ATP stores some of the energy from glucose molecules during glycolysis. How is the remaining energy from these glucose molecules released? A. water B. electron transport train C. heat D. carbon dioxide
The remaining energy from glucose molecules is released through the process of electron transport chain (option B).
so the answer is B.?
Yes, the answer is B. Electron transport chain.
The remaining energy from glucose molecules after glycolysis is released through the process of cellular respiration, specifically in the electron transport chain. The correct answer is B. electron transport chain.
To understand this, let's break it down step by step:
1. Glycolysis: The first step in cellular respiration is glycolysis, which occurs in the cytoplasm. During this process, a molecule of glucose is broken down into two molecules of pyruvate, resulting in the production of a small amount of ATP and NADH (a molecule that carries high-energy electrons).
2. Krebs Cycle (Citric Acid Cycle): After glycolysis, the pyruvate molecules are transported into the mitochondria, where they undergo further processing in the Krebs cycle. During this cycle, the pyruvate is completely broken down, releasing carbon dioxide as a byproduct and producing more NADH and ATP.
3. Electron Transport Chain: The NADH and FADH2 (another molecule that carries high-energy electrons) produced in glycolysis and the Krebs cycle are oxidized in the electron transport chain. This process takes place in the inner membrane of the mitochondria. The high-energy electrons carried by NADH and FADH2 are transferred from one molecule to another along the electron transport chain, releasing energy in the process. This energy is used to pump protons (H+) across the inner mitochondrial membrane, creating an electrochemical gradient.
4. ATP Synthesis: As the protons accumulate in the intermembrane space of the mitochondria, they flow back into the matrix through a protein complex called ATP synthase. This flow of protons powers the synthesis of ATP from ADP (adenosine diphosphate) and inorganic phosphate (Pi). This process is known as oxidative phosphorylation, which generates a large amount of ATP. The ATP synthesized during this process represents the major energy output.
Therefore, the remaining energy from glucose molecules after glycolysis is released in the electron transport chain (option B). This process leads to the production of ATP, which is the main source of chemical energy used by cells.