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What organelle has a double layer of phospholipids that is selectively permeable?
Mitochondria is double membraned!It is known as power house of cell it contain enzymes for production of energy by respiration.
Which organelle makes the phospholipids that compose the cells plasma membrane?
The cellular membrane is the organelle that makes the phospholipids that compose the cells plasma membrane. This is made as a collection of proteins and lipids.
How many membrane layers cover the nucleus?
There isn't a specific number of membranes that a eukaryote has, mainly because it is unknown how many organelles are in a cell and how many cells are in an organism. A eukaryotic cell is surrounded by one plasma membrane, but most organelles within the membrane are also covered with membranes, sometimes two in case of mitochondria or chloroplast.
What role do proteins play in the structure and function of plasma membranes?
Proteins in plasma membranes help maintain the structure and regulate the functions of cells by serving as channels for molecules to enter and exit the cell, as well as facilitating cell signaling and recognition.
How many times does an oxygen molecule cross a plasma membrane when moving from inside an alveolus to the hemoglobin of a red blood cell and what are the plasma membranes?
When an oxygen molecule moves from inside an alveolus to the hemoglobin of a red blood cell, it crosses two plasma membranes. The first is the alveolar epithelium's plasma membrane, separating the alveolus from the capillary, and the second is the red blood cell's plasma membrane, where the oxygen binds to hemoglobin for transport. Plasma membranes are the outer boundary of cells that regulate the passage of substances in and out of the cell.
Are both chloroplasts and mitochondria bounded by two membranes?
Yes. The outer membrane is similar to modern eukaryotic membranes, such as the plasma membranes of animals and plants. The inner membrane is similar to modern prokaryotic membranes, found in bacteria. This difference has been taken as one piece of evidence to support the theory of the endosymbiotic origin of these two organelles, i.e. the idea that each of these organelles formed originally from the engulfing of a prokaryotic cell by a eukaryotic one.
What are the differences between the plasma membrane and other membranes?
plasma membrane and other membranes are the same
Are plasma membranes only found in plant cells?
no animal cells also have plasma membranes
What is a membrand bound organelle?
A membrane-bound organelle is an organelle surrounded by a plasma membrane.
What are eukaroytic cells surrounded by?
cell membranes and plasma membranes
What cells have internal membranes and plasma membranes?
Eukaryotic cells.
How do the plasma membranes of Archaea differ from the plasma membranes of Eukarya?
In eukaryotes there are ester bonds between hydrocarbons.In archea there ether bonds.
Do prokaryotes have a nuclear membrane?
No. Prokaryotic cells do not have nuclear membrane, nor any membrane-bound organelle.
Does plasma membranes have molecules on their surface that identifies them?
No
Do plants cells have plasma membranes?
yes.
Water crosses plasma membranes through specialized channels?
Water crosses plasma membranes through specialized channels called diffusion and concentrated gradient.
Are cellular organelles associated with membranes?
Yes, all organelles within the cell are bound by membranes that are all made up of the same basic structure but have different kinds of proteins within them that allow them to have a distinct cellular function. These membranes are always in exchange with one another as well, things called vesicles will bud off from one membrane and fuse with another to deliver things from one organelle to another. So for example the nucleus is bound by the nuclear membrane and the cell is bound by the plasma membrane. Parts of the plasma membrane can bud off to form a vesicle, basically like a bubble and can travel to the nucleus (or any other organelle) where it will fuse with the nuclear membrane (or the membrane of the particular organelle) and deliver its contents into the interior of the organelle or simply deliver new membrane to that organelle. There is an entire branch of scientific research that is concerned with understanding how this whole process works and how membranes bud and form vesicles and fuse, and what is contained within the different membranes of the different organelles, its called membrane trafficking. Hope that helps!
