In plant cells

In plant cells, which are eukaryotic, both the nucleus and chloroplasts are membrane-bound organelles. The nucleus is encased in a nuclear envelope, a double-membrane structure consisting of two phospholipid bilayers that separate the genetic material from the cytoplasm. Similarly, chloroplasts are large organelles bounded by their own double membrane known as the chloroplast envelope [3]. This envelope consists of an inner and outer membrane that regulates the passage of molecules between the organelle's interior and the cytosol [2]. While prokaryotic cells like bacteria lack a well-defined nuclear membrane, eukaryotic plant cells possess these distinct, membrane-enclosed compartments to facilitate specialized cellular functions such as photosynthesis and DNA management [4]. Therefore, both the nucleus and chloroplasts are surrounded separately by their own specific membranes.

Sources

1. [2] https://www.ncbi.nlm.nih.gov/books/NBK9905/
2. [3] https://pmc.ncbi.nlm.nih.gov/articles/PMC2394710/
3. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 2: The Invisible Living World: Beyond Our Naked Eye > 2.5 Why Is Cell Considered to Be a Basic Unit of Life? > p. 24
4. [4] https://ncert.nic.in/textbook/pdf/kebt102.pdf