Diffusion

Q.

Which of the following is correct regarding diffusion?

1. Lipids

2. Proteins

3. Cellulose

4. Starch

Q. ___ is the net movement of the molecule from a region of high concentration to a region of low concentration.

Q. Substances like carbon dioxide and oxygen move across the cell membrane by the process of___.

1. Transpiration
2. Diffusion
3. Photosynthesis
4. Respiration

Q. Which of the following always involves the process of diffusion?
A. The gaseous exchange between the closely placed cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.

1. Only A and B
2. Only B and C
3. Only A and C
4. Only C and D

Q. Which among the following is involved in the process of diffusion?

1. Movement of molecules from higher to lower concentration.
2. Movement of molecules from lower to higher concentration.
3. Movement of molecules with the expenditure of energy.
4. Movement of molecules without the expenditure of energy.

Q. Match the following solution types with the effects they have on a cell.

1. Cell shrinks
2. Cell swells
3. No change

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

1. True
2. False

Q. Substances like carbon dioxide and oxygen move across the cell membrane by the process of___.

1. transpiration
2. diffusion
3. photosynthesis
4. respiration

Q. Substances like carbon dioxide and oxygen move across the cell membrane by the process of___.

1. transpiration
2. diffusion
3. photosynthesis
4. respiration

Q.

Question 44
How do substances like carbon dioxide $\left(C{O}_2\right)$ and water $\left(H_{2}O\right)$ move in and out of the cell?