The five bases of nucleic acidsन्यूक्लिक अम्लों के पाँच क्षारकThe five bases of nucleic acids

NCERT 10.5.1 · Class 12 Chemistry · Chapter 10 · interactive diagram

Parts and what they mean

• Adenine (A) — purine (ऐडेनीन (A) — प्यूरीन) — In DNA and RNA. Pairs with T in DNA (two hydrogen bonds). The N–H at the bottom (N-9) is where the sugar attaches.
• Guanine (G) — purine (ग्वानीन (G) — प्यूरीन) — In DNA and RNA. Pairs with C (three hydrogen bonds).
• Cytosine (C) — pyrimidine (साइटोसीन (C) — पिरिमिडीन) — In DNA and RNA. Pairs with G.
• Thymine (T) — pyrimidine, only in DNA (थाइमीन (T) — पिरिमिडीन, केवल DNA में) — Has a –CH₃ group; uracil does not. Pairs with A.
• Uracil (U) — pyrimidine, only in RNA (यूरैसिल (U) — पिरिमिडीन, केवल RNA में) — Takes the place of thymine in RNA.

Original diagram drawn by Simple Learning Hub, based on NCERT 10.5.1. Report a mistake