Short answerHard1 mark
2(b)
Mention the exact location of the following:
Thylakoids
Topic: Location of thylakoids
Previous-year question practice database
Answer
Exam answer
Thylakoids are the flattened disc-like membranous sacs found INSIDE the CHLOROPLAST, stacked one above another to form the GRANA.
Explanation
Be precise: thylakoids are inside the chloroplast, and stacks of them make the grana.
WHY THE STACKING MATTERS: the thylakoid membranes hold the CHLOROPHYLL, and piling them into discs packs an enormous membrane area into a small volume — which maximises the light that can be absorbed.
THE DIVISION OF LABOUR inside one organelle: GRANA (thylakoids) — the LIGHT reaction; chlorophyll, photolysis, ATP and NADPH₂ STROMA — the DARK reaction; carbon dioxide fixed into glucose