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Organelles exist so the cell can accommodate many different reactions simultaneously through compartmentalization. Some reactions or processes would be harmful to the cell if it were to exist outside of a membrane-bound organelle. For example, lysosomes contain hydrolytic enzymes that are used for digestion when it fuses with a food vacuole. These enzymes couldn't exist freely without cellular damage. Peroxisomes work similarly and can isolate one of its byproducts, hydrogen peroxide, which could be harmful to the cell.
Another main purpose of organelles is increased surface area. In Biology, every reaction depends on speed, and evolution has driven mechanisms that increase surface area. Many organelles are convoluted or twisted to give more space for reaction. The rough endoplasmic reticulum is highly folded with cisternae for ribosomes. The mitochondria has a folded inner membrane that increases the rate of respiration. Through increased surface area and compartmentalization, organelles give rise to complicated eukaryotic organisms.
What else can I help you with?
How do you use the word 'organelles' in a sentence?
Living cells contain numerous organelles, each with a unique purpose and function.
What is the purpose of chloroplast in eukaryotic cells?
There is a single purpose. It is doing photosynthesis.
Where are organelles in cells?
Organelles are found in the cytoplasm of cells.
Which kind of cells have organelles?
Eukaryotic cells have organelles.
What are animals that use organelles called?
Animal cells use organelles (so do plant cells). Cells with organelles are called "eukaryotic" which means these are cells that have a nucleus (which is one of the organelles).
Where are organelles found in cells?
Organelles are found in the cytoplasm of cells.
Plant cells and animal cells contain organelles?
yes animal cells and plant cells do have organelles
Do bacteria have organelles within their cells?
Yes, bacteria do not have organelles within their cells. They are prokaryotic cells, which means they lack membrane-bound organelles found in eukaryotic cells.
Do bacteria cells have membrane-bound organelles?
No, bacteria cells do not have membrane-bound organelles.
What does not have a organelles?
Organelles are in every cell. Virus do not have organelles.
What are the 7 organelles in plant cells?
what are the 7 organelles
Which best describes a difference between prokaryotic cells and eukaryotic cells?
Eukaryotic cells contain organelles that are enclosed in membranes
