AP BIOLOGY

Detailed explanation-1: -The stroma is the fluid portion of the chloroplast located outside the thylakoids. 6. The visible light absorbed by chlorophyll increases the energy level of the chlorophyll’s electrons.

Detailed explanation-2: -The membrane of each thylakoid contains green-colored pigments called chlorophylls that absorb light. The fluid-filled space around the grana is called the stroma, and the space inside the thylakoid discs is known as the thylakoid space. Different chemical reactions occur in the different parts of the chloroplast.

Detailed explanation-3: -Stroma is the fluid-filled internal space of the chloroplasts which encircle the grana and the thylakoids. It contains chloroplast DNA, starch and ribosomes along with enzymes needed for the Calvin cycle.

Detailed explanation-4: -Complete answer: The grana and stroma are present inside the cell organelle chloroplast. It is a type of plastid. It is a double membraned cell organelle.