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17 terms

3.3 DNA Newcomb

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Nucleotide
The building blocks of DNA, composed of a phosphate group, deoxyribose sugar, and a nitrogenous base.
Deoxyribose
A sugar that is derived from ribose - containing five carbons, 10 hydrogens, and 4 oxygens.
Nitrogenous base
Bases used in the construction of nucleotides.
Phosphate
PO4-3, composed of phosphorus and oxygen.
Adenine
Nitrogenous base paired with thymine.
Thymine
Nitrogenous based paired with adenine.
Guanine
Nitrogenous base paired with cytosine.
Cytosine
Nitrogenous base paired with guanine.
Strand
Each of these is shaped like a spiral staircase, used in DNA.
Complementary base pairs
The two bases that make up each rung - two combinations: adenine-thymine and cytosine-guanine.
Hydrogen bonds
Bonds that help hold complementary base pairs together.
Double helix
Shape that DNA molecules take the form of.
Sugar-phosphate backbone
Strands that form the double helix shape.
Covalent bonds
The bonds that link the 5-carbon sugars to the phosphates in the backbone.
Phosphate
The component of the DNA molecule that polarizes it, causing it to react positively to water.
Purines
Adenine and guanine.
Pyrimidines
Uracil, thymine, and cytosine.