Molecular Basis of Inheritance Question 124

124. Select the correct option:

[2014] Direction of RNA Direction of reading of synthesis the template DNA strand

(a) $5 \cdot-3$

(b) $3-5$

(c) $5^{\prime}-3^{\prime}$

(d) $3^{\prime}-5^{\prime}$

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Answer : a

Hints & Solution

(a) Synthesis of RNA exhibits several features that are synonymous with DNA replication. RNA synthesis requires accurate and efficient initiation, elongation proceeds in the $5^{\prime} \to 3^{\prime}$ ’ direction (i.e. the polymerase moves along the template strand of DNA in the $3^{\prime} \to 5^{\prime}$, direction), and RNA synthesis requires distinct and accurate termination.



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