1. ____ are stored by the body as energy reserves.
Lipids
Carbohydrates
Proteins
Nucleic acids
C?
The keyword here is energy reserves.
All except one provide energy, but under different conditions.
Discover about all four at the link:
http://www.livestrong.com/article/281655-functions-of-lipids-carbohydrates-nucleic-acids-proteins/
The correct answer is Carbohydrates. Carbohydrates are stored by the body as energy reserves in the form of glycogen. To understand how we can determine this answer, we need to review some basic knowledge about biochemistry and human physiology.
Firstly, lipids, including fats and oils, are another source of energy for the body. They are stored in adipose tissues as a long-term energy reserve, but since the question specifically asks about reserves stored by the body, we can eliminate lipids as the answer.
Secondly, proteins are large macromolecules that perform various functions in the body, such as building and repairing tissues, enzymes, hormones, and immune system components. While proteins can be used as an energy source in extreme situations when carbohydrates and fats are not available, they are not the primary energy reserves in the body.
Finally, nucleic acids, such as DNA and RNA, have essential roles in transmitting genetic information and protein synthesis. They are not primarily used as energy reserves by the body.
Now, let's focus on carbohydrates. Carbohydrates are a class of organic compounds that include sugars, starches, and fibers. When we consume carbohydrate-containing foods, our body breaks them down into glucose, the primary source of energy for cells. Excess glucose is stored in the liver and muscle cells as glycogen. Glycogen can later be broken down back into glucose to provide energy when needed, such as during physical activity, fasting, or periods of low blood sugar.
To summarize, the body stores carbohydrates as glycogen to be used as an energy reserve. Therefore, the correct answer to the question is Carbohydrates.