It is deep down in the mud sediments, and some of the parts in the bottom have been oxygen-free for more than 50,000 years. It can be aerobic, where oxygen is present, or anaerobic, where oxygen is absent, and a sugar such as glucose is required to fuel the process. Aerobic cellular respiration typically occurs in eukaryotic cells, the cells which are found in plants and animals. Although carbohydrates, fats, and proteins can all be processed and consumed as reactant, it is the preferred method of pyruvate breakdown from glycolysis and requires that pyruvate enter the mitochondrion in order to be fully oxidized by the Krebs cycle. This type of respiration occurs in three steps: glycolysis; the Krebs cycle; and electron transport phosphorylation. Cellular respiration is the process in which food molecules are used to produce cell energy. When glycolysis takes place, the result is pyruvate. Anaerobic respiration is similar to aerobic respiration, except, the process happens without the presence of oxygen. Aerobic cellular respiration is the process by which cells use oxygen to help them convert glucose into energy. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.In glycolysis, glucose is split into two molecules of pyruvate.This results in a net gain of two ATP molecules. This means NO oxygen is needed. In order for it to be aerobic, pyruvate must be oxidized in the mitochondria via the citric acid cycle. But, guess the loriciferans like the mud, and do not care about oxygen at all. + → + + Cellular Respiration Cellular respiration is a process that is usually AEROBIC. This step is actually anaerobic as it does not require oxygen. This is because the other stages need oxygen, whereas glycolysis does not, and there was no oxygen in Earth’s atmosphere when life first evolved about 3.5 to 4 billion years ago. The term 'aerobic' means "air needing". Aerobic Vs. Anaerobic Respiration. A. Aerobic respiration requires oxygen to proceed, but anaerobic respiration does not. There are some steps to the process that are ANAEROBIC. Cellular respiration that proceeds without oxygen is called anaerobic respiration . Aerobic respiration, as the name suggests, is the process of producing the energy required by cells using oxygen. Important Aerobic Respiration Steps Glycolysis. Aerobic respiration requires oxygen in order to generate energy (ATP). Glycolysis is the first step in aerobic respiration. The major role of oxygen in aerobic respiration is to synthesize the energy currency of the cell ATP by accepting electrons generated from the breakdown of the macromolecules present in the food. This means the reaction REQUIRES oxygen. Unlike aerobic respiration, anaerobic respiration does not need oxygen. Oxygen is not needed for glycolysis but is required for … The by-product of this process produces carbon dioxide along with ATP – the energy currency of the cells. It is the release of a relatively small amount of energy in cells by the breakdown of food substances in the absence of oxygen. Anaerobic organisms do not need oxygen. Explanation; -Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy.-Anaerobic respiration occurs when oxygen is not present. Each and every cell in the body, is able to carry out glycolysis in the cytosol (cell fluid of cytoplasm). Life first evolved in the absence of oxygen, and glycolysis does not require oxygen. It can also be said that oxygen is essential for the breakdown of … ... animals, and humans, but this 1 mm amoeba does not need oxygen to survive. So it is … The reason is because oxygen is required to produce ATP. Glucose + Oxygen → Carbon Dioxide + Water + ENERGY (ATP)! It consists of two steps.