dddna Flashcards
what is a histone
the protein that dna is wrapped around
do prokaryotic cells have histone complexes
no
when dna is wrapped a histone what is formed
chromosome
what is an allele
different versions of the same gene
what is the strcuture of dna
a double helix with strands bonded by hydrogen bonds between nirogenous bases and phosphodiester bonds between nucleotides
define genome
the complete set of genes in a cell including those in mitochondria and chloroplasts
define proteome
the full range of proteins produced by the genome
what is mRNA
a long strand that is arranged into a single helix
what is the function of mRNA
acts as a template for DNA in protein synthesis
what is a codon
three bases that are complementary to a triplet in DNA
what will a sequence of codon do
determine the amino acid sequence of a specific polypeptide that will be made
what is tRNA’s structure
a single stranded chain folded into a clover leaf shape, with one end of the chain extending over the other - at this part of the molecule is where the AA can easily attach
where is an anticodon located
opposite end of a tRNA molecule
define degenerate code
several codons that code for one amino acid
what is an anticodon
three more nitrogenous bases that are complementary to the codon
