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no we not use resistance in place of diode.
Backward diode
its the simplest thing to do. There are three legs in a transistor, one each of collector, base and emitter. So if you need to use it as a diode, just connect either collector-base or emitter-base. Say, if you use an NPN transistor, then the base region will be the anode of diode and emitter or collector will be the cathode of the diode.
Bipolar Transistors and Diode's .
There are thousands of different zener diode types...use the internet to locate a data sheet for a particular type.