Question Constellation Sign up for free AQA · GCSE · Biology · Higher
Variegated Leaf Starch Results
In another investigation the student used a different type of plant. The plant was left uncovered in the light for 48 hours. After 48 hours the student tested a leaf from the plant for starch. Figure 6 shows the leaf before it was tested for starch.
| Part of leaf tested | Result after 48 hours |
|---|---|
| Green | |
| White |
Complete Table 4 to show the results you would expect for the starch test on the leaf in Figure 6.
Practice unavailable
This question can be viewed, but its original response format is not available for practice yet.
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 Gives both required, correctly paired starch-test results for the Green and White rows.
Full-mark answer
Green: starch present (a positive blue-black result). White: no starch present (a negative yellow/orange/brown result).
Why this answer loses marks
Both parts of the leaf will give the same result.
This ignores the regions' different chlorophyll status, so their starch-test predictions must be derived separately.