Significance of Cell Membrane
Significance of Cell Membrane
Significance of Cell Membrane
· The net movement of substances is from high concentration to lower concentration. There is no expenditure of cellular energy.
Cell membrane is selectively permeable and flexible. This is because it is made up of organic molecules called lipids and proteins. The transport of some substances is against the concentration gradient. This requires cellular energy. Organic molecules like glucose and inorganic ions like sodium and potassium are transported in this way.
Which of the following are correct : (a) Cell membrane is selectively permeable and flexible. (b) Cell membrane is made up of organic molecules called lipids and proteins. (c) Cell membrane is made up of organic molecules called calcium carbonate. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) The net movement of substances is from high concentration to lower concentration. (b) Cell membrane is selectively permeable and flexible. (c) When substances are moved from high concentration to low concentration, than there is no expenditure of cellular energy. | |||
| Right Option : D | |||
| View Explanation | |||
The net movement of the substances from higher to lower concentration is called as ______________________. | |||
| Right Option : A | |||
| View Explanation | |||
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