Question

Choose an odd one w.r.t presence in DNA
(1) Adenylic acid
(2) Guanylic acid
(3) Cytidylic acid
(4) Uridylic acid
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Answer 1

Answer:

Uridylic Acid Is the answer of this question

Answer 2

Answer

4) Uridylic acid

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Explanation

According to Chargaff's rule, base pairing in DNA should resemble with A = T; C = G

Chargaff's Rule; according to this rule,

• Adenine = Thymine
• Guanine = Cytosine (Purines = Pyrimidines)

But their sum's are not equal to each other.i.e. A + T ≠ G + C

A nucleotide is the monomers whose repetition makes polynucleotides or nucleic acid like DNA and RNA.

Nucleotide consists of three components:

1) Nitrogenous baseIt further consists of two types i.e. Purine and Pyrimidine.

→ Purine = Adenine, Guanine

→ Pyrimidine = Cytosine, Thymine [Uracil in RNA only]

2) Pentose sugar

3) Phosphoric acid

A nucleoside is formed by the combination of nitrogeneous base and pentose sugar.

In the structure of DNA (double-stranded structure), Purine always makes a hydrogen bond with Pyrimidine. Adenine (A) makes the double bond with Thymine (T) and Cytosine (C) make a triple hydrogen bond with Guanine (G).