Challenge to all stars and mods
1. Name all the double membrane bound cell organelles.
2. Name the organelles that contain its own DNA and ribosomes.
3. Define centriole in simple terms.
All the Best
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Answers
❥Question 1 :-
Name all the double membrane bound cell organelles.
❥ Answer :-
There are many cell organelles which are membrane-bound, The two organelles which have double membrane are the mitochondria and choloroplast.
❥ Additional Information :-
Mitochondria, Chloroplasts, Endoplasmic Reticulum, Golgi Body, and Nucleus are Double Membrane bound Organelles
Mitochondria
Are sausage or cylindrical-shaped organelles found in cytoplasm
Are the sites of aerobic respiration (complete breakdown of glucose to release energy)
Number and size varies.
Has 2 membranes; outer membrane and inner membrane
Inner membrane forms a number of infoldings called the cristae
Cristae contains many enzymes required for forming ATP (storage form of energy inside a cell)
Fluid-filled space inside the mitochondria is called the matrix
Matrix contains a circular DNA, few RNA molecules and ribosomes (70S).
Are also called the powerhouses of the cell (because they generate energy required for the cell and store it in the form of ATP)
Are semi-autonomous (They have their own DNA and replicate on their own and can also synthesize most of its proteins)
Chloroplast
They are mainly present in the in leaf epidermal cells.
They are cylindrical-shaped organelles
They are the sites of photosynthesis
They have 2 membranes; outer and inner membrane
The fluid-filled internal space is called the stroma
The stroma contains thylakoids which contain the pigments chlorophyll and carotenoids.
The stroma also contains a circular DNA, few RNA molecules and ribosomes (70S).
❥Question 2 :-
Name the organelles that contain its own DNA and ribosomes.
❥ Answer :-
The cell organelles that posses their own DNA are Chloroplasts and Mitochondria.
Due , to presence of Own DNA and ribosomes,they can self replicate and translate proteins.
Hence, They are called as Semi Autonomous organelles.
❥ Additional Information :-
Chloroplast is the cell organelle that performs Photosynthesis.
Mitochondria is the cell organelle that performs cellular respiration.
It is called as Powerhouse of the cell.
❥Question 3 :-
Define centriole in simple terms.
❥ Answer :-
The centriole is a cytoplasmic structure in most eukaryote cells. It is involved in cell division and in the formation of cilia and flagella. The main function of centrioles is to produce cilia during interphase and the aster and the spindle during cell division.