MUSCLE PHYSIOLOGY

Detailed explanation-1: -Answer and Explanation: The process in eukaryotic cells that will proceed normally whether oxygen is present or absent is b. glycolysis. Processes such as chemiosmosis, oxidative phosphorylation, the citric acid cycle, and electron transport will only occur when there is oxygen present.

Detailed explanation-2: -Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen. If oxygen is present, the pathway will continue on to the Krebs cycle and oxidative phosphorylation. However, if oxygen is not present, some organisms can undergo fermentation to continually produce ATP.

Detailed explanation-3: -In organisms that perform cellular respiration, glycolysis is the first stage of this process. However, glycolysis doesn’t require oxygen, and many anaerobic organisms-organisms that do not use oxygen-also have this pathway.

Detailed explanation-4: -When oxygen is not present, pyruvate will undergo a process called fermentation. In the process of fermentation the NADH + H+ from glycolysis will be recycled back to NAD+ so that glycolysis can continue.

Detailed explanation-5: -Glycolysis is an ancient, major ATP-producing pathway that occurs in almost all cells, eukaryotes and prokaryotes alike. This process, which is also known as fermentation, takes place in the cytoplasm and does not require oxygen.