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DNA structure and function
DNA structure, history, replication, and protein synthesis
25
Biology
9th Grade
02/03/2010

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Term
complementary base pairs
Definition
holds together the two strands of DNA, A pairs with T, G pairs with C
Term
x-ray crystallography
Definition
a technique used to determine the shape of a molecule using the diffraction of x-rays
Term
Watson and Crick
Definition
made the first 3-D model of the double helix of DNA in 1953
Term
Rosalind Franklin
Definition
Took x-ray diffraction photographs of DNA helping Watson and Crick with their work
Term
double helix
Definition
the coiled structure of double stranded DNA
Term
Erwin Chargaff
Definition
Austrian biochemist that determined DNA contains like numbers of adenine/thymine and guanine/cytosine in 1950, led to an understanding of complementary base pairing
Term
nucleic acid
Definition
polymer of nucleotides
Term
nucleotides
Definition
monomer of nucleic acids, made of nitrogen base, sugar, and phosphate
Term
nucleus
Definition
contains DNA, site where RNA is made
Term
DNA
Definition
nucleic acid that stores genetic information
Term
RNA
Definition
nucleic acid used by ribosomes to make proteins
Term
protein synthesis
Definition
process of making new proteins in the ribosome
Term
genetic code
Definition
the nucleotide sequence of codons and the amino acids they code for
Term
chromosome
Definition
a highly coiled strand of DNA
Term
adenine
Definition
nitrogenous base found in DNA and RNA, pairs with thymine or uracil
Term
thymine
Definition
nitrogenous base found in DNA, pairs with adenine
Term
guanine
Definition
nitrogenous base found in DNA and RNA, pairs with cytosine
Term
cytosine
Definition
nitrogenous base found in DNA and RNA, pairs with guanine
Term
uracil
Definition
nitrogenous base found in RNA, pairs with adenine
Term
transcription
Definition
process of copying a gene from DNA into mRNA
Term
mRNA
Definition
messenger RNA that copies a DNA gene and is read by the ribosome
Term
DNA replication
Definition
process of unwinding DNA and assembling a new complementary strand for each old strand
Term
template
Definition
the original strand of DNA which provides the sequence necessary to assemble new strands of DNA
Term
ribosome
Definition
organelle that constructs proteins
Term
translation
Definition
process of copying mRNA into amino acids
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