The Fundamental Unit of Life Blog 5

CLASS 9 CHAPTER 5 
THE FUNDAMENTAL UNIT OF LIFE
Day 5
" Whenever you feel sad, just remember that there are trillions of cells in your body & all they care about is you!!"
Dear Students, 
Welcome Back!😊

I hope you have completed your yesterday's assignment.

 After this class, you will be able to:
  • Explain the structure and function of Golgi Apparatus, Lysosomes, Mitochondria.
Note: Content written in blue should be recorded as notes in the Biology Notebook.
Happy Learning!😊

Golgi Apparatus
(Not to be drawn in bio notebook)
Structure:

  • first described by Camillo Golgi, consists of membrane-bound vesicles (flattened sacs), arranged parallel to each other in stacks called Cisterns.
  • these membranes have connections with membranes of ER & thus forms a complex cellular membrane system.

Functions:

  • Materials synthesized near the ER are packaged and dispatched to various targets in and out of the cell through the Golgi Apparatus.
  • storage, modification, and packaging of products in vesicles.
  • formation of complex sugars from simple sugars.
  • formation of Lysosomes.
https://youtu.be/aT7gBNAWopo?t=11 ( Check this video on Golgi apparatus)

Lysosomes

(Not to be drawn in bio notebook)
Structure:
  • are membrane-bound sacs filled with digestive enzymes.
  • these enzymes are made by RER.
Functions:
  • they are a kind of waste disposal system of a cell.
  • it helps to keep the cell clean by digesting any foreign material like food, bacteria, etc. and worn-out cell organelles by breaking them into small pieces, with the help of a powerful digestive enzyme.
  •  During disturbance in cellular metabolism, when a cell gets damaged, lysosomes may burst and the enzyme can digest their own cell. Thus, they are also regarded as 'suicidal bags' of the cell.
https://youtu.be/cA-Ou_t2sag ( Check this video on Lysosomes)


Mitochondria
(Not to be drawn in bio notebook)
Structure:
  • It has two membrane coverings- The outer membrane is highly porous and the inner membrane is deeply folded. 
  • The folds create a large surface area for ATP (Adenosine Triphosphate, also called the energy currency of the cell) generating chemical reactions.
  • Mitochondria has its own DNA and ribosomes. Thus, they are able to make some of their own proteins.
Functions:
  • It is regarded as the powerhouse of the cell.
  • The energy required for various chemical activities needed for life is released by mitochondria in the form of ATP.
https://youtu.be/mxbodI60OT4?t=10 ( Check this video on Mitochondria)

Assignment

  • Read Pg. 64 & 65 of the textbook.
  • Answer IQ on Pg. 65.
I hope it helped!
See you for the Next Class!
Take care.😊😊😊

Comments

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