Excess carbohydrates can be stored in the muscles in the form

Step 1: Analyze the question The question asks which form excess carbohydrate takes when it is stored in the muscles.

Step 2: The concept Animals store excess glucose as glycogen, a highly branched polysaccharide, sometimes called "animal starch". It is stored mainly in two places:

• The liver, where it is converted back to glucose to keep blood sugar steady.
• The muscles, where it is a ready energy source during exercise.

Step 3: Check each option

• A. Cellulose: a structural carbohydrate in plant cell walls. Animals do not store it, so this is wrong.
• B. Glycogen: the storage carbohydrate of animals, found in muscles and liver. This is correct.
• C. Chitin: a structural polysaccharide in the exoskeletons of arthropods (e.g. insects, crabs) and in fungal cell walls. It is not a storage form, so this is wrong.
• D. Lipids: fats are a storage form, but they are not carbohydrates. They are stored in adipose tissue, and the question asks for the form of the carbohydrate, so this is wrong.

Step 4: Answer The correct option is B. glycogen.

Tip: Remember the pairing "Plants store Starch, Animals store Glycogen." Cellulose and chitin are structural (building materials), not storage. Starch and glycogen are storage.