Question

1) Enumerate functions of plasma membrane?:
2) Write down the difference between diffusion and osmosis.
3) Write short note on mitochondria and plastids?
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Answer 1

Answer:

1) plasma membrane semipermeable in nature allows transportation

it helps in keeping internal cytoplasm separate from surrounding

it helps in maintaing rigidity

2)diffusion in movement of vases in and out of cell according to concentration

osmosis is movement of solvent or water in and out of cell

3) mitochondria is the powerhouse of cell it's plays imp role in respiration

plastids is present in plants it consist of pigments

there of three types where

chloroplast is one of it

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Answer 2

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1) The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

2) The main difference between the two is that diffusion can occur in any mixture, even when two solutions are separated by a semipermeable membrane, whereas osmosis exclusively occurs across a semipermeable membrane. There are actually three types of passive transport processes.

3) Short Note On :

Mitochondria

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

Plastid :

The plastid is a membrane-bound organelle found in the cells of plants, algae, and other eukaryotic organisms. They are considered endosymbiotic Cyanobacteria, related to the Gloeomargarita. Plastids were discovered and named by Ernst Haeckel, but A. F. W. Schimper was the first to provide a clear definition.