The ratio of phosphates and sugars in a polynucleotide chain is

2 : 1

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1 : 1

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3 : 1

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4 : 1

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Solution

The correct option is B $3 : 1$
A nucleoside triphosphate is a molecule containing a nitrogenous base bound to a 5-carbon sugar, with three phosphate groups bound to the sugar. They are the building blocks of both DNA and RNA.
So, the correct option is '3 : 1'.

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Similar questions

Regarding the assertion and reason, select the correct option.

Assertion [A]: A polynucleotide chain exhibits polarity.
Reason [R]: At one end of the polynucleotide chain, a phosphate group is found attached to the fifth (5’) carbon of the sugar ring (of the respective nucleotide), and at other end, a free 3’ -OH group is present.

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