AP BIOLOGY

Detailed explanation-1: -Carbohydrates are the quickest, and fats are the slowest. Carbohydrates, proteins, and fats are digested in the intestine, where they are broken down into their basic units: Carbohydrates into sugars. Proteins into amino acids.

Detailed explanation-2: -Carbohydrates are preferred and broken down to synthesize ATP molecules.

Detailed explanation-3: -The four stages of cellular respiration are glycolysis, oxidative decarboxylation of pyruvate, the citric acid cycle, and oxidative phosphorylation. Glycolysis occurs in the cytoplasm of cells while decarboxylation, the citric acid cycle, and oxidative phosphorylation occur in the mitochondria.

Detailed explanation-4: -Answer and Explanation: The correct answer: The macromolecule which acts as the primary energy source for an organism is D) carbohydrate. The primary source of energy in most of the organisms is carbohydrate as it is the most abundant in most of the organism.

Detailed explanation-5: -The correct answer is carbohydrates because amylase is the enzyme that is able to break these macromolecules down into smaller parts.