Test: Photosynthesis

5 Questions MCQ Test Biology Class 11 | Test: Photosynthesis

This mock test of Test: Photosynthesis for NEET helps you for every NEET entrance exam. This contains 5 Multiple Choice Questions for NEET Test: Photosynthesis (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Photosynthesis quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Test: Photosynthesis exercise for a better result in the exam. You can find other Test: Photosynthesis extra questions, long questions & short questions for NEET on EduRev as well by searching above.

Photosynthetically active radiation (PAR) represents which of the following range of wavelength?

  • Photosynthetically Active Radiation (PAR) of solar radiation is a visible region.
  • It consists of radiations having wavelength between 400 to 700 nm.
  • Green plants use this wavelength in the process of manufacture food, i.e. photosynthesis.

Who described the first action spectrum for photosynthesis?

  • Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of oxygen evolution. 
  • He observed that bacteria mainly accumulated in the region of blue and red light of the split spectrum, thus giving the first action spectrum of photosynthesis.

In the half-leaf experiment of photosynthesis, KOH solution is used because​:


KOH (Potassium Hydroxide) absorbs carbon dioxide. The leaf inside the bottle containing KOH solution does not become blue-black when compared with the leaf which is exposed to atmospheric air. This shows that carbon dioxide is necessary for photosynthesis.


Who demonstrated the importance of sunlight for the process of photosynthesis?

  • Jan Ingenhousz is best known for his discovery of photosynthesis, the process by which green plants absorb carbon dioxide in the presence of sunlight and release oxygen.
  • Through an ingenious series of experiments, Ingenhousz proved that plant leaves need sunlight rather than heat in order to produce oxygen.

In the overall process of photosynthesis, the total number of CO2, water, sugar and O2 molecules utilised and produced is​:


(Total molecules utilized are 18 and produced are 13. Therefore total is 31) 

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