Genomes Flashcards
how does genome size vary between bacteria and archae?
smaller than eukaryotic
what do genomes consist of?
genes for protiens, regulatory sequences,in bacteria = no introns
what are introns?
noncoding DNA which can be transcribed into mrna but not proteins
what are pseudogenes?
gene sequences that have accumulated mutations and are non-functional
what are transposons?
sequence of dna that move about in genome, transpose directly as dna ; transposons to cut and paste or copy
what do retrotransposons do?
reverse transcriptase , always copy
what are bacterial insertion sequences?
contain only a gene for a transposase- for moving arounf
what are bacterial transposons?
insertion sequence on either side of a useful gene
what proportion of genome is transposable elements?
high
what does SINEs stand for?
short interspersed nuclear element
what does LINEs stand for?
long interspersed nuclear element
what area multigene families?
identical repeats of the same gene , groups of very similar genes
