Mitochondria; Cells & Tissues; 9th Biology with Ma'am Shazia

Mitochondria; Structure and function Mitochondria; Cells & Tissues; 9th Biology with Ma’am Shazia
THE PURPOSE OF THIS CHANNEL IS TO FACILITATE THE STUDENTS OF SSC AND HSSC FOR BIOLOGY SYLLABUS(FBISE)
9TH BIOLOGY (SSC-I)
Cells And Tissues (Chapter no 04)
Cell Structure And Function
Cell Organelles:
 Organelles are small structures within cell that perform dedicated (specific) functions
 Many organelles are present in eukaryotic cells.
MITOCHONDRIA
Meaning
A mitochondrion is typically about 0.5um in diameter, the size of some bacteria.
It is from this appearance that the name ‘mitochondrion’ is derived
Greek “mitos” meaning “thread”
“chondrion” meaning “a grain”.
OCCURANCE:
Double membrane bound organelle
Found only in eukaryotes
Structure:
 The outer membrane of mitochondria is smooth
 Inner membrane forms infoldings called cristae
Structure:
 Cristae increase the surface area of inner membrane
 Mitochondria have their DNA and ribosomes
 The ribosomes of mitochondria are more similar to bacterial ribosomes
Function:
 Sites of cellular respiration (Aerobic respiration)
 And are major energy production centers (ATP production site)

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