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campbell's AP biology chapter 16
Molecular basis of inheritance
15
Biology
9th Grade
04/09/2010

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Term
virus
Definition
DNA of RNA enclosed in a proteictive protein coat
Term
transformation
Definition
assimilation fo external DNA by the cell
Term
structure of DNA
Definition
double helix
purine and pyrimidine are always opposite each other
DNA is antiparallel 5' to 3'
sugar phosphate background
Term
base pairing
Definition
bases always match up, A with T and C with G
Term
conservative model
Definition
two parent strands come back together
one daughter cell has all new DNA, other daaughter cell has all old DNA
Term
semi consevative model
Definition
each daughter cell had on eold strand of DNA and one new strand
Term
chargafff's rules
Definition
Adenine concentration equals Thymine concentration and Cytosine concentration equal Guanosine concentration
Term
dispersive model
Definition
mix of old and new DNA in cells
Term
helicase
Definition
unwinds DNA
Term
topoisomerase
Definition
releaves DNA strain and keeps it open and untwisted
Term
single-strand binding proteins
Definition
keeps DNA open
Term
Primase
Definition
RNA primer
Term
DNA polymerase
Definition
adds nucleotides
replaces RNA for DNA
Term
DNA ligase
Definition
joins DNA fragments
Term
nucleosome
Definition
8 histones with DNA wrapped around them twice
joined by linker DNA
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