Factors affecting photosynthesis — NEET Biology Questions

Practice 10 questions on Factors affecting photosynthesis from Photosynthesis in higher plants (NCERT Class 11, Chapter 11). Free samples below — get all 10 in the app.

10 Questions Photosynthesis in higher plants Class 11

Sample Questions — Factors affecting photosynthesis

Try 5 questions below from Factors affecting photosynthesis. Get all 10 in the MedicNEET app.

MCQ
Who proposed the Law of Limiting Factors?
  • A. Joseph Priestley
  • B. Cornelius van Niel
  • C. Blackman
  • D. Engelmann
✅ Correct Answer: C
F.F. Blackman introduced this principle in 1905.
MCQ
Which internal factor does not directly affect the photosynthetic rate?
  • A. Leaf orientation
  • B. Number of chloroplasts
  • C. Size of the nucleus
  • D. Accumulation of photosynthates
✅ Correct Answer: C
While important for overall cell function, nuclear size isn’t a direct photosynthetic variable.
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MCQ
CO₂ is a major limiting factor in photosynthesis in:
  • A. Desert regions
  • B. Submerged aquatic plants
  • C. Temperate regions
  • D. Tropical greenhouses
✅ Correct Answer: D
In closed environments, CO₂ levels may be too low to support optimal photosynthesis.
MCQ
Which of the following is a law that describes the effect of multiple factors on photosynthesis?
  • A. Blackman's law
  • B. Liebig’s law
  • C. Law of dominance
  • D. Mendel’s second law
✅ Correct Answer: A
Blackman’s Law of Limiting Factors explains that when multiple factors affect a process, the one in minimal supply limits the rate.
MCQ
According to Blackman’s law, when a process is influenced by several factors, the rate is limited by:
  • A. The factor in shortest supply
  • B. The slowest-removing product
  • C. The fastest-acting factor
  • D. Temperature only
✅ Correct Answer: A
The scarcest factor among those required becomes limiting.

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