74. A Plant with variegated plants were allowed for photosynthesis by placing it in light and then brought into dark, then final reserve material of photosynthesis, the starch will accumulate in which part of leaf-
(1) Green portion    (2) Colored portion
(3) In whole leaf     (4) No where

Introduction

Variegated leaves have both green (chlorophyll-rich) and non-green (colored or white, chlorophyll-lacking) areas. Photosynthetic processes, including starch production, depend directly on the presence of chlorophyll. This concept is commonly demonstrated in classic photosynthesis experiments and exam questions.

Explanation of Each Option

(1) Green portion

• Correct. Only the green parts of a variegated leaf contain chlorophyll, the pigment essential for trapping light energy and carrying out photosynthesis. When the plant is exposed to light, photosynthesis occurs, and starch (the final reserve product) accumulates in these green areas.

(2) Colored portion

• Incorrect. The colored or white portions lack chlorophyll, so no photosynthesis or starch synthesis occurs there after light exposure.

(3) In whole leaf

• Incorrect. Starch does not accumulate in areas without chlorophyll, so only part of the leaf will store starch.

(4) Nowhere

• Incorrect. Experimentally, after light exposure, starch is observed in the green portions of the leaf, so the answer cannot be nowhere.

Conclusion

After exposing a variegated (partially green, partially non-green) leaf to light, starch accumulates only in the green areas where chlorophyll enables photosynthesis. This result visually demonstrates the necessity of chlorophyll for starch production and is foundational in plant biology.