Question

the three main functions of carbohydrates are... (choose 3)
long term energy storage
short term energy storage
to be a quick source of energy
form cell membranes
provide carbon support to cell walls
(note: some text may be partially obscured but the core is a multiple - choice question about carbohydrate functions)

Explanation:

To determine the three main functions of carbohydrates, we analyze each option:

• Long - term energy storage: This is mainly the function of lipids (like fats), not carbohydrates. So this is incorrect.
• Short - term energy storage: Glycogen (a carbohydrate) is used for short - term energy storage in animals. This is a correct function.
• To be a quick source of energy: Glucose (a carbohydrate) is quickly broken down to release energy. This is a correct function.
• Provide cell membrane structure: The cell membrane structure is mainly composed of lipids (phospholipids) and proteins. Carbohydrates are not the main component for cell membrane structure. So this is incorrect.
• Provide carbon - based support to cell walls: In plant cell walls, cellulose (a carbohydrate) provides structural support. This is a correct function.
• Formulate: This is not a function of carbohydrates.

So the three main functions of carbohydrates are short - term energy storage, to be a quick source of energy, and provide carbon - based support to cell walls.

Answer:

The three main functions of carbohydrates are:

• Short term energy storage
• To be a quick source of energy
• Provide carbon support to cell walls