Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences Developmental Biology Morphogenesis and organogenesis in animals
Which of the following best describes the role of the LIN-3 ligand in C. elegans vulva induction?
1
LIN-3 disinhibits the activity of the EGF receptor LET-23, preventing vulval development
2
LIN-3 is produced by the VPCs themselves to promote their own division and differentiation independently of the gonad signals.
3
LIN-3 acts as an inhibitor of the LET-60 Ras protein, indirectly controlling vulval formation by modulating signal transduction.
4
LIN-3, produced by the anchor cells, binds to the EGF receptor LET-23 on VPCs, initiating a signaling cascade essential for vulval development.