structure of DNA 1.1 Flashcards
what information is in herited
genetic
what is dna
the substance that codes for all genetic information in a chemical language
whats the shape of dna
twisted double helix
what is each dna strand made up of
nucleotides
whats a nucleotide made up of
dna base
phosphate
deoxyribose sugar
how many carbon atoms do deoxyribose sugars have
5
what are the different bases called and what do they match with
adenosine with thyamine
guanine with cytosine
what hold the two bases together
weak hydrogen bond
the two strands of dna run in opposite directions what is this called
antiparralel
what does the base sequence of dna form
the genetic code
what are the two types of cells
eukaryotes
prokaryotes
how do prokaryotic cells carry dna
sincle circular chromosomes
smaller circular plasmids
how do eukaryotic cells carry their dna
in linear chromosomes in the nucleus packaged with associattd proteins
what do eukaryotic cells have that prokaryotic cells dont have
membrane bound organelles like chloroplasts or mitochondria
what are the associated proteins dna is wrapped around called
histones