What provides the energy necessary for the water cycle to occur?
The continuous movement of water.
It cannot occur in the dark. It contains an enzyme called rubisco which is a light-activated enzyme. Also the Calvin cycle uses the chemical energy produced in the light reactions, and the light reactions need sunlight energy in order to produce the energy needed in the Calvin cycle. Hope that helps :)
Why does the calvin cycle work during night and day but light reactions can only occur during daylight hours?
The changes that occur are categorized by how oxygen is available for burning the fuel called ATP, and the terms are aerobic and anaerobic. Aerobic uses what is called the Krebbs, or citric cycle, to produce energy in the form of ATP. Anaerobic follows a lactic acid cycle that still produces ATP for energy but at a much lower rate.
I believe you are referring to the Kreb's cycle in mitochondria. The Krebs cycle is vital in all living cells as a part of cellular respiration. It converts 2 pyruvate molecules (from one glucose from glycolysis), to produce 6 molecules of carbon dioxide, 2 ATP (energy for the cell to use), 2 FADH molecules, and 8 NADH molecules. The pyruvate can easily pass through the mitochondria walls, with the rest of the cycle progressing inside…
For active transport to occur, energy is needed in the form of ATP. During respiration energy is released in the form of ATP The reason why energy (ATP) is needed with active transport is because active transport is movement of molecules from a low concentration to a high concentration so its going against the concentration gradient. As its going against the concentration, energy (in the form of ATP) is necessary or else this process will…