Question

What is the function of Heterocysts?

Answer 1

Heterocysts:

1. Heterocysts is a thick wall cells found in cyanobacteria (Blue-green algae).
2. The cell is present in an algae filament where nitrogen fixation takes place.
3. For example, Nostoc.

The function of Heterocyst:

1. They produce nitrogenase which is the main enzyme in nitrogen fixation.
2. It produces an additional cell wall that acts as a barrier for oxygen and helps in creating a micro anaerobic environment.
3. They degrade photosynthesis II, which produces oxygen.
4. The up-regulate glycolytic enzymes.
5. It contains polar plugs composed of cyanophycin which slows down cell-to-cell diffusion.