What are the three steps outlined in the process of autophagy?

What are the three steps outlined in the process of autophagy?

• A. Initiation, Elongation, Maturation
• B. Activation, Translocation, Degradation
• C. Nucleation, Autophagosome formation, and Fusion with lysosome
• D. Assembly, Packaging, Secretion

Answer: (C)

Macroautophagy unfolds in three main stages: nucleation of the isolation membrane (phagophore), elongation and closure to form the autophagosome, and fusion of that autophagosome with a lysosome to degrade and recycle the cargo. The listed three-step sequence matches this progression: starting a membrane, turning it into a complete autophagosome, then merging with a lysosome to break down the contents. Other term sets mix in stages that aren’t the standard three-step framework or skip the crucial lysosomal fusion, so they don’t align with the autophagy pathway as defined in SAIM material.

Macroautophagy unfolds in three main stages: nucleation of the isolation membrane (phagophore), elongation and closure to form the autophagosome, and fusion of that autophagosome with a lysosome to degrade and recycle the cargo. The listed three-step sequence matches this progression: starting a membrane, turning it into a complete autophagosome, then merging with a lysosome to break down the contents. Other term sets mix in stages that aren’t the standard three-step framework or skip the crucial lysosomal fusion, so they don’t align with the autophagy pathway as defined in SAIM material.