DNA stands for deoxyribonucleic acid, which is the molecule that carries genetic information in humans and all other living organisms. Deoxyribonucleic acid is composed of four chemical bases: adenine, guanine, cytosine and thymine. The sequence of these bases within DNA encodes genetic information.Know More
Human genomes comprise approximately three billion chemical bases. More than 99 percent of human DNA is identical from individual to individual.
The structure of DNA consists of two connected strands of chemical bases which form a spiral known as a double helix. The double helix structure of DNA was discovered by Francis Crick and James Watson in 1953.
Many viruses do not contain any DNA, and instead rely on RNA. RNA is very similar to DNA and like DNA is essential to all forms of life but is single rather than double-stranded and makes use of uracil as a chemical base in place of thymine.Learn more about Cells
During prophase I of meiosis, homologous chromosomes cross over and contribute genetic information from the mother and father cells. When this happens, the resultant haploid cell contains its own genetic information.Full Answer >
Ribosomes inside cells produce and release proteins based on the genetic information in RNA. RNA is a copy of DNA that contains the same genetic information. The DNA remains stored inside the cell nucleus.Full Answer >
The primary harm from nuclear waste comes from radiation, which can cause health problems in humans and other living organisms and degrade the quality of surrounding air, water and soil. Radioactive waste comes in the form of liquid, solid and gas. The level of radioactivity within nuclear waste varies, as does the time it remains active and capable of causing harm to the environment.Full Answer >
According to HowStuffWorks, nitrogen is important to humans and all other living organisms because it is an important component of amino acids. Humans use amino acids to build proteins that form the building blocks of many biological tissues.Full Answer >