MUSCLE PHYSIOLOGY

Detailed explanation-1: -Glycolysis is the first step in cellular respiration that occurs in the cytoplasm within the mitochondria.

Detailed explanation-2: -The first stage of cellular respiration is glycolysis. This process is shown in the top box in Figure 5.9. 3 showing a 6-carbon molecule being broken down into two 3-carbon pyruvate molecules. ATP is produced in this process which takes place in the cytosol of the cytoplasm.

Detailed explanation-3: -There are three main steps of cellular respiration: glycolysis, the citric acid cycle, and oxidative phosphorylation. Glycolysis takes place in the cytosol, the citric acid cycle occurs in the mitochondrial matrix, and oxidative phosphorylation occurs on the inner mitochondrial membrane.

Detailed explanation-4: -Step 1 of glycolysis: Hexokinase catalyzes the phosphorylation of glucose, where glucose and ATP are substrates for the reaction, producing a molecule glucose-6-phosphate and ADP as products. The paragraph above states that the enzyme hexokinase has “broad specificity".