Why does aerobic respiration release more energy GCSE?

Aerobic respiration releases a lot more energy in cells when food is broken down in the presence of oxygen. Carbon dioxide and water are also produced during the process of aerobic respiration.

Why does aerobic respiration produce less energy than aerobic respiration?

In aerobic respiration, 36 molecules of ATP are formed. In this process only 02 ATP molecules are produced by each glucose molecule and the glucose molecules are partially broken down. The reaction yields less energy as compared to the aerobic respiration because the end product is alcohol and not carbon dioxide.

Why does aerobic respiration produce more energy than fermentation?

Overview. Aerobic respiration refers to the metabolic pathways by which organisms break down glucose to produce ATP. Fermentation produces relatively less energy than respiration, because fermentation does not result in the complete oxidation of glucose.

Does aerobic or anaerobic respiration produce more energy?

Aerobic respiration is far more energy-efficient than anaerobic respiration. Aerobic processes produce up to 38 ATP per glucose. Anaerobic processes yield only 2 ATP per glucose.

Why does aerobic respiration produce more ATP than anaerobic respiration?

Aerobic respiration produces more ATP than anaerobic respiration due to the complete oxidation of glucose to CO2 and water. O2 acts as the terminal electron acceptor in the electron transport chain and gets reduced to water. Most of the ATPs are produced by oxidative phosphorylation in the electron transport chain.

Why less energy is produced during anaerobic respiration?

Anaerobic respiration in muscles Glucose is not completely broken down, so much less energy is released than during aerobic respiration. There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later.

Why does anaerobic respiration make less ATP than aerobic respiration?

Anaerobic respiration occurs only in the cytoplasm of cells. Glucose is not completely broken down, so much less ATP is released than during aerobic respiration. The lactic acid that builds up needs to be oxidised to carbon dioxide and water.

Why does anaerobic respiration produce less energy?

Much less energy is released during anaerobic respiration than during aerobic respiration. This is because the breakdown of glucose is incomplete. Anaerobic respirationproduces an oxygen debt. This is the amount of oxygen needed to oxidise lactic acid to carbon dioxide and water.

Why does anaerobic produce less ATP than aerobic?

With oxygen, organisms can break down glucose all the way to carbon dioxide. This releases enough energy to produce up to 38 ATP molecules. Thus, aerobic respiration releases much more energy than anaerobic respiration. Similarly, you may ask, why does aerobic respiration produce more ATP than fermentation?

Why is fermentation less efficient than aerobic respiration?

Fermentation is less efficient at using the energy from glucose: only 2 ATP are produced per glucose, compared to the 38 ATP per glucose nominally produced by aerobic respiration. This is because the waste products of fermentation still contain chemical potential energy that can be released by oxidation.

Why is oxygen the preferred electron acceptor in aerobic respiration?

Fundamentally, it’s because oxygen is the best electron acceptor around. While aerobic respiration uses oxygen as the terminal electron acceptor, anaerobic respirers use a variety of other terminal electron acceptors, all of which are worse than oxygen.

What are the end products of aerobic and anaerobic respiration?

The end products of aerobic respiration are H2O and CO2 which are the lowest energy compounds in common metabolism. The end products of anaerobic respiration are either pyruvate or lactate – compounds that still contain a lot of energy which can be released when aerobically broken down to CO2 and H2O.