Single Membrane / Double membrane /no membrane?

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In summary, the nucleus, nuclear envelope, chloroplasts, and mitochondria all have a double membrane, while the nucleolus, chromatin, smooth/rough endoplasmic reticulum, Golgi body, central vacuole, lysosomes, ribosomes, cilia, and flagella have no membrane. The peroxisome is bound by a single membrane.
  • #1
gracy
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Nucleus - Double membrane
Nucleolus- no membrane
Chromatin- no membrane
Nuclear Envelope - Double membrane
Smooth/Rough Endoplasmic Reticulum -single Membrane
Golgi Body- single Membrane
Central Vacuole- single Membrane
Lysosomes - single Membrane
Chloroplasts - Double membrane
Mitochondria - Double membrane
Ribosomes -no membrane
Cilia-No membrane
Flagellum- No membrane
Am I right?
 
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  • #2
Looks good to me, though I'm not sure about cilia and flagella. Both are not separated from the cytoplasm by a membrane, but they are structures on the plasma membrane, which is a single membrane.
 
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  • #3
CIlia/ flagella are encased by the cell membrane (lipid bilayer).
 
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  • #4
And peroxisome is bound by single membrane,right?
 
  • #6
Ygggdrasil said:
Here's a helpful reference
Indeed !
 

1. What is a single membrane?

A single membrane is a type of cellular membrane that consists of a single layer of phospholipids, with proteins embedded within it. This type of membrane is found in prokaryotic cells, such as bacteria, and some organelles in eukaryotic cells, such as mitochondria and chloroplasts.

2. What is a double membrane?

A double membrane is a type of cellular membrane that consists of two layers of phospholipids, with proteins embedded within them. This type of membrane is found in most eukaryotic cells, and is typically seen in organelles such as the nucleus, endoplasmic reticulum, and Golgi apparatus.

3. What is the function of a membrane?

The main function of a membrane is to act as a barrier that separates the inside of a cell from its external environment. It also regulates the movement of substances in and out of the cell, and plays a role in cell signaling and communication.

4. How is a membrane different from a cell wall?

A membrane is a flexible, selectively permeable barrier that surrounds the cell, while a cell wall is a rigid structure that provides support and protection to the cell. Cell walls are only found in plant, fungal, and bacterial cells, while membranes are found in all types of cells.

5. Can a cell survive without a membrane?

No, a cell cannot survive without a membrane. The membrane is essential for maintaining the integrity of the cell and regulating the movement of substances in and out of the cell. Without a membrane, the cell would be vulnerable to damage and would not be able to maintain a stable internal environment.

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