The three appropriate built-in predefined tests that can be performed to verify a VM replica started in a Virtual Lab are the Application test, Heartbeat test, and Ping test. The Application test checks if the applications within the VM replica are functioning correctly. The Heartbeat test verifies the operational state by checking for the heartbeat signals, indicating that the VM is running smoothly. The Ping test checks the network connectivity of the VM to ensure it can communicate over the network. These tests cover critical aspects of a VM's functionality in a Virtual Lab environment.