Thanks for your reply!!
for my questions:
2 ) i meant to ask business roles?e.g in CRM -that controls the look and feel of CMR UI portal? e.g. transaction CRMC_UI_PROFILE, that contains CRM business roles- controlling the CRM UI portal pages..
Here roles you have suggested for SRM are PFCG roles and will only contain ABAP objects!!
3) Any SAP learning educational books- containing Security aspects in SRM? archichecture..
BR,
Naveen