Question

How long does DNA in urine last?

Answer 1

Hint: Urine is a liquid byproduct of human metabolism as well as that of many other animals. Urine travels from the kidneys to the urinary bladder via the ureters. Urine is excreted from the body through the urethra as a result of urination.

Complete answer:
DNA, or deoxyribonucleic acid, is the genetic material found in humans and nearly all other organisms. Almost every cell in a person's body contains the same DNA. The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but a small amount can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).

Mitochondria are cell structures that convert energy from food into a form that cells can use.
DNA stores information as a code composed of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA is made up of approximately 3 billion bases, with more than 99 percent of those bases being the same in all people. The order, or sequence, of these bases, determines the information available for building and maintaining an organism, much like how letters of the alphabet appear in a particular order to form words and sentences.

Urine, in theory, does not contain DNA. Urine, on the other hand, may contain epithelial cells that can be used to extract DNA. Healthy people, on the other hand, do not typically excrete epithelial cells in their urine. When urine is kept at -20°C for 28 days, approximately 75% of the DNA degrades, making quantitative recovery impossible after this time. A temperature of -80°C enhances recovery after up to 28 days of storage but raises storage expenses.

Thus, DNA in urine lasts for 28 days.

Note: Urine contains some DNA, but not nearly as much as blood or saliva. In addition, DNA degrades faster in urine, making it difficult to extract and produce reliable test results. While DNA can be found in urine, it is linked to the presence of epithelial cells rather than the urine itself. Because women have higher epithelial cell counts that enter their urine through vaginal walls, DNA is often more easily detected in female urine.