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What does a carrier protein do in the process of transporting molecules across a cell membrane?
A carrier protein helps transport molecules across a cell membrane by binding to specific molecules and changing shape to move them across the membrane.
How does passive transport work in biological systems?
Passive transport in biological systems is a process where molecules move across a cell membrane without the use of energy. This can happen through diffusion, where molecules move from an area of high concentration to low concentration, or through facilitated diffusion, where molecules are helped across the membrane by specific proteins. This process is important for maintaining the balance of molecules inside and outside of cells.
How do carrier proteins facilitate the passive transport of molecules across a membrane?
Carrier proteins facilitate the passive transport of molecules across a membrane by binding to specific molecules on one side of the membrane and changing shape to transport the molecules across to the other side. This process does not require energy and is driven by the concentration gradient of the molecules.
What does facilitated diffusion across a biological membrane require?
Facilitated diffusion across a biological membrane requires specific carrier proteins or channel proteins to help transport molecules across the membrane. These proteins facilitate the movement of molecules down their concentration gradient, from an area of high concentration to an area of low concentration, without the need for energy input.
What is the difference between diffusion and facilitated diffusion in terms of the movement of molecules across a cell membrane?
Diffusion is the movement of molecules across a cell membrane from an area of high concentration to low concentration without the need for a protein. Facilitated diffusion also moves molecules from high to low concentration, but requires a specific protein to help them pass through the membrane.
Which type of lizard can run across water without sinking?
Basalisk
An insect is able to walk across the surface of a pond without sinking because of the?
Insects are able to walk across bodies of water without sinking because of their weight. Insects weigh literally nothing.
Why was Aragorn called Strider?
Because he walked across the land with his long legs, striding along.
How can a water strider effectively walk on water?
A water strider can effectively walk on water due to its long, thin legs and the surface tension of the water. The water strider's legs are covered in tiny hairs that help distribute its weight and prevent it from breaking the water's surface tension. This allows the water strider to stay on top of the water and move quickly across its surface.
What effects result from surface tension of water?
A water strider can walk across the surface of a small pond.
Why can you pour a glass of water to the rim of the glass?
it's called "surface tension". It is the property of the surface of a liquid which causes it to behave like an elastic sheet. This is why a "water strider" insect can skate across the surface of a pond without sinking into the water. It is also what causes a drop of water - the surface tension of the water pulls it into a ball.
A dog trotted all the way across a lake without sinking in the water how come?
The lake was frozen, so the dog was crossing solid ice
Why does an Arctic fox have big feet?
The big feet act as 'snow shoes' that can allow an arctic fox to walk across deep snow without sinking in or thin ice without breaking.
Why is an insect able to walk across the surface of a pond without sinking?
Insects that have the ability to walk on water have feet that are spread very far apart. This allows their weight to be distributed over a larger area and stops them from breaking the surface tension of water molecules sticking together.
What molecules move across during osmosis?
Water molecules are the primary molecules that move across during osmosis. Osmosis is the movement of water molecules from an area of higher concentration to an area of lower concentration across a selectively permeable membrane.
What does a carrier protein do in the process of transporting molecules across a cell membrane?
A carrier protein helps transport molecules across a cell membrane by binding to specific molecules and changing shape to move them across the membrane.
What kinds of molecules freely diffuse across a semipermeable membrane?
Water molecules freely diffuse across a semipermeable membrane.
