Diffusion and Osmosis
The oxidized form of the most common electron carrier needed in both glycolysis and the Krebs cycle is NAD+ (nicotinamide adenine dinucleotide). NAD+ accepts electrons during the oxidation of substrates and is converted to its reduced form, NADH, which then delivers the electrons to the electron transport chain for ATP production.
Most common oxidation state of Gold is 0, because its most common form is its elementary form.
Iron is the most common element that erodes to form rust, which is composed of iron oxide. When iron comes into contact with water and oxygen, a chemical reaction occurs that causes the iron to corrode and form rust.
The structure most likely referred to in the statement is the cell membrane. Active transport mechanisms in cells, like the sodium-potassium pump, are responsible for transporting ions such as sodium against their concentration gradient to maintain proper cellular function. Oxygen diffusing into the cell would typically occur through passive transport mechanisms like simple diffusion across the cell membrane.
The most common charge of sulfur is -2, as it typically gains two electrons to achieve a stable electron configuration similar to a noble gas. This allows sulfur to form compounds with metals, creating sulfides.
Carbon dioxide transport is passive because it moves across cell membranes by simple diffusion, down its concentration gradient. However, in the blood, most carbon dioxide is carried in the form of bicarbonate ions, which is facilitated by specific enzymes and transport proteins.
It is a type of passive diffusion, as the water travels along a concentration gradiant. As opposed to active transport, where the substances can pass against a concentration gradiant.
Rail transportation is the most common form of LONG DISTANCE transport in China.
it depends most of the time YES
Active transport requires energy input to move substances across a membrane against their concentration gradient, while passive transport does not require energy as it moves substances along their concentration gradient. Active transport is selective and requires specific transport proteins, while passive transport occurs through simple diffusion or facilitated diffusion.
the most popular transport for the tourists is air transport
Osmosis is the diffusion of water trough a selectively permeable membrane. However, water passes quite easily across most membranes. So it's mostly known as passive transport
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The most basic difference between active and passive transport is that active requires energy while passive does not. You would require active transport if the substance is going against the concentration of molecules inside and outside of the membrane or if the substance is particularly large. Passive is more for smaller molecules that go with the concentration of the molecules inside and outside of the membrane.
There are multiple ways for cells to transport things across a difference in concentration. The most common process is diffusion, which is the movement from high concentration to low. Osmosis is the most popular example of this. Facilitated Diffusion is basically diffusion with the use of proteins that are specified for certain molecules. Active Transport is the method by which molecules are transported from low concentration to high concentration.
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