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: -Answer and Explanation: The false statement is B: chloroplasts are indeed related to plastids. Chloroplasts are a form of plastids, found in plant cells and certain algae, with the function of carrying out photosynthesis.

Detailed explanation-3: -Chloroplasts have two main membranes, an outer membrane and an inner membrane. Beyond the inner membrane is a fluid called the stroma, and in the stroma are many more membranous structures called thylakoids.

Detailed explanation-4: -In higher plants, photosynthesis occurs within chloroplasts that are membrane-bound large (5–10 m diameter) organelles found in the cytosol of leaf cells in apposition to the cytoplasmic and tonoplastic membranes.

Detailed explanation-5: -Chloroplasts are not responsible for the colour of leaves.