Question

State the major functions of the following :
(a) Plasma membrane
(b) Ribosome
(c) Lysosome
(d) Mitochondria
(e) Golgi apparatus
(f) Cytoplasm
(g) Asters of centrosome
(h) Chromosomes
(i) Glycogen granule
(j) Vacuoles

Answer 1

The functions of the given are :

a) PlASMA MEMBRANE or Cell membrane

¤ It separates content of cell from its surroundings...

¤ It regulates the entry of certain solids and ions into the cell.

¤ It maintains the shape of the cell that is the animal cell.

b) RIBOSOME :

¤ Its main function is only Protein synthesis...



c)LYSOSOMES:

¤ Intracellular digestion..

¤ Destroy foreign substances ...

¤ When a cell is old or injured this rapidly destroy organelles hence called suicide bags.


d)GOLGI APPARATUS :

¤ Synthesis and secretion of enzymes , hormones and etc..

¤ The formation of acrosome of sperm..


e)MITOCHONDRIA :

¤ Release of energy from pyruvic acid produced in cytoplasm in the form of ATP .

¤ Synthesis of respiratory enzymes


f)CYTOPLASM :

¤ Different organelles is contained in it to perform different functions..

¤ All metabolic activities occurs in it ..

¤ it provides a medium of earlier steps of respiration

g) ASTERS OF CENTROSOME :

¤ Present in animal cell only and helps during the process of mitosis.

h)CHROMOSOME :

¤ Chromosomes carry hereditary information or the genes..

i)GLYCOGEN GRANULES :

¤ Starch glycogen and fat containing granules serve as food for the cell..

¤ They are the small particles or crystals or droplets in a plant cell..


j) VACUOLES :

¤ Storage of water and other substances, food pigments and waste products ..

¤ Gives turgidity to the plant cell by pressing against the cell wall.