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If beta glucose didn't flip the OH and H group would be too far away to form bonds.1.Can somebody explain me why alternate Beta glucose molecules need to flip during the formation of cellulose?
2.is it NADP or NADPH required by nitrogenase enzyme ?
3. why does nitrogenase require ATP, during nitrogen fixation? are enzyme catalysed reactions energy requiring?
Reduced NADP is required as far as I know.
Undoubtedly, even catalysed reactions require activation energy. In fact allreactions have activation energy, just that some reactions can take sufficient amounts from room temperature.
Remember that making the inert nitrogen into reactive NH4+ is obviously gonna require energy to be put into the reaction, like all other endothermic reactions where products have more energy in them than reactants (like photosynthesis)