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Nucleotides and Nucleosides

The presence ...

Question

The presence of thymine at the place of uracil also confers additional stability to DNA. How?

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Solution

Thymine at the place of uracil confers to additional stability because thymine has greater resistance to photochemical mutation, making the genetic material more stable. It also forms hydrogen bonds with adenine giving it extra stability.

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Q. Choose the correct statements among the following.
A. Both DNA and RNA can mutate
B. RNA being unstable mutates at a faster rate
C. RNA is also known to be catalytic, hence it is reactive.
D. The presence of uracil at the place of thymine confers additional stability to DNA.

how does CH3 group in thymine facilitated its presence in DNA (or) why is thymine present in DNA instead of uracil.

Q. The pyrimidine base which confers additional stability to DNA over RNA is

Q. Write the main structural difference between DNA and RNA. Of the bases, thymine and uracil, which one is present in DNA?

Q. Which of these is not present in DNA?
(a) Adenine
(b) Thymine
(c) Uracil
(d) Cytosine

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