13. Krebs Cycle and ETC require oxygen to occur, making them?

Acetyl CoA is produced during the process of Krebs cycle in the presence of oxygen.

Explanation:

Krebs cycle is also called citric acid cycle. This process is used by living organisms for the release of energy from food molecules in the process of aerobic respiration. In this chemical reaction, oxidation of acetyl-CoA occurs which is obtained from food molecules such as carbohydrates, proteins and lipids. When oxidation of food molecules occurs, energy is released in the form of Adenine tri phosphate (ATP) and carbondioxide gas is produced.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.