NEET BIOLOGY

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: -Answer and Explanation: If there is no oxygen available for a eukaryotic cell, only glycolysis will take place. Glycolysis will occur whether oxygen is present or not.

Detailed explanation-3: -Answer and Explanation: The correct answer is (b) glycolysis. The first step of cellular respiration, glycolysis, can happen with or without oxygen. In the presence of oxygen, the products of glycolysis (pyruvate molecules) go on to be further broken down to produce ATP.

Detailed explanation-4: -Glycolysis produces 2 ATP per glucose molecule, and thus provides a direct means of producing energy in the absence of oxygen. This process of breaking down glucose in the absence of oxygen is aptly named anaerobic glycolysis.[1]

Detailed explanation-5: -Glycolysis is a linear metabolic pathway of enzyme-catalyzed reactions that convert glucose into two molecules of pyruvate in the presence of oxygen or into two molecules of lactate in the absence of oxygen.