Which of the following results one hour after membrane fusion best supports the alternative hypothesis that the cell membrane is a fluid mosaic?
Which of the following results, one hour after membrane fusion, best supports the alternative hypothesis that the cell membrane is a fluid mosaic? The membrane proteins from each cell have mixed and drifted within the bilayer, which supports the fluid mosaic model of cell membranes.
Which cellular component will be found in the widest range of organisms in the sample?
ribosome
Which of the following indicates where testosterone enters a cell and why it is able to cross at that point?
Which of the following indicates where testosterone enters a cell and why it is able to cross at that point? because testosterone is nonpolar and can diffuse through the membrane. Therefore, testosterone can cross the hydrophobic inner region of the phospholipid bilayer.
Which of the following changes will most likely result from a depletion of available ATP stores inside the cell?
Based on the model presented in figure 1, which of the following changes will most likely result from a depletion of available ATP stores inside the cell? The Na+ concentration inside the cell will increase.
Which investigation will help determine whether the new membrane protein?
which investigation will help determine whether the new membrane protein is a channel protein involved in membrane transport? add more of the proteins to the plasma membrane and measure the rate of the particle movement.
Does facilitated diffusion require ATP?
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
How Does facilitated diffusion use ATP?
Facilitated diffusion doesn’t require ATP because it is the passive movement of molecules such as glucose and amino acid across the cell membrane. It does so with the aid of a membrane protein since the glucose is a very big molecule. Examples of membrane proteins include channel proteins and carrier proteins.
What process does not require ATP?
Secondary active transport , created by primary active transport, is the transport of a solute in the direction of its electrochemical gradient and does not directly require ATP.
What is facilitated diffusion example?
The transport of glucose and amino acid from the bloodstream into the cell is an example of facilitated diffusion. In the small intestine, these molecules are taken in via active transport and then are released into the bloodstream.
Where is facilitated diffusion used?
Examples of biological processes that entail facilitated diffusion are glucose and amino acid transport, gas transport, and ion transport. Facilitated diffusion is important because it regulates what goes in and what goes out of the cell.
What is facilitated diffusion and its types?
“Facilitated diffusion is a type of diffusion in which the molecules move from the region of higher concentration to the region of lower concentration assisted by a carrier.”
What is simple and facilitated diffusion?
Simple diffusion permits the passage of only small and nonpolar molecules across the plasma membrane. Facilitated diffusion permits the passage of large and polar molecules across the plasma membrane.
What are two types of facilitated diffusion?
Facilitated diffusion is performed by various types of proteins that are embedded within the cell membrane. While there are hundreds of different proteins throughout the cell, only two types are found associated with facilitated diffusion: channel proteins and carrier proteins.
What are the similarities and differences between simple diffusion and facilitated diffusion?
In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.
What is similar between simple and facilitated diffusion?
They share some common characteristics which include the fact that both simple and facilitated diffusion are passive processes and therefore require no energy to take place as movement takes place down the concentration gradient of the molecules – this means that some molecules will be able to diffuse into the cell.
What is the major difference between diffusion and facilitated diffusion?
Complete answer:
| Characteristics | Simple Diffusion | Facilitated Diffusion |
|---|---|---|
| Size of molecules | Simple diffusion is involved in the passage of small molecules along with non-polar molecules. | Facilitated diffusion is commonly involved in the movement of large as well as polar molecules across a biological membrane. |
What is the major difference between facilitated diffusion and passive diffusion Mcq?
6. What is the major difference between Facilitated diffusion and Passive diffusion? Explanation: Facilitated diffusion is a carrier-mediated transport which operates down the concentration gradient. It is faster than passive diffusion because of the involvement of Carriers.
What is the difference between passive and facilitated diffusion?
The simplest forms of transport across a membrane are passive. In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.
Why is facilitated diffusion a passive process?
Facilitated diffusion is a type of passive transport. Even though facilitated diffusion involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient. Small nonpolar molecules can easily diffuse across the cell membrane.
What are 2 examples of passive transport?
Examples of Passive Transport
- simple diffusion.
- facilitated diffusion.
- filtration.
- osmosis.
What is a real life example of passive transport?
An example of passive transport is diffusion, the movement of molecules from an area of high concentration to an area of low concentration. Carrier proteins and channel proteins are involved in facilitated diffusion.
What are two examples of active and passive transport?
Examples of active transport include sodium-potassium pump, uptake of mineral ions by the roots of the plants, etc. Whereas, the examples of passive transport include the exchange of gases in the alveoli of the lungs and the exchange of nutrients in the kidneys.
What is the difference between active and passive transport?
In Active transport the molecules are moved across the cell membrane, pumping the molecules against the concentration gradient using ATP (energy). In Passive transport, the molecules are moved within and across the cell membrane and thus transporting it through the concentration gradient, without using ATP (energy).
What is required for active transport?
During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.