Final answer:
In biology, 'pipe' is not commonly associated with 'virtralline ventral proteins'. However, MDR efflux pump proteins in bacteria play a crucial role in pumping out antibiotics and developing multi-drug resistance.
Step-by-step explanation:
In the context of biology, the term 'pipe' is not commonly used to describe its effect on 'virtralline ventral proteins'. It is possible that there is a confusion or a typo in the question.
However, if the question is referring to the role of proteins in bacteria, specifically MDR efflux pump proteins, they play a critical role in pumping out antibiotics from the bacteria. This process allows the bacteria to develop resistance to multiple drugs, making them 'multi-drug resistant'. The up-regulation of MDR efflux pump proteins by riboswitches, in response to specific antibiotics, enables the bacteria to survive and continue growing despite the presence of these drugs.