Question

which statement best compares and contrasts lipids and carbohydrates?
○ both are used for energy storage, but only carbohydrates are used for long - term energy storage.
○ both are used for energy storage, but only carbohydrates are used for short - term energy storage.
○ both are used for tissues, but only carbohydrates are used for tissue growth.
○ both are used for tissues, but only lipids are used for tissue growth.

Explanation:

1. Analyze the function of lipids and carbohydrates in energy storage: Lipids are mainly used for long - term energy storage (e.g., fat in the body can store energy for a long time), while carbohydrates (such as glucose, glycogen) are used for short - term energy supply.
2. Analyze the wrong options:

• The first option is wrong because lipids are for long - term energy storage, not carbohydrates.
• The third and fourth options are wrong because the main function of both lipids and carbohydrates is energy - related, not mainly for tissue structure or growth (tissue growth is more related to proteins).

Answer:

Both are used for energy storage, but only carbohydrates are used for short - term energy storage.