Diffusion

Q.

How do substances like CO₂ and water move in and out of the cell?

Q.

A semipermeable membrane allows the diffusion of

1. none of the above

2. solutes

3. Solvent

4. Both solvent and solutes

Q. Majority of the minerals are absorbed by active transport because ________.

1. Minerals are present in the form of ions in the soil

2. The concentration of minerals is more in the root than soil

3. Charged particles can not move across cell membranes

4. All of these

Q.

The method of transport of materials in single-celled and simple multicellular plants is

1. Active transport

2. Osmosis

3. Diffusion

4. Transpiration

Q.

Diffusion is based on the tendency of molecules to move from a higher concentration to a lower concentration. This process requires assistance in form of energy.

1. True

2. False

Q.

Absorption of water along with mineral solutes mostly take place through maturation region of the root tip.

1. True

2. False

Q.

Roots hairs help to absorb water -Give reasons

Q.

Osmosis takes place in the presence of a semi permeable membrane. True or false?

1. True

2. False

Q. Nisha placed a balsam plant in a beaker of red water. After 2 days, she cut the stem of the plant and noticed that the tubes found in the stem had turned red. From this experiment, what can Nisha conclude about the function of tubes?

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1. Contain the green pigment that is needed to make food
2. Absorb water and mineral salts for the plant
3. Store food for the plant
4. Transport water from the roots to the other parts of the plant

Q. Diffusion occurs from a region of lower concentration to higher concentration.

1. False
2. True

Q.

Which of these factors affect the rate of diffusion?

1. pH

2. Molecular weight

3. Concentration of molecules

4. Temperature

Q.

Statement A: In diffusion, molecules move in a random fashion.

Statement R: Diffusion can be both uphill and downhill.

1. if A is true but R is false

2. if both A and R are false.

3. if both A and R are true and R is the correct explanation of A

4. if both A and R are true but R is not the correct explanation of A

Q. Active transport occurs in the direction same as that of diffusion.

1. False
2. True

Q. Graphical representation of Grahams law of diffusion

Q. Diffusion occurs when molecules move:

1. From higher to lower concentration
2. From higher to lower concentration across a semipermeable membrane
3. From lower to higher concentration
4. From higher to lower concentration using energy

Q.

Which of the following is an example of absorption in plants?

1. Wilting of flower

2. Water droplets on leaf

3. Activity of root hairs

4. Loss of water through stomata

Q.

In higher plants water rises upwards due to _________________.

1. Diffusion

2. Osmosis

3. Transpiration pull

4. Root pressure

Q.

___ is the phenomenon of diffusion of solvent molecules across a semi-permeable membrane.

Q.

What are active and passive transport..please explain me in layman language

Q.

Name the blood vessel that brings oxygenated blood to the human heart.

Q.

Diffusion is the movement of molecules from a place of higher concentration to a place of lower concentration in liquid, solid, or gaseous state.

1. True
2. False

Q.

The process of intake of soluble food materials by plants is called ___

1. Adsorption

2. Osmosis

3. Absorption

4. Diffusion

Q.

The movement of molecules of matter from a region of higher concentration to a region of lower concentration is called ___

Q.

Which of the following is true regarding the process of diffusion?

1. It occurs when the concentration of molecules remains constant.

2. It occurs from a region of higher concentration to a region of lower concentration.

3. It occurs from a region of lower concentration to a region of higher concentration.

4. All of the above

Q.

Define the following- Diffusion

Q. Diffusion can take place in an open system or across a membrane that separates two systems.

1. False
2. True

Q.

Short distance diffusion can happen between which of the following?

1. Between the cells

2. Within the cells

3. From intercellular spaces to cells

4. Only A and B

Q.

Identify and name the movement of molecules from a region of high concentration to a region of low concentration.

Q.

Rate of diffusion across the cell membrane depends on which of the following factors?

1. Size of the substances

2. Solubility in lipids

3. Concentration gradient

4. Living system

Q. Diffusion is______________.

1. all of the above.
2. the movement of molecules that depends on pressure.
3. the movement of molecules from higher concentration to lower concentration.
4. the movement of molecules from lower concentration to higher concentration.