AP BIOLOGY

Detailed explanation-1: -Plant chloroplasts are large organelles (5 to 10 m long) that, like mitochondria, are bounded by a double membrane called the chloroplast envelope (Figure 10.13). In addition to the inner and outer membranes of the envelope, chloroplasts have a third internal membrane system, called the thylakoid membrane.

Detailed explanation-2: -Chloroplasts are cell organelles covered by a double membrane. Other cell organelles covered by a double membrane are nucleus and mitochondria.

Detailed explanation-3: -Double membrane-bound organelles: Nucleus, mitochondria and chloroplast are double membrane-bound organelles present only in a eukaryotic cell.

Detailed explanation-4: -Besides the nucleus, two other organelles-the mitochondrion and the chloroplast-play an especially important role in eukaryotic cells. These specialized structures are enclosed by double membranes, and they are believed to have originated back when all living things on Earth were single-celled organisms.

Detailed explanation-5: -B: The Golgi complex, sometimes called the Golgi apparatus, only has a single membrane surrounding the organelle.