Respuesta :

1. Nucleic acids are used in the nucleus of living cells to store genetic information.
2. Methylating nucleic acids switches off genes
3. Virus's replicate their own nucleic acids before infecting a cell
4. nucleic acids can form RNA as well as DNA

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Answer AND Explanation:

FACTS:

1. DNA is a big biological molecule which contains the genetic information of every organism. This information is specially codified to produce proteins which are necessary for life and biological functions of different organism.

2. DNA is compound by nitrogenic basis that are called adenine, guanine, timine and cytosine which unit with each other making a pair of bases in thousands of different combinations.

3. The simple unity that forms whit DNA molecules  is called nucleotid. A nucleotid is a molecule which is formed by a pentose(is a type of sugar); a nitrogenic base wich can be purinic or pirimidinic and fosforic acid, all of them united by an especifical bond.

Fib:   The DNA is compound by nitrogenic basis called adenine, guanine, timin and cytosine who aparean with each other making a pair of bases in thousands of different combinations. Sometimes, DNA can contains uracil in their structure to stabilize the molecule.