Question

what are the two cycles of cellular respiration

Answer 1

The two main stages or cycle for cellular respiration

Answer

The two main stages or cycle for cellular respiration is

Kerbs cycle and Electron Transport chain

There are many forms of cellular respiration.

Several organisms need oxygen to carry out respiration known as aerobic cellular respiration and the respiration that does not need the   presence of oxygen is called anaerobic cellular respiration.

Cellular respiration is a sequence of set of metabolic reactions and processes. These reactions takes place in the cells of organisms, where the organisms convert biochemical energy from nutrients into adenosine triphosphate.

Catabolic reactions are involved in respiration, where large molecules are broken into smaller ones, releasing energy in the process. Cells gain useful energy to fuel cellular activity through respiration

There are two types of cellular respiration: Aerobic and Anaerobic respiration.

Aerobic respiration

Aerobic respiration takes place in the presence of oxygen, by which ATP is is produced by the cells by oxidation of organic compounds.

The end product of glycolysis, pyruvate enters the mitochondria to be fully oxidized by the Krebs cycle.

Glycolysis	In glycolysis molecules of glucose in the cytoplasm are broken into molecules of pyruvate. One glucose molecule yields two molecules of pyruvate
TCA cycle	It is also known as Kreb's cycle or Citric acid cycle. This cycle begins after the pyruvate molecules from glycolysis are converted to acetyl CoA. Through a series of steps high energy electrons are produced along with two ATP molecules in this cycle. This cycle occurs only in the presence of oxygen
Electron Transport Chain	Direct supply of oxygen. The ETC is a series of electron carriers in the mitochondrial membrane. Through the reactions high energy electrons are passed to oxygen, a gradient is formed and ultimately ATP is produced.

Anaerobic respiration

It is the process used in some microorganisms in which oxygen is not final electron acceptor.

This process starts like aerobic respiration and stops part way through because oxygen is not available to finish the respiration process.

Lactic acid Fermentation	Anaerobic respiration takes place in humans if there is shortage of oxygen
Alcoholic Fermentation	This does not takes place in humans. The same process happening in mitochondria during lactic acid fermentation happens in alcoholic fermentation in the yeast. The byproduct of alcoholic fermentation is ethyl alcohol.