Sugars of nucleic acids: β-D-ribose and β-D-2-deoxyriboseन्यूक्लिक अम्लों की शर्करा: β-D-राइबोस और β-D-2-डीऑक्सीराइबोसSugars of nucleic acids: β-D-ribose and β-D-2-deoxyribose

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

Parts and what they mean

• β-D-Ribose — sugar of RNA (β-D-राइबोस — RNA की शर्करा) — An aldopentose (C₅H₁₀O₅) in the five-membered (furanose) ring form. Sugar carbons are numbered 1′–5′ to keep them apart from the base atoms.
• β-D-2-Deoxyribose — sugar of DNA (β-D-2-डीऑक्सीराइबोस — DNA की शर्करा) — C₅H₁₀O₄: “deoxy” = one oxygen less, at C-2′.
• C-1′ (base attaches here) (C-1′ (क्षारक यहाँ जुड़ता है)) — In a nucleoside this –OH is replaced by the base (β position).
• C-1′ (base attaches here) (C-1′ (क्षारक यहाँ जुड़ता है)) — Same as in ribose.
• C-2′ of ribose: –OH (राइबोस का C-2′: –OH) — Present in RNA.
• C-2′ of deoxyribose: –H (no oxygen) (डीऑक्सीराइबोस का C-2′: –H (ऑक्सीजन नहीं)) — The only difference between the two sugars.
• C-5′ (–CH₂OH) (C-5′ (–CH₂OH)) — Phosphoric acid is attached here in a nucleotide.
• C-5′ (–CH₂OH) (C-5′ (–CH₂OH)) — Phosphoric acid is attached here in a nucleotide.

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