In this paper we consider a diffusion based molecular communication network. The information is encoded in the concentration of the signalling molecules at the transmitter end. At receiver end these signalling molecules react with a set of chemical reactions referred as a receiver molecular circuit to produce output molecules. In this work we employ a reversible conversion (RC) type receiver molecular circuit. The number of output molecules in time t is the output signal of receiver. We aim to investigate the context-dependent behaviour of molecular networks i.e. the change in properties of upstream system upon its connection with downstream system. Like many engineering systems this context dependence is caused by retroactivity which is the loading effects on an upstream system by a downstream system. The objective of this research work is to study the effects of this retroactivity on the performance of a molecular communication network with RC receiver circuit. We find that with the increase in retroactivity the gain and information transmission capacity of the system is reduced whereas the noise in the system is increased.