AP BIOLOGY

Detailed explanation-1: -Complete answer: Chloroplasts also contain an extensive internal system of interconnected membrane-limited sacs called thylakoids, which are flattened to form disks; these often are grouped in stacks called grana and embedded in a matrix.

Detailed explanation-2: -The interior of the chloroplast is made up of internal membranes organized into flattened sacs called thylakoids and a fluid substance called stroma.

Detailed explanation-3: -Chloroplasts have stacks of internal membranes called thylakoids; these membranes sequence pigments and electron carrier molecules for efficient photosynthesis.

Detailed explanation-4: -chloroplast. In chloroplast: Characteristics of chloroplasts. … presence of closed disks (or thylakoids), is known as the thylakoid membrane. In most higher plants, the thylakoids are arranged in tight stacks called grana (singular granum).

Detailed explanation-5: -The thylakoid membrane is the site of photochemical and electron transport reactions of oxygenic photosynthesis. The lipid composition of the thylakoid membrane, with two galactolipids, one sulfolipid, and one phospholipid, is highly conserved among oxygenic photosynthetic organisms.