Whereas the chromosomes of prokaryotes are relatively gene-dense, those of eukaryotes often contain regions of DNA that serve no obvious function. Simple single-celled eukaryotes have relatively small amounts of such DNA, whereas the genomes of complex multicellular organisms, including humans, contain an absolute majority of DNA without an identified function. This DNA has often been referred to as "junk DNA". However, more recent analyses suggest that, although protein-coding DNA makes up barely 2% of the human genome, about 80% of the bases in the genome may be expressed, so the term "junk DNA" may be a misnomer. COUNT 5
QSN1 What type of organism has relatively gene dense chromosomes? ANS1 prokaryotes QSN2 Regions of DNA that serve no obvious function are often found in what type of organism? ANS2 eukaryotes QSN3 What is referred to as "junk DNA"? ANS3 DNA without an identified function QSN4 What percentage of the human genome is made of protein coding DNA? ANS4 barely 2% QSN5 What percentage of bases in the human genome are expressed by protein coding DNA ANS5 about 80%