Question

use the diagram above to answer questions 1 - 3.

1. in the diagram above, which of the following is the identity of molecule a? a carbohydrates b proteins c nucleic acids d lipids
2. in the diagram above, which of the following is the identity of molecule b? a carbohydrates b proteins c nucleic acids d lipids
3. which of the following is the best reason that both of these molecules would be considered organic compounds? a they both contain atoms of oxygen b they are both used to store energy c they both contain carbon and hydrogen d they are both found in cellular structures
4. a primary difference between the two types of molecules shown above is that only the nucleic acid is able to - a store chemical energy b transmit information c be used to create cell walls d be classified as a polymer

Explanation:

1. Lipids are non - polar, used in cell - membrane formation and for energy storage, and are not polymers. So molecule A is lipids.
2. Carbohydrates are produced during photosynthesis and used to make cell walls. So molecule B is carbohydrates.
3. Organic compounds are defined by the presence of carbon and hydrogen.
4. Nucleic acids (like DNA and RNA) are responsible for transmitting genetic information, while carbohydrates are not.

Answer:

1. D. lipids
2. A. carbohydrates
3. C. They both contain carbon and hydrogen
4. B. transmit information