Correct option is C
In eukaryotic cells, the cytoskeleton consists of microtubules and actin filaments that provide structural support, intracellular transport, and cell movement. These filaments interact with specialized cytoskeleton-binding proteins, which regulate their dynamics.
- Microtubules: Composed of tubulin dimers, these are responsible for cell shape, intracellular transport, and chromosome segregation.
- Actin Filaments: Composed of actin monomers, these contribute to cell motility, shape, and intracellular transport.
Tau (iii) - Microtubules (X) - (a) Filament Cross-Linking (Correct)
- Tau is a microtubule-associated protein (MAP) that cross-links and stabilizes microtubules, preventing depolymerization.
- Correct match: X-(iii)-(a).
Ketenin (i) - Microtubules (X) - (d) Only Severs Filament (Correct)
- Ketenin is known to sever microtubules but does not significantly affect their regrowth.
- It severs microtubules into smaller fragments, disrupting the filament network.
- Correct match: X-(i)-(d).
Tropomodulin (ii) - Actin (Y) - (c) Prevents Assembly and Disassembly at Minus End (Correct)
- Tropomodulin is an actin-binding protein that caps the minus end of actin filaments.
- By capping the minus end, it prevents both polymerization and depolymerization at that site, regulating filament length.
- Correct match: Y-(ii)-(c).
Gelsolin (iv) - Actin (Y) - (b) Severs Filaments and Binds to Plus End (Correct)
- Gelsolin is an actin-severing protein that plays a role in actin filament turnover.
- It cuts actin filaments into shorter fragments and binds to the plus end, preventing further elongation.
- Correct match: Y-(iv)-(b).
