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Friday, 9 October

NEET UG 2017 · Botany · Question 142

NEET 2017 Botany, question 142

Question 142 of the NEET 2017 paper (code A) is a Botany question from Photosynthesis in Higher Plants. Its idea, Light Saturation Points C3 vs C4, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 3.

Updated 2026-10-08

Q142 · Botany

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?

  1. 1Light saturation for CO2\mathrm{CO_2} fixation occurs at 10% of full sunlight
  2. 2Increasing atmospheric CO2\mathrm{CO_2} concentration up to 0.05% can enhance CO2\mathrm{CO_2} fixation rate
  3. 3C3\mathrm{C_3} plants respond to higher temperatures with enhanced photosynthesis while C4\mathrm{C_4} plants have much lower temperature optimumOfficial answer
  4. 4Tomato is a greenhouse crop which can be grown in CO2\mathrm{CO_2} - enriched atmosphere for higher yield

Official answer: option 3 · CBSE official answer key

Same idea

The only question on Light Saturation Points C3 vs C4

No other NEET paper from 2017–2026 tested this exact idea.

Light Saturation Points C3 vs C4: every question and how it was framed

The chapter

Photosynthesis in Higher Plants in ten years of NEET

23 questions from 2017–2026, asked in 9 of 10 papers, about 2.2 a paper. Calvin and Hatch-Slack Cycles alone had 14.

Chapter analysisStudy this chapterPractise this chapter

Photosynthesis in Higher Plants: questions per paper

0362’171’180’192’202’213’223’233’242’255’26