Which of the following affects the rate of diffusion?
Concentration gradient
Permeability of the membrane
Temperature and pressure
All of the above
Related Questions
When a molecule moves across a membrane independent of other molecules, the process is called
Uniport
Symport
Antiport
Facilitated diffusion
Read carefully the following statements and choose the right answer from the options given below
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances
I and III
I and II
III and IV
I, II, III and IV
The diffusion of water across a selectively permeable membrane is called:
Active transport
Facilitated diffusion
Osmosis
Plasmolysis
Which of the following statements are true/false?
I. The positive hydrostatic pressure is called turgor pressure.
II. Wall pressure exerts to prevent the increase of protoplasm size.
III. Diffusion is more rapid in liquids than in gases.
IV. Diffusion of water through a semi-permeable membrane is called imbibition.
V. Osmosis is movement of substance, which takes place along a diffusion gradient
I and II are true, while III, IV and V are false
I and III are true, while II, IV and V are false
I and IV are true, while II, III and V are false
I and IV are true, while II, III and IV are false
Root hair absorb water from the soil on account of
Turgor pressure
Osmotic pressure
Suction pressure
Root pressure
Following statements are related with the diffusion of coloured molecules across a membrane. Select the correct statement, which shows the fastest rate of diffusion?
An internal concentration of 15% and external concentration of 10%
An internal concentration of 25% and external concentration of 50%
An internal concentration of 50% and external concentration of 25%
Both (2) and (3) shows fastest rate of diffusion
Movement of molecules in three forms of matter, from a region higher concentration to a region of lower concentration can be termed as
Osmosis
Passive transport
Diffusion
Active transport
Diffusion, a process occur(s) along the concentration gradient is actively involved in
Transpiration
Respiration
Photosynthesis
All of these
Which of the following statements are true/false?
I. The positive hydrostatic pressure is called turgor pressure.
II. Wall pressure exerts to prevent the increase of protoplasm size.
III. Diffusion is more rapid in liquids than in gases.
IV. Diffusion of water through a semi-permeable membrane is called imbibition.
V. Osmosis is movement of substance, which takes place along a diffusion gradient
I and II are true, while III, IV and V are false
I and III are true, while II, IV and V are false
I and IV are true, while II, III and V are false
I and IV are true, while II, III and IV are false
Movement of molecules takes place along the concentration gradient in
Simple diffusion
Facilitated diffusion
Active transport
Both 1 and 2
