** Shares of Nexsen Limited NXN.AX rise as much as 20.6% to A$0.205; set for strongest trading session ever, if current trend holds
** Nano biotech firm appoints MCRA, a multi-service, integrated business advising co to accelerate its U.S. market entry for its GBS Rapid Sensor and Kidney Function Diagnostics
** MCRA to also advise co on its U.S. FDA regulatory pathway
** Stock down 31.6% since trading debut on October 14, including the day's moves
(Reporting by Aamir Shaik Khalid in Bengaluru)
((aamir.sheikkhalid@thomsonreuters.com))