2006-08-11 23:24:18 · 7 answers · asked by titi s 1 in Science & Mathematics ➔ Medicine
the real question is what will you do with the anwer to this question? give me 10 points....why not?
2006-08-18 13:53:12 · answer #1 · answered by Anonymous · 0⤊ 1⤋
No, it won't. The sugar must be changed from deoxyribose to ribose for it to be RNA. In your example, you'll have U where T should be. The use of T, not U, is one DNA marker, but the U will pair just like T and so it won't mess up protein manufacture or inheritance. I don't know how often this would happen, though. There is an enzyme that produces 5 methyl cytosine from cytosine in DNA molecules. If you have 5 methyl Cytosine in DNA, it can be deaminated to convert it to thymine (which is 5 methyl uracil), thus causing a mutation that is being blamed for some cases of cancer today.
2006-08-19 17:15:27 · answer #2 · answered by Lorelei 2 · 1⤊ 0⤋
No it will not become RNA. DNA is DNA because of the structure of its sugar moiety, 2'-deoxyribose. RNA uses ribose. The change of a uracil base for a thymine in DNA is not that uncommon, and uracil can still base-pair with the adenine base on the complementary strand.
2006-08-12 19:55:57 · answer #3 · answered by Gene Guy 5 · 1⤊ 0⤋
Listen to Gene Guy. The 'D' in DNA stands for deoxyribo, i.e., a ribose sugar with an oxygen atom removed. Switching in a uracil won't change the identity of the entire strand. Also, RNA can form dimers to yield double-stranded RNA, This is the basis of RNAi technology with knocks down protein expression by dergradation of mRNA. Also, a hybird of one strand of DNA and one strand or RNA can form. The primers for DNA synthesis in mitosis are actually RNA.
2006-08-15 10:32:34 · answer #4 · answered by molgen2000 2 · 1⤊ 0⤋
umm for the most part, dna does contain some uracil at some point in its sequence..its not that different a structure than thymine
and you may say oh but then it doesnt hydrogen bond with the other strand...well actually it does, just it doesnt undergo the usual 'watston and crick' basepair with its reciprocal strand that everyone is used to..
besides think about what percentage of our dna is actually useful..its a small amount and the rest of our dna that doesnt code for anything (aside from portions that are required for initiation of transcription) isnt maintained by natural selection, so small variations dont hurt us if its not being translated into protein...
do you know about how the code is read by a ribosome? in codons of 3 bases right? so even if there is a U in the dna in place of the T, then the mRNA now has a T instead of a U in transcribing...you look at what each codon translate to, and there are about 3 or 4 different codons that could translate to any particular amino acid because of the wobble base
2006-08-12 09:53:51 · answer #5 · answered by hayden160 3 · 1⤊ 1⤋
if only one or few thymine is converted in replication, its actually mutation, but if you meant reduction, then yes it will become RNA, only one chain.
2006-08-12 09:32:45 · answer #6 · answered by Anonymous · 0⤊ 1⤋
yes it will be RNA and the structure will no longer be a doubl helix
2006-08-12 09:18:02 · answer #7 · answered by ? 2 · 0⤊ 1⤋