Light Requirement for Photosynthesis — NEET Biology
📚 Practice ConceptYou may have carried out the experiment to look for starch formation in two leaves – a variegated leaf or a leaf that was partially covered with black paper, and exposed to light. On testing these leaves for the presence of starch it was clear that photosynthesis occurred only in the green parts of the leaves in the presence of light.
Assertion (A): Presence of light is essential for starch formation in leaves. Reason (R): Light triggers protein synthesis in guard cells.
View solution & NCERT explanation
Correct answer: C — A is true but R is false
Light is required for photosynthesis and starch formation, but protein synthesis in guard cells is irrelevant here.
What does NCERT say about You may have carried?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.