NEET 2012 · Class 12

Molecular Basis of Inheritance

The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component "X" in it.

  1. (A)Cholesterol | Guanine
  2. (B)Amino acid | NH2
  3. (C)Nucleotide | Adenine
  4. (D)Nucleoside | Uracil

The NCERT line that answers it

Concept-grounded

A nitrogenous base is linked to the OH of 1' C pentose sugar through a N-glycosidic linkage to form a nucleoside, such as adenosine or deoxyadenosine, guanosine or deoxyguanosine, cytidine or deoxycytidine and uridine or deoxythymidine.

Chapter
Molecular Basis of Inheritance
Section
5.1.1 Structure of Polynucleotide Chain

The answer is taught in this NCERT section but is not one quotable sentence. It needs combining facts or applying the idea.

How this line gives the answer

Claim discrepancy: claimed C, GPT says D. Matched with override at hybrid rank 1.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 2012 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.