AP BIOLOGY

Detailed explanation-1: -The first stage of cellular respiration, called glycolysis, takes place in the cytoplasm. In this step, enzymes split a molecule of glucose into two molecules of pyruvate, which releases energy that is transferred to ATP.

Detailed explanation-2: -Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Glycolysis consists of an energy-requiring phase followed by an energy-releasing phase.

Detailed explanation-3: -Step 1: Glucose is phosphorylated by the enzyme hexokinase to form glucose 6-phosphate. Glucose gains energy by being phosphorylated at the expense of one ATP. Step 2: Glucose 6-phosphate is converted into its isomer, fructose 6-phosphate, by an isomerase enzyme.

Detailed explanation-4: -The energy-releasing phase-steps 6-10 of glycolysis-occurs twice, once for each of the two 3-carbon sugars produced during steps 1-5. The first energy-releasing step-considered the 6th step of glycolysis overall-consists of two concurrent events: oxidation and phosphorylation of G3P.

Detailed explanation-5: -GLYCOLYSIS. Stage 1 (Priming stage) Stage 2 (Splitting stage) Stage 3 (Oxidoreduction-phosphorylation stage)