Hi,
For all the circuits which having the Diode, Those will be ON state.
Simple whenever a Diode is forward biased, the circuit will be on (Low resistance path). How the Diode is forward biased ? Whenever the Anode of the diode is connected to the Positive supply pin and Cathode of the diode connected to the Negative power supply.
Reverse bias means connecting Anode to Negative pin of supply and Cathode to the Positive supply pin. I feel you understood.
(personally suggests to study something basic Electronics)
-Paul