BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Glycogen is a form of glucose, a main source of energy that your body stores primarily in your liver and muscles.

Detailed explanation-2: -Glucose is the main source of fuel for our cells. When the body doesn’t need to use the glucose for energy, it stores it in the liver and muscles. This stored form of glucose is made up of many connected glucose molecules and is called glycogen.

Detailed explanation-3: -Foods that we eat that contain carbohydrates include grains, such as bread and cereal, fruits, and vegetables. Therefore, the primary source of glucose for humans is given by answer choice (B), carbohydrates in the diet.

Detailed explanation-4: -Glucose is central to energy consumption. Carbohydrates, lipids, and proteins all ultimately break down into glucose, which then serves as the primary metabolic fuel of mammals and the universal fuel of the fetus.

Detailed explanation-5: -The stomach and small intestines absorb the glucose and then release it into the bloodstream. Once in the bloodstream, glucose can be used immediately for energy or stored in our bodies, to be used later. However, our bodies need insulin in order to use or store glucose for energy.