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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,812

What comes next in the series?

A, T, G, C, _

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,631

Adenosine, Thymine, Guanine, Cytosine, ... ? DNA is fun!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,812

I expected this would happen.......

A, T, G, C are NOT

Adenine, Thymine, Guanine and Cytosine.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,631

Thank goodness, because I had no idea what came after Cytosine ...

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,812

A, T, G, C..next comes L

Aries, Taurus, Gemini, Cancer,..Leo.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**insomnia****Real Member**- Registered: 2005-03-23
- Posts: 944

If it was DNA, you would have several thousand, million possibilities. ATGC are the only protein bases for DNA.

Good one Ganesh, BTW.

Friends are angels who lift our feet when our own wings have trouble remembering how to fly

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**ahgua****Member**- Registered: 2005-08-24
- Posts: 25

maybe, after ATCG is U.

Uracil is another nitrogenous base of a nucleic acid (RNA, not DNA)

There are only two possible combinations of these nitrogenous base:

AT and CG

Other than that, there is no possible combination as T cannot form hydrogen bond with C and G and A cannot form hydrogen bond with C and G

*Last edited by ahgua (2005-08-25 23:40:02)*

Life is a passing dream, but the death that follows is eternal...

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,631

LOL !!

There you go, ganesh, there **is** a genetic answer !

Thanks for that, ahgua.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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