Question

Which of the following is not true of carbohydrates?

a. They include substances commonly called sugars.
b. They are the body's primary source of energy.
c. They are a part of both DNA and RNA.
d. All of the above are true of carbohydrates.

Answer 1

The statement 'c. They are a part of both DNA and RNA' is not true of carbohydrates. Carbohydrates include sugars and are the primary energy source, but DNA and RNA contain different sugars, not typically classified as carbohydrates.

Step-by-step explanation:

The statement that is not true of carbohydrates is: c. They are a part of both DNA and RNA. While carbohydrates do include substances commonly called sugars and are the body's primary source of energy, they are not components of DNA or RNA. Instead, DNA and RNA are made up of nucleic acids, which include a different type of sugar called deoxyribose in DNA and ribose in RNA.

Carbohydrates are a major source of energy, where they are broken down into glucose and then converted into ATP, which is required for proper cellular function. They are also important for providing structural support to many organisms and can be found on the surface of cells as receptors or for cell recognition. These macromolecules are classified into monosaccharides, disaccharides, and polysaccharides, based on the number of sugar units they contain.