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22 Cards in this Set

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DEOXYRIBONUCLEIC ACID (DNA)
A molecule that is present in any of various nucleic acids that are located especially in cell nuclei, are usually the chemical basis of heredity, and are composed of two nucleotide chains held together by hydrogen bonds in a pattern resembling a flexible twisted ladder
NUCLEOTIDE
Any of the basic units of structure of DNA or RNA that consist of a base joined to a sugar with five carbon atoms in a molecule and to a phosphate group
GENE
The structural unit of inheritance in living organisms.
ADENINE
One of four nitrogenous bases utilized in the synthesis of nucleic acids.
THYMINE
Involved in the formation of chemical compounds by a living organism in the preservation and transfer of genetic information.
CYTOSINE
A chemical base that is an important parts of DNA or RNA and codes genetic information in DNA and RNA
GUANINE
A purine base that codes genetic information in DNA and RNA
SUGAR
A sweet substance that is made up wholly or mostly of sucrose
PHOSPHATE
A salt of a phosphoric acid
REPLICATION
Very exact copying or duplication
CHROMOSOMES
One of the rod-shaped or threadlike DNA-containing bodies of a cell nucleus that contain all or most of the genes of an organism and can be seen especially during cell division
CELL DIVISION
A process by which cells increase in number that usually involves division into similar parts of more or less equal size
DOUBLE HELIX
The arrangement in space of DNA that resembles a spirally twisted ladder
CHARGAFF'S RULES
DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases
ROSALIND FRANCIS
Responsible for much of the research and discovery work that led to the understanding of the structure of DNA
JAMES WATSON
One of the discoverers of the structure of the DNA molecule, who along with Francis Crick, and Maurice Wilkins were awarded the 1962 Nobel Prize for Physiology or Medicine
FRANCIS CRICK
One of the discoverers of the structure of the DNA molecule who along with James Watson and Maurice Wilkins were awarded the 1962 Nobel Prize for Physiology or Medicine
ERWIN CHARGAFF
Discovered two rules that helped lead to the discovery of the double helix structure of DNA
BASE PAIR
Two nucleotides on opposite complementary DNA or RNA strands that are connected with hydrogen bonds
X-RAY DIFFRACTION
An analytical technique which uses the diffraction pattern produced by bombarding a single crystal with X-rays to solve the crystal structure
COMPLEMENTARY STRAND
Strands of DNA that are matching
TWISTED LADDER
A DNA molecule that looks like a twisted ladder