0
Why do cancer cells prefer to use glycolysis for energy production instead of oxidative phosphorylation?
Cancer cells prefer to use glycolysis for energy production instead of oxidative phosphorylation because glycolysis is a faster way to generate energy, allowing cancer cells to grow and divide rapidly. Additionally, glycolysis can occur in low-oxygen environments, which are common in tumors.
What else can I help you with?
Photophosphorylation is most similar to?
Photophosphorylation is most similar to oxidative phosphorylation in that it involves the production of ATP through a series of redox reactions that generate a proton gradient across a membrane. However, in photophosphorylation, the energy for driving the process is derived from light instead of the oxidation of organic molecules.
Why would you not expect to find mitochondria in anaerobic organisms?
Mitochondria are organelles responsible for aerobic respiration, which requires oxygen. Anaerobic organisms do not rely on oxygen for their energy production, instead they use fermentation or anaerobic respiration. Therefore, they would not have mitochondria.
What is the difference between photorespiration and respiration?
photorespiration: RuBP accepts oxygen instead of CO2 during photosynthesis because production of oxygen has exceeded production of CO2. respiration: Oxygen is produced in oxidative phosphorylation/chemisosmosis and used to produce water during respiration.
Where are the majority of ATP molecules produced during aerobic respiration?
Glycolysis: There are two important ways a cell can harvest energy from food: fermentation and cellular respiration. Both start with the same first step: the process of glycolysis which is the breakdown or splitting of glucose (6 carbons) into two 3-carbon molecules called pyruvic acid. The energy from other sugars, such as fructose, is also harvested using this process. Glycolysis is probably the oldest known way of producing ATP. There is evidence that the process of glycolysis predates the existence of O2 in the Earth's atmosphere and organelles in cells: * Glycolysis does not need oxygen as part of any of its chemical reactions. It serves as a first step in a variety of both aerobic and anaerobic energy-harvesting reactions. * Glycolysis happens in the cytoplasm of cells, not in some specialized organelle. * Glycolysis is the one metabolic pathway found in all living organisms.
How many ATP molecules does fermentation produce during cellular respiration?
Fermentation does not produce ATP molecules during cellular respiration. Instead, fermentation occurs in the absence of oxygen to regenerate NAD+ for glycolysis to continue. This process does not directly generate ATP.
Photophosphorylation is most similar to?
Photophosphorylation is most similar to oxidative phosphorylation in that it involves the production of ATP through a series of redox reactions that generate a proton gradient across a membrane. However, in photophosphorylation, the energy for driving the process is derived from light instead of the oxidation of organic molecules.
What does glucose oxidation not yield?
oxidation of glucose, is the breakdown of glucose in ATP through four main process 1) glycolysis 2) preparation of pyruvic acid 3) citric acid cycle and 4) oxidative phosphorylation
What is end product of glycolysis in erythrocytes?
The end product of glycolysis in erythrocytes is pyruvate. This is because erythrocytes lack mitochondria, so they are unable to proceed with aerobic metabolism and generate ATP through oxidative phosphorylation. Instead, pyruvate is converted to lactate in order to regenerate NAD+ and allow glycolysis to continue producing ATP in the absence of oxygen.
What happens to the high energy electrons(and hydrogen)held by NADH if there is no O2 present?
In the absence of oxygen, the high-energy electrons carried by NADH cannot be transferred to the electron transport chain for oxidative phosphorylation. Instead, NADH donates its electrons to pyruvate, resulting in the production of lactate in animals (lactic acid fermentation) or ethanol and carbon dioxide in yeast (alcoholic fermentation). This process regenerates NAD+, allowing glycolysis to continue producing ATP anaerobically.
Why would you not expect to find mitochondria in anaerobic organisms?
Mitochondria are organelles responsible for aerobic respiration, which requires oxygen. Anaerobic organisms do not rely on oxygen for their energy production, instead they use fermentation or anaerobic respiration. Therefore, they would not have mitochondria.
Does chemiosmosis expend energy?
No, chemiosmosis does not expend energy. Instead, it utilizes the energy stored in the form of a proton gradient to drive ATP synthesis in processes such as oxidative phosphorylation in mitochondria or photosynthesis in chloroplasts.
What is the difference between photorespiration and respiration?
photorespiration: RuBP accepts oxygen instead of CO2 during photosynthesis because production of oxygen has exceeded production of CO2. respiration: Oxygen is produced in oxidative phosphorylation/chemisosmosis and used to produce water during respiration.
What organism does not carry out glycolysis?
Certain archaea, particularly some species of methanogens, do not carry out glycolysis. Instead, they utilize alternative pathways for energy production, such as the acetyl-CoA pathway or the Wood-Ljungdahl pathway. These pathways allow them to metabolize substrates like carbon dioxide and hydrogen to produce methane, which is a key aspect of their anaerobic lifestyle.
Where are the majority of ATP molecules produced during aerobic respiration?
Glycolysis: There are two important ways a cell can harvest energy from food: fermentation and cellular respiration. Both start with the same first step: the process of glycolysis which is the breakdown or splitting of glucose (6 carbons) into two 3-carbon molecules called pyruvic acid. The energy from other sugars, such as fructose, is also harvested using this process. Glycolysis is probably the oldest known way of producing ATP. There is evidence that the process of glycolysis predates the existence of O2 in the Earth's atmosphere and organelles in cells: * Glycolysis does not need oxygen as part of any of its chemical reactions. It serves as a first step in a variety of both aerobic and anaerobic energy-harvesting reactions. * Glycolysis happens in the cytoplasm of cells, not in some specialized organelle. * Glycolysis is the one metabolic pathway found in all living organisms.
Why isn't ATP made in the ETC?
ATP is not made directly in the Electron Transport Chain (ETC). Instead, the ETC generates a proton gradient across the inner mitochondrial membrane, which drives ATP synthesis through the enzyme ATP synthase in a process called oxidative phosphorylation.
Is electron transport involved in both lactic acid and alcohol fermentation?
No, electron transport is not involved in either lactic acid or alcohol fermentation. Both processes are anaerobic, meaning they occur in the absence of oxygen and do not utilize the electron transport chain. Instead, they rely on substrate-level phosphorylation to generate ATP, using NADH produced during glycolysis to reduce pyruvate into lactic acid or acetaldehyde into ethanol.
Why can all organisms use glycolysis but not all organisms can use the Kreb's cycle and ETC?
All organisms can use glycolysis because it is an anaerobic process that occurs in the cytoplasm and does not require oxygen, allowing it to function in various environments. In contrast, the Krebs cycle and electron transport chain (ETC) are aerobic processes that require oxygen and specific cellular organelles, such as mitochondria, which not all organisms possess. For instance, anaerobic organisms, like some bacteria, lack the necessary structures and enzymes to perform these aerobic pathways, relying instead on glycolysis and fermentation for energy production.
