Consider the following statements: I. Plant cells have fewer mitochondria than animal cells. II. Plastids in a plant cell are the organelles enclosed by a single membrane. III. The Golgi complex in a cell participates in the recycling of plasma membrane. Which of these statements are correct?

Statement I is correct; plant cells generally have fewer mitochondria than animal cells because plants rely on chloroplasts for energy production and are less metabolically active than mobile animals. Statement II is incorrect; plastids, including chloroplasts, are double-membrane-bound organelles [t7]. Chloroplasts specifically possess an outer membrane, an inner membrane, and internal thylakoid stacks [t7]. Statement III is correct; the Golgi complex (specifically the trans-Golgi network) is a central hub in the endocytic pathway [t2]. It participates in the recycling of plasma membrane proteins and lipids that have been internalized via endocytosis, sorting them to be returned to the cell surface or sent for degradation [t2][t3]. This membrane trafficking is essential for maintaining the plasma membrane's composition and surface area [t2][t10]. Therefore, statements I and III are correct.

Sources

1. [1] https://www.nature.com/scitable/topicpage/endosomes-in-plants-14404958/
2. [2] https://www.sciencedirect.com/science/article/abs/pii/B9780126569766501554