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15 Cards in this Set

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  • Back
The molecular structure of DNA is made of long units called...
nucleotides
Each nucleotide consists of...
5-carbon sugar (deoxyribose), phosphate group, nitrogenous base
The nitrogenous bases consist of...
Purines and Pyrimidines
Purines have 2 rings and consist of...
adenine and guanine
Pyrimidines have one ring and consist of...
cytosine and thymine
The backbone (sides of the ladder) of the DNA structure consists of...
sugar and phosphate
Nitrogenous bases...
stick out sideways from the backbone, the "rungs of the ladder"
Nucleotides can be joined together...
in any order, any sequence is possible.
In 1952, Francis Crick and James Watson discovered...
DNA is a double helix, 2 strands wound around each other "twisted ladder"
Hydrogen bonds...
form between bases with just enough force to hold strands together
Nitrogenous Base pairing...
adenine=thymine
cytosine=guanine
In Prokaryotic cells (bacteria), DNA is found in the ___________, because the do/do not have a nucleus.
cytoplasm, do not
In Eukayotic cells, DNA is found in the ___________, because the do/do not have a nucleus.
nucleus, do
Length of DNA molecules...
Very Long!!!
DNA replication takes place in
interphase