DNA
DNA is where all the genetic information of an organism is present.
DNA is a double-stranded molecule composed of nitrogenous bases and is the main place where genetic information is contained.
During the reproduction of a species when the gametes are fertilized, the male's DNA will unite with the female's DNA.
Analyzing the alternatives:
• a) correct!
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• b) incorrect, the structure of DNA is a double helix.
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• c) incorrect, is the main source of genetic information.
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• d) incorrect, amino acids are formed from the reading of DNA by mRNA. These are the nitrogenous bases that are contained in the DNA molecule.
Alternative "A" is correct!