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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The 5ʹ end has a hydroxyl group attached to the number 5 carbon of ribose
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The 5ʹ end has a phosphate group attached to the number 5 carbon of ribose
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The 5ʹ end has thymine attached to the number 5 carbon of ribose
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The 5ʹ end has a carboxyl group attached to the number 5 carbon of ribose
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Detailed explanation-1: -Which of the following statements about the 5’ end of a polynucleotide strand of RNA is correct? The 5’ end has a phosphate group attached to the number 5 carbon of ribose.
Detailed explanation-2: -For each nucleotide, the sugar is the 3′ end, and the phosphate is the 5′ end. The phosphate group attached to the 5′ carbon of the sugar on one nucleotide forms a phosphodiester bond with the hydroxyl group attached to the 3′ carbon of the sugar on the next nucleotide.
Detailed explanation-3: -Each DNA chain has polarity referred to as 5’end (where 5’ carbon at one end of the molecule has a phosphate group) and 3’end (where 3’ carbon at the other end of the molecule has a hydroxyl group).
Detailed explanation-4: -Each end of DNA molecule has a number. One end is referred to as 5’ (five prime) and the other end is referred to as 3’ (three prime). The 5’ and 3’ designations refer to the number of carbon atom in a deoxyribose sugar molecule to which a phosphate group bonds.