THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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6
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9
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12
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cannot be determined
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Detailed explanation-1: -The 5-carbon sugar (known as a pentose) includes ribose and deoxyribose, which are present in nucleic acid. Both ribose and deoxyribose have five carbon atoms and one oxygen atom.
Detailed explanation-2: -The sugar in DNA has 5 carbon atoms (labelled 1’-5’), and is called deoxy-ribose (hence the “Deoxy-ribo” in DNA). The term “deoxy” refers to the fact that there is no oxygen attached to the 2’ carbon atom. There is a molecule that is similar to DNA but has an oxygen atom at this position.
Detailed explanation-3: -Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P).
Detailed explanation-4: -In order to form a nucleotide (with a ‘t’), you need a third subunit: a phosphate group. A phosphate group consists of a phosphorus atom bonded to four oxygen atoms.