Answer:
sodium ions diffuse through leakage channels into the cell, but potassium ions diffuse through leakage channels out of the cell
Explanation:
Answer:
Exist in fixed amounts
Cannot be replaced in a short time
Are used faster than they are replaced
Explanation:
Non renewable resources, as the name suggests, cannot be renewed. They are finite resources, meaning they run out. They exist in fixed amounts, which means they are limited. These types of resources can be replaced but it takes a long time. For examples, crude oil. Crude oil is produced by the natural geological occurences but it takes millions to billions of years to be produced. So eventually, we are going to run out of it because people use it up in a significantly lesser time.
Answer:
The reaction is at equilibrium
Explanation:
The Krebs cycle is an aerobic pathway because the final electron acceptor required is oxygen.
The most common situation leading to a disruption in the function of Krebs cycle is the lack of oxygen to accept electrons in the electron transport chain.
The conversion of citrate to isocitrate (isomerization), is catalyzed by the enzyme, aconitase (also known as aconitate hydratase). The hydroxyl (alcohol) group of citrate is moved to an adjacent carbon so that it can be oxidized to form a keto group.
This reaction involves generation of an enzyme-bound intermediate, cisaconitate. At equilibrium, there exists 90% citrate, 3% cisaconitate, and 7% isocitrate; hence the equilibrium of aconitase lies toward citrate formation.
Although the aconitase reaction does not require cofactors, it requires ferrous (Fe2+) iron in its catalytic mechanism. This Fe2+ is involved in an iron–sulfur center, which is an essential component in the hydratase activity of aconitase.
According to Gibb's free energy:
ΔG = 0 - Reaction at equilibrium.
ΔG > 0 - non-spontaneous reaction.
ΔG < 0 - spontaneous reaction.
