If i do a starch test on a plant cell that comes from a plant exposed to sunlight, which parts of the plant cell will be stained blueblack?

Question

1. nucleus
2. cell wall
3. cytoplasm
4. vacuole

I wrote the answer as 4, the vacuole, but the correct answer says 3, the cytoplasm. Shouldn't the vacuole contain the cell sap??

Answer 1

sorry! There's a mistake.

the four choices are:

1. nucleus
2. cell wall
3. chloroplast
4. vacuole

So which one is the correct option?

Answer 2

2.cell wall