DNA

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DNA, or deoxyribonucleic acid, is a molecule in cells that contains genetic information for an organism's development, growth, and reproduction: 

• Structure

  DNA is a double helix, a spiral ladder made up of two strands that twist around each other. The strands are held together by weak hydrogen bonds between base pairs. The base pairs are adenine (A) paired with thymine (T), and guanine (G) paired with cytosine (C). 

  
  

Location

In eukaryotic cells, DNA is found in the nucleus and in mitochondria, the cell's powerhouses. 

Packaging

DNA is tightly packed into chromosomes within the nucleus. During cell division, chromosomes are visible. 

Discovery

Swiss biologist Johannes Friedrich Miescher first identified DNA in 1869. James Watson and Francis Crick later discovered the double helix structure of DNA. 

Genetic code

DNA is the genetic code that tells the body how to grow and develop. Humans share 99.9% of their DNA with each other. 

• Definition of DNA - NCI Dictionary of Cancer Terms - NCI

  

  National Cancer Institute

Definition of DNA - NCI Dictionary of Genetics Terms - NCI

National Cancer Institute

Meaning, DNA Types, Structure and Functions - BYJU'S

Who Discovered DNA? DNA was first recognized and identified by the Swiss biologist Johannes Friedrich Miescher in 1869 during his ...

BYJU'S

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