-Unbroken stretches of proteins
-Unbroken stretches of nucleotides
-Alternating segments of proteins called introns and exons
-Alternating segments of nucleotides called introns and exons
2006-12-11 04:37:36 · 5 answers · asked by PeachyFixation 4 in Science & Mathematics ➔ Biology
Group I and group II introns are a special type of intron and are different from nuclear introns (which are common in humans) because they are capable of self-splicing. Group I and II introns are predominantly found in organelle genomes (chloroplast or mitochondria) and prokaryotic tRNA and rRNA genes (which are not translated into proteins). So yes bacteria can have these type of introns, but it is limited to a specific type of gene. It is generally taught that prokaryotes don't have introns which is one of the ways they differ from eukaryotes, but as pointed out this isn't the whole story. Hopefully as awareness of group I and II introns increases, this will be corrected.
For your purposes, the answer is unbroken stretches of nts.
2006-12-11 05:20:48 · answer #1 · answered by niki jean 2 · 0⤊ 0⤋
Unbroken setretches of nucleotides.
The paper Jerry posted is about a mobile element (typically called transposons), nothing to do with introns and exons as typically thought of.
Bacteria lack the spicing machinery to reconstruct mRNA from a series of introns and exons.
2006-12-11 05:19:40 · answer #2 · answered by Anonymous · 1⤊ 0⤋
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2016-12-11 06:57:17 · answer #3 · answered by goslin 4 · 0⤊ 0⤋
OK...
Bacterial clearly have their DNA divided into introns and exons.
This article describes this in detail for Lactobacillus.
http://www.genesdev.org/cgi/content/full/11/21/2910
2006-12-11 04:39:54 · answer #4 · answered by Jerry P 6 · 0⤊ 3⤋
unbroken streches of nucleotides
2006-12-11 04:39:51 · answer #5 · answered by chiman 3 · 1⤊ 0⤋