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Photosynthesis: Light and Dark Reactions - Problem Set

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This problem set is designed to provide systematic and comprehensive practice on the light and dark reactions of photosynthesis. It is suitable for Class 11–12 students, NEET aspirants, and undergraduate learners who want to strengthen their understanding through structured problem-solving.

In this section, you will practice:

  • Concept-based questions covering light and dark reactions

  • Multiple-choice questions aligned with NCERT and competitive exam patterns

  • Assertion–reason and multi-statement problems

  • Numerical and calculation-based questions

  • Diagram-based and sequence-arrangement problems

  • Application-oriented and case-based questions

  • Mixed-difficulty problems ranging from basic to advanced levels

The problem set is structured to support gradual skill development, improve accuracy and confidence, and help students evaluate their preparation for school examinations, NEET, and undergraduate assessments.

Strengthen your mastery of photosynthesis by practicing a wide range of problems focused on light and dark reactions.

Q. During which phase of photosynthesis is carbon dioxide utilized?
  • A. Light reactions
  • B. Calvin cycle
  • C. Photorespiration
  • D. Electron transport chain
Q. In which phase of photosynthesis is glucose synthesized?
  • A. Light reactions
  • B. Calvin cycle
  • C. Photorespiration
  • D. Electron transport chain
Q. What is the function of RuBisCO in the Calvin cycle?
  • A. To produce ATP
  • B. To fix carbon dioxide
  • C. To generate NADPH
  • D. To release oxygen
Q. What is the main function of the light-harvesting complexes?
  • A. To transport electrons
  • B. To absorb and transfer light energy
  • C. To fix carbon
  • D. To produce glucose
Q. What is the main function of the RuBisCO enzyme in photosynthesis?
  • A. To produce ATP
  • B. To fix carbon dioxide
  • C. To split water
  • D. To generate NADPH
Q. What is the main purpose of the light reactions in photosynthesis?
  • A. To produce glucose
  • B. To convert solar energy into chemical energy
  • C. To release carbon dioxide
  • D. To synthesize chlorophyll
Q. What is the role of ATP synthase in photosynthesis?
  • A. To absorb light
  • B. To fix carbon
  • C. To synthesize ATP
  • D. To transport electrons
Q. What role does water play in the light reactions?
  • A. It absorbs light
  • B. It provides electrons
  • C. It fixes carbon
  • D. It produces glucose
Q. Which of the following statements about the light reactions is true?
  • A. They occur in the stroma
  • B. They do not require light
  • C. They produce ATP and NADPH
  • D. They fix carbon dioxide
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