ENDOPLASMIC RETICULUM, LYSOSOMES ,

1. FUNDAMENTAL UNIT OF
LIFE – CELL
PART -4
BY: MISS RITIMA

2. ENDOPLASMIC RETICULUM
IT IS THE NETWORK OF MEMBRANE BOUND
TUBES AN SHEETS.
ER IS OF TWO TYPES –
a. ROUGH ENDOPLASMIC RETICULUM (RER)
b. SMOOTH ENDOPLASMIC RETICULUM (SER)
 RER MANUFACTURES PROTEINS AND SER
MANUFCTURES FAT MOLECULES OR LIPIDS.

3. MEMBRANE BIOGENESIS
• THE PROTEINS SYNTHESISED BY THE ROUGH
ENDOPLASMIC RETICULUM AND LIPIDS
SYNSTHESISED BY SMOOTH ENDOPLASMIC
RETICULUM ARE USED IN BUILDING CELL
MEMBRANE . THIS PROCESS IS CALLED
MEMBRANE BIOGENESIS.

4. STRUCTURE OF ENDOPLASMIC
RETICULUM

5. FUNCTIONS OF ENDOPLASMIC
RETICULUM
 IT SERVE AS CHANNEL FOR TRANSPORT OF
MATERIAL.
ACT AS A CYTOPLASMIC FRAMEWORK
PROVIDING A SURFACE FOR SOME
BIOCHEMICAL ACTIVITIES OF CELL.
SER PLAYS CRUCIAL ROLE IN DETOXIFYING
MANY POISONS AND DRUGS.
RER HELPS IN PROTEIN SYNTHESIS.

6. LYSOSOMES
LYSOSOMES ARE MEMBRANE BOUND SACS
FILLED WITH THE DIGESTIVE ENZYMES.
THESE ENZYMES ARE MADE BY RER.
LYSOSOMES FORM WASTE DISPOSAL SYSTEM
IN THE CELL BY DIGESTING FOREIGN
PARTICLES AND WORN OUT CELL
ORGANELLE.
WHEN SOME FOREIGN PARTICLE ENTER CELL
LYSOSOMES ATTACT THEM AND KILL THEM .

7. WHY LYSOSOMES ARE CALLED
SUICIDE BAGS
AS WE KNOW THAT LYSOSOMES CONTAIN
POWERFUL DIGESTIVE ENZYMES WHICH ARE
CAPABLE OF BREAKING DOWN ALL ORGANIC
MATERIAL.
 DURING DISTURBANCE IN CELL’S
METABOLISM , THE LYSOSOMES MAY BURST
AND DIGEST THEIR OWN CELL. THEREFORE
THE LYSOSOMES ARE CALLED SUICIDE BAGS.