Hi Krina, welcome to ranch
As of now there is no SCBCD5, this has been renamed to OCPBCD5. The exam objectives remain the same. This covers EJB3 and JPA 1 (J2EE5)
Releasing soon (probably Dec 2010) will be 2 exams. One is OCP EJB Developer for J2EE6 (EJB 3.1) and next is OCP JPA Developer for J2EE6 (JPA 2)
You be the judge of which one is most suitable to you. In the current version (J2EE 5) there is no separate exam for JPA and if you want to do OCPBCD5, you need to study EJB3 and JPA1 extensively since the exam objectives cover both.
However if you want to do only the separate JPA exam, wait till Oracle releases the exam (hopefully Dec since the Beta exam was closed in Sep.)