What is physiology of euglena?

Answer 1

The glyoxylate cycle operates at a high level in Euglena gracilis when acetate is the only carbon source, and at a low level when glucose is the only carbon source, as indicated by activities of malate synthase. Altho glucose causes a moderate repression of some of the enzymes of the glyoxylate cycle, it neither represses nor inhibits malate synthase. The specific activity of the malic enzyme was about 5-fold greater in acetate-grown Euglena than in glucose-grown cells, but the absolute rate of CO2 fixation was about twice as great in cells grown on glucose. The respiratory quotient was unity regardless of substrate.

Answer 2

Euglena is a unicellular organism that exhibits both plant-like and animal-like characteristics. It can perform photosynthesis using chloroplasts to make its own food in the presence of light, and can also absorb nutrients from its environment like an animal. Euglena can also move using a flagellum and has a contractile vacuole to regulate water balance in its cell.