Example 1 · difficulty 1/5
In a typical green leaf, which cells are the principal sites containing chloroplasts for photosynthesis?
- A. Mesophyll cells
- B. Mature sieve-tube elements
- C. Epidermal cells lacking chloroplasts
- D. Xylem vessel elements
2021 source guide · Biology
NEET 2021 Biology Photosynthesis Questions
Use this page to connect the official 2021 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
pigments, light reactions, carbon fixation, photorespiration and limiting factors.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
Which chloroplast compartment-function pairing is correct?
- A. Outer envelope membrane — main site of carbon dioxide reduction
- B. Thylakoid membranes — light reactions; stroma — enzymatic carbon fixation reactions
- C. Thylakoid lumen — main location of starch synthesis from carbon dioxide
- D. Stroma lamellae — storage site containing no photosynthetic machinery
Example 3 · difficulty 2/5
Which description of the internal membrane system of a chloroplast is accurate?
- A. Cristae are stacked to form grana inside chloroplasts.
- B. The chloroplast envelope folds inward to form all grana directly.
- C. Flattened thylakoid sacs form grana, and different grana are connected by stroma lamellae.
- D. The stroma is arranged as membrane-bound discs called grana.
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2021 Biology Photosynthesis PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2021 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.