During the development of the mammalian eye lens, differentiating lens fiber cells undergo programmed organelle degradation, losing their nuclei, endoplasmic reticulum, and mitochondria to form an organelle-free zone (OFZ). This adaptation is crucial for ensuring optical clarity and minimizing light scattering.
Which statement correctly describes respiration in the mature lens fiber cells of the OFZ?
They respire anaerobically via glycolysis in the cytoplasm because they lack the mitochondria required for the Link reaction, Krebs cycle, and oxidative phosphorylation.
They perform aerobic respiration using oxygen from the aqueous humor, as the enzymes for the Krebs cycle and oxidative phosphorylation are relocated to the cytoplasm.
They do not carry out any respiration or metabolic processes because they lack a nucleus to regulate metabolic pathways and synthesize ATP.
They generate ATP by coupling glycolysis to an electron transport chain located on their outer plasma membrane.
