Which of the following statement is incorrect with respect to pyrimidines?(a) Heterocyclic(b) 7 membered ring(c) Cytosine is an example of pyrimidine(d) Single-ring structureThe question was posed to me in semester exam.Origin of the question is Molecular Basis of Inheritance topic in division Molecular Basis of Inheritance of Biology – Class 12

Which of the following statement is incorrect with respect to pyrimidi

1.	Which of the following statement is incorrect with respect to pyrimidines?(a) Heterocyclic(b) 7 membered ring(c) Cytosine is an example of pyrimidine(d) Single-ring structureThe question was posed to me in semester exam.Origin of the question is Molecular Basis of Inheritance topic in division Molecular Basis of Inheritance of Biology – Class 12
Answer» Right option is (b) 7 membered ring For explanation I would SAY: PYRIMIDINES are not 7 membered rings. Pyrimidines are a TYPE of nitrogenous bases which are HETEROCYCLIC COMPOUNDS with a 6 membered single-ring structure. Nitrogen is present at 1 and 3 positions of the rings. Examples of pyrimidines include thymine, uracil, and cytosine.

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