| 1. | It is the opposite in an-configuration furanose.
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| 2. | If it does bind the furanose ring, it next opens the ring.
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| 3. | G5 hydrogen bonds to the furanose oxygen of C17, helping to position it for in-line attack.
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| 4. | The furanose ring will have either alpha or beta configuration, depending on which direction the anomeric hydroxy group is pointing.
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| 5. | In a-configuration furanose, alpha configuration has the hydroxy pointing down, and beta has the hydroxy pointing up.
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| 6. | With hexoses, short reactions times usually lead to furanose ring forms, and longer reaction times lead to pyranose forms.
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| 7. | A furanose ring structure consists of four carbon and one oxygen atom with the anomeric carbon to the right of the oxygen.
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| 8. | In aqueous solution ribose is 75 % pyranose and 25 % furanose and a different acetal "'4 "'is formed.
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| 9. | Both types of pentoses in DNA and RNA are in their ?-furanose ( closed five-membered ring ) form and they define the identity of a nucleic acid.
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| 10. | The ( much rarer ) reaction between C-1 and C-4 creates a molecule with a five-membered ring, called furanose, after the cyclic ether furan.
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