The correct answer is A. DNA.
DNA is a molecule that contains the genetic code of an organism. It is made up of four types of nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The sequence of these nucleotides determines the organism’s genetic makeup.
DNA is located in the nucleus of every cell. It is responsible for controlling the cell’s activities and for passing on genetic information from parents to offspring.
Enzymes are proteins that catalyze chemical reactions. They are essential for life, as they allow cells to function properly.
Nucleotides are the building blocks of DNA and RNA. They are made up of a sugar, a phosphate group, and a nitrogenous base.
RNA is a molecule that is similar to DNA. It is involved in the process of protein synthesis.
DNA is the correct answer because it is the molecule that contains the genetic code of an organism. The other options are not correct because they are not involved in the control of inherited traits.