Why does aerobic respiration need oxygen?

Answer 1

AnswerIn some cases it's not. Many organisms get along quite well without O2. And that (for a short time) includes most (not all) of the cells of your body. This form of respiration is called anaerobic respiration, of which there are two forms (alcohol and lactic acid).

However, all the multicellular animal organisms that we know share the "Kreb's cycle" via mitochondria that need oxygen for cellular respiration, because your mitochondria (or their genes) can't utilize any other oxidizers.

Some extremophiles (bacteria in cave ecosystems) can use other oxidizers (like nitrogen or sulfur) due to the lack of oxygen in their environment. Both nitrogen and sulfur are similarly strong oxidizers to pull electrons from the electron transport chain.

Answer 2

Yes.

There are many different kinds of fats, but each is a variation on the same chemical structure. All fats consist of chains of carbon and hydrogen atoms, with a carboxylic acid group (contain oxygen) at one end. Bonded to a backbone structure, often glycerol (a "backbone" of carbon, hydrogen, and oxygen).

Answer 3

Oxygen is needed for the Electron Transport Chain, or ETC for short. Oxygen's role in ETC is as the final acceptor of electrons. The transfer of electrons pumps hydrogen protons across the inner mitochondrial membrane through ATP Synthase and this gradient is used to synthesize energy in the form of ATP. This step produces around 30 ATP, this being the most out of all of the three steps of cellular respiration.

Answer 4

Because fat bypasses glycolysis, which is the step in respiration that doesn't require oxygen to make ATP (fermentation). The fatty acids in fat can be catalyzed by enzymes into acetate, and later, acetyl Co-A, so it can go straight into the Krebs Cycle.

Answer 5

Yes because Oxygen is needed to oxidize organic compunds to extract energy from them, Fat will be used as a secondary form of energy in the form of "Adipose Tissue" the average human has a capacity of 80,000 to 120,000 kcal stored internally used for energy that is the equivilant of running 119 miles. Also fat does not turn into ATP it simply re-synthsises the energy bond between the Adenosine Diphospate and severed singular phosphate, this forms the ADP to ATP, so it can be used for energy again. :) Sorry for any spelling mistakes

Answer 6

Oxygen is necessary for the respiration of fat because the fatty acids are oxidized and this process releases energy.

Answer 7

Oxygen is needed for accept electrons. Eventually water is produced

Answer 8

So the respiration can move further from the glycolisis. Oxygen act as last electron acceptor

Answer 9

Yes oxygen is needed. But in anaerobic respiration oxygen isn't needed.

Answer 10

to produce ATP in the end of cellular respiration, the process in which ATP generated by oxygen is known as

oxidative phosphorylation!