Q2. which species eats chiton? mussel starfish whelk barnacles

Chitons are classified under phylum mollusca. the main predators of the species chiton are starfish and snails. whelks are sea snails, but instead of eating chitons, they mostly feed on barnacles and mussels. as for the mussels and barnacles, they ingest algae and phytoplankton through filter-feeding. 

Pro insulin undergoes extensive posttranslational modification along the production pathway .