The word "consciousness" means at least 40 distinct things; some of those (e.g. brain being alive and functioning) are obviously connected to microtubles; others (e.g. qualia, which is what most understand Penrose invoked microtubles to explain) are so ill-defined as to be untestable and unfalsifiable.
That Penrose also seems to have a fundamental error in his understanding of the implications of Gödel's incompleteness theorems, doesn't help.
That Penrose also seems to have a fundamental error in his understanding of the implications of Gödel's incompleteness theorems, doesn't help.