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Glossary of Bio Ch. 11.2

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heredity
passing of physical or mental traits from generation to generation
trait
a physical or mental characteristic
gene
a protein recipe
what is a protein made of?
proteins are made of amino acids
what do proteins do?
they are the "machinery" of cells - proteins make everything happen in a cell
what are the building blocks of DNA?
nucleotides
what is a polymer?
a big molecule made up of many small molecules linked together
what are 2 types of nucleic acids?
DNA and RNA
what are the 3 parts of a nucleotide?
1. sugar
2. phosphate
3. nitrogenous base
how are the 4 DNA nucleotides different from one another?
different nitrogenous bases
what are two different classes of bases?
1. pyrimidines
2. purines
what is the structure of DNA?
double helix
in DNA, C is complementary to ...?
G

C=cytosine
G=guanine
what part of the cell is the 'library' of protein recipes?
nucleus
what is considered to be a photocopy of one protein recipe?
RNA
where are proteins made?
ribosomes
what is a chromosome?
it's one piece of DNA

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