BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Which organic molecule serves as the main source of energy for cells? Explanation: Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen. Carbohydrates are the primary sources of energy for most organisms.

Detailed explanation-2: -Complex organic food molecules such as sugars, fats, and proteins are rich sources of energy for cells because much of the energy used to form these molecules is literally stored within the chemical bonds that hold them together.

Detailed explanation-3: -Carbohydrates and lipids are two types of macromolecules that are most often used by cells to synthesize ATP molecules.

Detailed explanation-4: -Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen, usually in a ratio of 1:2:1. Carbohydrates include sugars, starch, cellulose, and glycogen. Carbohydrates are the primary sources of energy for most organisms. The sugar glucose is the main source of energy for cells.

Detailed explanation-5: -Lipids are energy-rich organic compounds made of carbon, hydrogen, and oxygen. Lipids contain more energy than carbohydrates.