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14 Cards in this Set

  • Front
  • Back
DNA is a ____ composed of ____ called ____.
polymer; monomers; nucleotides
Each nucleotide contains...
phosphate group, pentose sugar, and a nitrogenous base
What are the four nitrogenous bases?
thymine, cytosine, adenine, guanine
Which of the nitrogenous bases are purines and pyrimidines?
T and C are pyrimidines and A and G are purines
Cells double their DNA before...
During mitosis, doubled DNA is...
equally divided into the daughter cells
Diploid cells have ___ times the amount of DNA as haploid cells, but haploid and diploid cells have the same amount of ____
2; protien
What is the width of the helix in DNA? A full turn on the helix happens every... and there are ____ nigtrogenous bases within every turn of the helix
2 nm; 3.4 nm; 10
Which of the nitrogenous bases always pair together?
A&T; C&G
DNA is antiparrallel...what does this mean?
One strand is 5' to 3' and the one attached is 3' to 5'
in DNA replication, free ____ line up singly along the template in accordance with the ____ rules; the ____ link together
nucleotides; base-pairing; nucleotides
each new DNA has one ____ and one ____ strand
old; new
List/explain the 3 possible models of DNA replication:
1. CONSERVATIVE: the parent molecule is intact and the new molecule is made entirely of new nucleotides
2. SEMICONSERVATIVE: template model; both old and new DNA molecules have one old and one new strand
3. DISPERSIVE: old and new DNA molecules are mixtures on cell strands
Which DNA replication model was correct?