The main components of urine are water (about 95%), nitrogenous wastes (urea, uric acids and ammonia), and creatinine (waste products).

The image you sent displays a diagram of a kidney, not DNA. However, I can still provide the objectives of DNA as requested.

The primary objective of DNA (Deoxyribonucleic Acid) is to carry the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Specifically, the objectives of DNA include:

1. Genetic Information Storage: DNA stores all the hereditary information that defines an organism, encoding the sequences for proteins and functional RNA molecules.
2. Replication: DNA must be able to make exact copies of itself to ensure that genetic information is accurately passed from parent cells to daughter cells during cell division, and from one generation to the next.
3. Gene Expression: DNA directs the synthesis of proteins through the processes of transcription (DNA to RNA) and translation (RNA to protein), allowing the genetic information to be expressed as functional molecules.
4. Mutation and Variation: While stable, DNA can undergo changes (mutations) that introduce genetic variation. This variation is crucial for evolution and adaptation of species over time.