Which molecules show an appropriate number of bonds around each carbon atom?
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Since carbon atoms are tetravalent (able to form four bonds), atoms may branch off a carbon atom in as many as four places. The ability of a carbon atom to form four different bonds allows carbon to form many different sizes and types of molecules. Carbon atoms may form chains, rings, or combinations of chains and rings. The tetravalence of carbon makes it particularly well-suited to forming the backbone of a huge diversity of organic molecules.
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The molecule shown here contains four functional groups.
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A functional group is a group of atoms bonded together in a specific way that can replace a hydrogen atom in a hydrocarbon. The molecule shown here contains four functional groups (−OH , −SH , −NH2 , and −OPO2−3 ) attached to a carbon chain that is six carbon atoms long.
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Functional groups confer specific chemical properties to the molecules of which they are a part. In this activity, you will identify which compounds exhibit certain chemical properties as well as examples of those six different compounds.
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Select the statement that is incorrect.
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All carbohydrates have the general formula Cn(H2O)n
This formula only applies to simple sugars, which are equal parts carbon and water. Complex sugars, which do not have this general formula, are also carbohydrates.
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know:
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Phospholipids are most important for ...
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know pyramidines and purines
(purine>pyramidine)
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pyct , puag
pyramidine=c,t
purine=a,g
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Which statement expresses a real difference between DNA and RNA?
