain the processes of reabsorption and secretion of major substances at different parts of nephron with the help of schematic digram.

Q.

Describe the role played by protein pumps during active transport in plants.

Q.

Na⁺/K⁺ pump in a cell is an example of

1. Passive transport

2. Osmosis

3. Active transport

4. Diffusion