Tobacco mosaic virus and bacteriophageतंबाकू मोज़ेक वायरस और बैक्टीरियोफेज

NCERT Fig 2.6 · interactive diagram

Parts and their functions

• Capsid (कैप्सिड) — Protein coat made of small subunits called capsomeres (helical in TMV). Protects the nucleic acid.
• RNA (RNA) — Genetic material of TMV — plant viruses generally have single-stranded RNA.
• Head (शीर्ष) — Polyhedral protein head (capsid) of the phage, holding the DNA.
• DNA (DNA) — Bacteriophages usually have double-stranded DNA. No virus has both DNA and RNA.
• Collar (कॉलर) — Joins the head to the tail sheath.
• Sheath (आच्छद) — Hollow tail sheath through which DNA is injected into the bacterium.
• Tail fibres (पुच्छ तंतु) — Attach the phage to the bacterial cell wall.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 2.6. Report a mistake