<prompt> All are true about streptococcus except:M-protein is responsible for production of mucoid coloniesM- protein is responsible for virulenceMucoid colonies are virulentNo resistance to penicillin has been reported  <response>: Mucoid colonies are due to production of capsule of hyaluronic acid not due to M-protein. Growth characteristic of strep. Pyogenes:On blood agar virulent stains form matt or mucoid colones while avirulent from glossy colonies.M, T, R are proteins found on outer part of cell wall and forms the basis of Griffith classification.M protein acts as virulence factor and antibody against it are protective.T and R protein No relation to virulence 