Translocation of Minerals

Q.

Assertion (A): Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

Reason (R): Xylem transports only inorganic nutrients and phloem transports only organic nutrients.

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

2. Both A & R are true and R does not explain A

3. Both A & R are false

4. A is true and R is false

Q.

Explain the pressure-flow hypothesis of translocation of sugars in plants.

Q. Which of the following is false about amides?

1. Amides are transported by phloem
2. They are amino acid derivatives in which OH of COOH is replaced by another NH${}_2$ group
3. Asparagine and glutamine are amides
4. Amides have more nitrogen than amino acids

Q.

Explain pressure flow hypothesis of translocation of sugars in plants.

Q. Which of the following is not an example for short distance transport?

1. Diffusion
2. Facilitated diffusion
3. Translocation
4. Active transport

Q. Phloem unloading refers to

1. sugar diffuse into the companion cells of the phloem through plasmodesmata
2. movement of sucrose from companion cells to living sieve tube cells
3. movement of solutes from companion cells into sink
4. movement of sucrose out of the phloem sap into the cells

Q.

Small amounts of monosaccharides like glucose, amino acids and some of electrolytes like chloride ions are absorbed by (i). However, some of the substances like fructose and some amino acids are absorbed by the mechanism called (ii). Various nutrients like amino acids and electrolytes like Na+ are absorbed into the blood by (iii).

a) i) facilitated transport ii) active transport iii) simple diffusion

b) i) simple diffusion ii) facilitated transport iii) active transport

c) i) active transport ii) facilitated transport iii) simple diffusion

d) i) simple diffusion ii) active transport iii) facilitated transport

Q. Which property of the pigment is responsible for its ability to
initiate the process of photosynthesis? Why is the rate of
photosynthesis higher in the red and blue regions of the
spectrum of light?

Q. Phloem loading refers to

1. movement of sucrose from companion cells to living sieve tube cells
2. movement of solutes from companion cells into sink
3. sugar diffuse into the companion cells of the phloem through plasmodesmata
4. movement of sucrose out of the phloem sap into the cells

Q.

Discuss the factors responsible for ascent of xylem sap in plants.

Q. explain the physical properties of water that help in the ascent of xylem sap by transpiration.
my exam is tomorrow pls reply fast. .....

Q. Phloem loading refers to

1. movement of sucrose from companion cells to living sieve tube cells
2. movement of solutes from companion cells into sink
3. movement of sucrose out of the phloem sap into the cells
4. sugar diffuse into the companion cells of the phloem through plasmodesmata

Q. Translocation can be best described as

1. ascent of water
2. transport of substances through xylem and phloem over long distances
3. movement of food by phloem
4. loss of water through stomata

Q. The element that is not remobilized from one part of the plant to another is .

1. nitrogen
2. phosphorous
3. calcium
4. potassium

Q. Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

1. True
2. False

Q. The speed of water absorption will be greater if

1. the difference between osmotic pressure of soil water and that of xylem vessels is always less
2. there is no difference between osmotic pressure of soil water and that of xylem vessels
3. the difference between osmotic pressure of soil water and that of xylem vessels is always more
4. the water potential of soil water is always less than that of xylem vessels

Q.

Assertion (A): Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

Reason (R): Xylem transports only inorganic nutrients and phloem transports only organic nutrients.

1. Both A $\&$ R are true and R explains A

2. Both A & R are true and R does not explain A

3. A is true and R is false

4. Both A & R are false

Q. Phloem unloading refers to

1. movement of sucrose from companion cells to living sieve tube cells
2. movement of solutes from companion cells into sink
3. movement of sucrose out of the phloem sap into the cells
4. sugar diffuse into the companion cells of the phloem through plasmodesmata

Q.

What is meant by ascent of sap ?

Q. Phloem loading refers to

1. movement of sucrose from companion cells to living sieve tube cells
2. movement of solutes from companion cells into sink
3. movement of sucrose out of the phloem sap into the cells
4. sugar diffuse into the companion cells of the phloem through plasmodesmata

Q. Which of the following is not an example for short distance transport?

1. Diffusion
2. Facilitated diffusion
3. Translocation
4. Active transport

Q. Match the columns :

1. A - 3, B- 4, C - 1, D - 2
2. A - 4, B- 3, C - 1, D - 2
   
3. A - 1, B- 3, C - 2, D - 4
   
4. A - 2, B- 1, C - 3, D - 4
   

Q. Sucking water through a drinking straw is most like

1. guttation
2. ascent of sap in xylem
3. translocation in phloem
4. diffusion

Q. Differentiate between.
Facilitated diffusion and active transport

Q. By which process absorbed water reaches upto the leaves?

1. Transpiration
2. Photosynthesis
3. Nitrogen fixation
4. None of the above

Q. The speed of water absorption will be greater if

1. the difference between osmotic pressure of soil water and that of xylem vessels is always less
2. there is no difference between osmotic pressure of soil water and that of xylem vessels
3. the difference between osmotic pressure of soil water and that of xylem vessels is always more
4. the water potential of soil water is always less than that of xylem vessels

Q. Long distance transport of substance in plants through xylem and phloem is called:

1. Diffusion
2. Translocation
3. Ascent of sap
4. Transpiration

Q.

Differentiate between the following pairs on the basis of what is mentioned in brackets:

Active Transport and Diffusion [significance in plants].

Q. ${10}^{-6}$Movement of a molecule across a typical plant cell (about 50 µm) takes approximately 2.5 s, at this rate can you calculate how many years it would take for the movement of molecules over a distance of 1 m within a plant by diffusion alone?

Q. All mineral are passively absorbed by the roots.

1. True
2. False