X-ray crystallography
Lesson Flashcards: DNA Discovery and Structure
A scientific technique in which X-rays are passed through crystalline substances and the resulting diffraction pattern is analyzed to infer the molecular structure of the crystal
Double helix
A twisted-ladder shape, specifically the shape of a molecule of DNA
Rosalind Franklin
A British scientist whose X-ray crystallography work was central to the understanding of the molecular structure of DNA
Pentose sugar
A sugar molecule that contains five atoms of carbon
DNA (deoxyribonucleic acid)
A nucleic acid molecule that carries the genetic instructions in living things and typically takes the form of a double helix
Polynucleotide
Polymers of nucleotides that make up nucleic acids
RNA (ribonucleic acid)
A single-stranded polynucleotide that results from the transcription of the genetic sequence of a gene, mediates protein synthesis, and can carry the genetic material in some viruses
Phosphodiester bond
The chemical bond that forms between a phosphate group and two sugar molecules in nucleic acids, such as DNA
Complementary base pairing
Specific rules of base pairing, which are critical to DNA replication and transcription, where adenine (A) binds to thymine (T) or uracil (U) in RNA, while guanine (G) binds to cytosine (C)
James Watson, Francis Crick, and Maurice Wilkins
Three British scientists who were awarded the 1962 Nobel Prize for physiology or medicine for the discovery concerning the double helix structure of DNA