What are introns and exons? also what is a peptidoglycan( i hope i spelled that right)

Answer 1

http://en.wikipedia.org/wiki/Exon

http://en.wikipedia.org/wiki/Intron

http://en.wikipedia.org/wiki/Peptidoglycan

Answer 2

thanks the peptidoglycan is pretty clear. but, do you think you could explain the difference between an exon and intron?? in more simple terms

Answer 3

http://www.thefreedictionary.com/intron