What organelles inside the cells have membranes with many convolutions?
The organelles that have membranes with many convolutions are the endoplasmic reticulum, Golgi apparatus, and the mitochondria.
Why do mitochondria have convolutions?
The function of the folds in mitochondria is to increase the surface area. This inner folded part of the mitochondria (the inner membrane) is responsible for cell respiration (the process of breaking down carbohydrates (sugars) to make energy).
What is Plasmamembrane function?
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.
Why is the cell membrane like a gatekeeper?
By acting as a gatekeeper, the plasma membrane protects the cell from its surroundings and keeps important molecules from leaving the cell, so that the correct balance of molecules is maintained.
What is the importance of the enfolding of the mitochondria?
Infolding of the cristae dramatically increases the surface area available for hosting the enzymes responsible for cellular respiration. Mitochondria are similar to plant chloroplasts in that both organelles are able to produce energy and metabolites that are required by the host cell.
Why is the inner membrane so highly folded?
To increase the capacity of the mitochondrion to synthesize ATP, the inner membrane is folded to form cristae. These folds allow a much greater amount of electron transport chain enzymes and ATP synthase to be packed into the mitochondrion.
What is the convolutions of the inner membrane of the mitochondria?
The answer is (D) Cristae.
Why is the inner membrane of mitochondria ruffled?
Why is the inner membrane of mitochondria ruffled? *The inner layer of mitochondria is ruffled because of more surface area.
How does a Plasmalemma define a cell?
What is a plasmalemma? Plasmalemma is a less common term for the cell membrane—the thin layer that encloses a cell's cytoplasm, which is the substance between the membrane and the nucleus. It allows beneficial things to pass through while blocking harmful ones. It is also called the plasma membrane.
Why do proteins not pass through plasma membranes?
Proteins cannot passively diffuse across the cell membrane due to their size and polarity. Thus, a delivery system or technique is always required, similar to nucleic acid transfection.
How is a cell membrane like a security guard?
The cell membrane is like a security guard, because the cell membrane controls what goes in and out of a cell like a security guard controls who goes in and out of the gate. 4. Cell Wall -Supports and protects the cell while still letting materials pass through it.
What is the gatekeeper in a cell?
Membrane proteins, the gatekeepers of cells, have been implicated in neurotransmission, sensing, and transport of nutrients and drugs into and out of cells.
Why do mitochondria need the many folded inner membranes called the cristae?
To increase the capacity of the mitochondrion to synthesize ATP, the inner membrane is folded to form cristae. These folds allow a much greater amount of electron transport chain enzymes and ATP synthase to be packed into the mitochondrion.
What are Oxysomes mention their role?
Oxysomes are the structures which are present on the surface of the folded inner membrane of the mitochondria. They are also called f0-f1 particles or ATP synthase. They play the most important role in the formation of energy for the functioning of the cell. The F1 subunit of the oxysomes is refered as the head.
What is the purpose of the folds of the inner mitochondrial membrane quizlet?
The numerous folds of the inner mitochondrial membrane increase the surface area for additional electron transport chains. Increased surface area also allows more area for protons to accumulate outside the membrane to increase the concentration gradient necessary for chemiosmosis.
What does this highly folded membrane most likely indicate?
Compared with a smooth membrane, a highly folded membrane has a greater surface area that increases the rate of material transport across the membrane and provides more support for membrane-associated processes.
What is the importance of the Infolding of the mitochondria?
Infolding of the cristae dramatically increases the surface area available for hosting the enzymes responsible for cellular respiration. Mitochondria are similar to plant chloroplasts in that both organelles are able to produce energy and metabolites that are required by the host cell.
Why is the inner membrane of mitochondria folded?
To increase the capacity of the mitochondrion to synthesize ATP, the inner membrane is folded to form cristae. These folds allow a much greater amount of electron transport chain enzymes and ATP synthase to be packed into the mitochondrion.
What are the ruffles in the mitochondria called?
These ruffles are called cristae. Mitochondria have their own DNA and manufacture some their own proteins. It is thought that the mitochondrion evolved from symbiotic bacteria that took up residence inside the first eukaryotic cells.
Why are plasma membranes arranged as a bilayer rather than a monolayer?
Hint: The plasma membrane is a bilayer because the phospholipids that create it are amphiphilic (hydrophilic head, hydrophobic tail). If the plasma membrane was a monolayer, the hydrophobic tails of the phospholipids would be in direct contact with the inside of the cell.
What is the structure of plasmalemma?
The structure of plasma membrane is chiefly composed of phospholipid bilayer and proteins. Also, some amount of carbohydrates are present. The composition of both proteins and lipids varies in different cells. Based on the location, the proteins can be peripheral or integral proteins.
What is the reason why the cell membrane is semi permeable?
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.
Why is plasma membrane selectively permeable?
The plasma membrane is called as selectively permeable membrane because it regulates the movement of substances in and out of the cell. It means that the plasma membrane allows some material to pass through it while at the same time it blocks other material from entering through it.
Which organelle can be compared to a security guard?
The cell membrane is like a security guard, because the cell membrane controls what goes in and out of a cell like a security guard controls who goes in and out of the gate.
What is known as the guard of the cell that protects and insulates?
Cell membrane. Supports/protects cell; controls movement of substances into/out of cell; separates cell from its environment.
What protects the cell membrane?
Lipids form the building blocks of cellular membranes with phospholipids being the most abundant type of lipid found in the membrane. Phospholipids are what support the cell membranes unique structure due to their hydrophobic (non-polar) tails and hydrophilic heads (polar).
In what way is the cell membrane like a security guard?
In order to keep each factory in working order the cells needs a security guard to protect the factory. The security guard of a cell is its cell membrane. The cell membrane allows certain items into a cell and blocks others from entering, just like a security guard protects a real factory.
What is the purpose of cristae?
Function. The cristae greatly increase the surface area of the inner membrane on which the above-mentioned reactions may take place. A widely accepted hypothesis for the function of the cristae is that the high surface area allows an increased capacity for ATP generation.
What are cristae and what is its significance?
Cristae is the compartment in the inner mitochondrial membrane that expands the surface area of the inner mitochondrial membrane, enhancing its ability to produce ATP. Cristae are studded with F1 particles or oxysomes. Cristae are invaginations of the inner membrane that perform the chemiosmotic function.
What is the function of Oxysomes present in mitochondria?
The inner membrane of mitochondria has oxysomes. Oxysomes take part in the synthesis of ATP through the process of oxidative phosphorylation. The oxysomes are also known as ATP synthase. The F0 part behaves as proton tunnels.