Explain the process of DNA isolation.

Lysis, precipitation and purification

Explanation:

DNA isolation is a molecular biology technique based on the extraction of DNA and subsequent purification to remove inhibitors that may hamper the process of amplification. DNA isolation consists of three steps:

1- Lysis: it consists of the mechanical disruption of the cell, where the nucleus is broken to release DNA. During this process, it is required to use enzymes and detergents such as Proteinase K

2- Precipitation: during this process, the DNA is precipitated by using alcohol and salt.  

3- Purification: this process removes the impurities from DNA. Extraction is carried out by washing DNA with ethanol and water.

i believe the answer is a or 1

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.