The electrons from from NADH and FADH2 flow through the electron transport chain in the inner mitochondrial membrane generating a H+ buildup in the inner membrane space. This proton gradient (gradient of H+) flowing through the membrane enzyme complex ATP synthetase is the direct energy source for producing ATP.
What is the direct energy source that drives ATP synthesis during respiratory oxidative?
The direct energy source that drives ATP synthesis during respiratory oxidative phosphorylation is oxidation of glucose to CO2 and water. the thermodynamically favorable flow of electrons from NADH to the mitochondrial electron transport carriers.
What energy drives ATP synthesis?
In general, the main energy source for cellular metabolism is glucose, which is catabolized in the three subsequent processes—glycolysis, tricarboxylic acid cycle (TCA or Krebs cycle), and finally oxidative phosphorylation—to produce ATP.
What is the direct source of the energy for ATP synthesis in photosynthesis?
The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
Where does the energy that drives ATP synthesis come from?
Where does the energy that drives ATP synthesis come from? The proton gradient. All of the following are in the mitochondria EXCEPT: pentose phosphate pathway.
What is the immediate source of the energy used to synthesize ATP?
The energy for the synthesis of ATP comes from the breakdown of foods and phosphocreatine (PC). Phosphocreatine is also known as creatine phosphate and like existing ATP; it is stored inside muscle cells. Because it is stored in muscle cells phosphocreatine is readily available to produce ATP quickly.
What are the three steps of respiration except?
The reactions of cellular respiration can be grouped into three stages: glycolysis, the Krebs cycle (also called the citric acid cycle), and electron transport.
What process produces ATP?
The process human cells use to generate ATP is called cellular respiration. It results in the creation of 36 to 38 ATP per molecule of glucose. … The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration (the oxygen-requiring part).
Where is energy stored in ATP?
Energy is stored in the bonds joining the phosphate groups (yellow). The covalent bond holding the third phosphate group carries about 7,300 calories of energy. Food molecules are the $1,000 dollar bills of energy storage.
What is the process of ATP synthesis?
ATP synthesis involves the transfer of electrons from the intermembrane space, through the inner membrane, back to the matrix. … The combination of the two components provides sufficient energy for ATP to be made by the multienzyme Complex V of the mitochondrion, more generally known as ATP synthase.
What are the roles of ATP and NADPH in photosynthesis?
These electrons are used to produce NADPH as well as ATP in a series of reactions called the light reactions because they require light. NADPH and ATP formed by the action of light then reduce carbon dioxide and convert it into 3-phosphoglycerate by a series of reactions called the Calvin cycle or the dark reactions.
What is the role of ATP synthase in photosynthesis?
The role of ATP synthase in photosynthesis is to transports a proton down the gradient and uses the energy to complete the phosphorylation of ADP to ATP. Further Explanation: Photosynthesis starts with the absorption of light or solar energy by the plant pigments called chlorophyll.
What drives the formation of ATP by ATP synthase quizlet?
gradient provides energy for production of ATP by ATP synthase.