BiologyPhotosynthesiseasy

Photosynthesis Quiz

Practice quiz on Photosynthesis (Biology). 5 real exam questions.

25
Minutes
25
Marks
FREE
Access

About This Quiz

Practice quiz on Photosynthesis (Biology). 5 real exam questions. Photosynthesis Quiz is a free, 25-minute, 25-mark practice quiz on AajExam rated at easy difficulty, designed to help candidates preparing for SSC, UPSC, Banking, Railway and State PSC government competitive exams sharpen their command of Photosynthesis (Biology). Every question on this quiz ships with a detailed step-by-step solution so you don't just learn the right answer — you learn the reasoning and shortcuts top scorers use to crack similar questions faster on the actual exam day. Why Photosynthesis Quiz matters in your preparation: government exam-conducting bodies repeatedly draw questions from the same chapters and the same skill-clusters across recruitment cycles. By attempting focused topic-wise quizzes like this one, you build pattern recognition — the ability to spot which formula, rule or trick applies the moment you see a question. Toppers consistently report that 5-10 quizzes on a single topic delivers more exam-day score gain than 20+ unfocused full-length mocks, because targeted drilling exposes your specific sub-topic weaknesses with surgical precision. How to use this quiz effectively: attempt it in one sitting under the 25-minute timer, without referring to notes or external resources — simulate exam-day conditions exactly. After submission, review the auto-generated analytics to see your accuracy, time per question and section-wise performance. Then go through every wrong and skipped question with the explanation, mentally tagging the underlying concept rather than just memorising the answer. Revisit this quiz after 7-10 days; your second attempt should be 15-20% faster with noticeably better accuracy. Bookmark this page and revisit weekly as we add new quizzes on related topics. AajExam quiz design principles: every quiz on the platform is curated by subject experts using the actual question formats, difficulty distributions and time pressures of the target government exams. We deliberately avoid generic "textbook" questions in favour of exam-replicating ones. Solutions are written in plain English (and Hindi where source material was bilingual), with step-by-step working for quantitative problems, grammar rules for English questions, and direct reference statements for general awareness items. Performance analytics after each attempt include accuracy, attempt rate, time spent per question, and an estimated all-India percentile so you know exactly where you stand against other candidates. This quiz is completely free to attempt. You only need a free AajExam account to track your performance across attempts, view detailed solutions and unlock the platform-wide analytics dashboard. The platform is mobile-friendly and works seamlessly on smartphones, tablets and desktops — so you can sharpen your Photosynthesis (Biology) skills in any spare 15-minute window.

Photosynthesis Quiz — Questions with Solutions

All 25 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.

  1. Q1.Which gas is used by plants for photosynthesis?

    • A.Oxygen
    • B.Nitrogen
    • C.Carbon dioxide
    • D.Hydrogen
    Show answer

    Answer: C. Carbon dioxide

    Plants use CO₂ to make food.

  2. Q2.Which gas do plants release during photosynthesis?

    • A.Oxygen
    • B.Carbon dioxide
    • C.Nitrogen
    • D.Methane
    Show answer

    Answer: A. Oxygen

    Plants release oxygen.

  3. Q3.Which gas is used by plants during photosynthesis?

    • A.Oxygen
    • B.Nitrogen
    • C.Carbon dioxide
    • D.Hydrogen
    Show answer

    Answer: C. Carbon dioxide

    Plants absorb CO₂ to prepare food.

  4. Q4.Which part of the plant conducts photosynthesis?

    • A.Root
    • B.Stem
    • C.Leaf
    • D.Flower
    Show answer

    Answer: C. Leaf

    Leaves contain chlorophyll.

  5. Q5.Which gas is essential for photosynthesis?

    • A.Oxygen
    • B.Carbon dioxide
    • C.Nitrogen
    • D.Hydrogen
    Show answer

    Answer: B. Carbon dioxide

    Plants use CO₂ during photosynthesis.

  6. Q6.Photosynthesis occurs in which cell organelle?

    • A.Mitochondria
    • B.Chloroplast
    • C.Nucleus
    • D.Ribosome
    Show answer

    Answer: B. Chloroplast

    Chloroplasts contain chlorophyll and are the site of photosynthesis.

  7. Q7.Which green pigment is essential for photosynthesis?

    • A.Chlorophyll
    • B.Carotene
    • C.Xanthophyll
    • D.Anthocyanin
    Show answer

    Answer: A. Chlorophyll

    Chlorophyll absorbs light energy for photosynthesis.

  8. Q8.The raw materials required for photosynthesis are:

    • A.Oxygen and glucose
    • B.Carbon dioxide and water
    • C.Nitrogen and water
    • D.Oxygen and water
    Show answer

    Answer: B. Carbon dioxide and water

    Plants use CO2 and water to make glucose during photosynthesis.

  9. Q9.The by-product released during photosynthesis is:

    • A.Carbon dioxide
    • B.Oxygen
    • C.Nitrogen
    • D.Hydrogen
    Show answer

    Answer: B. Oxygen

    Oxygen is released as a by-product of photosynthesis.

  10. Q10.Photosynthesis converts light energy into:

    • A.Heat energy
    • B.Chemical energy
    • C.Mechanical energy
    • D.Sound energy
    Show answer

    Answer: B. Chemical energy

    Light energy is converted into chemical energy stored in glucose.

  11. Q11.The light-dependent reactions of photosynthesis occur in the:

    • A.Stroma
    • B.Thylakoid membrane
    • C.Mitochondrial matrix
    • D.Nucleus
    Show answer

    Answer: B. Thylakoid membrane

    Light reactions occur on the thylakoid membrane of the chloroplast.

  12. Q12.The dark reaction (Calvin cycle) of photosynthesis occurs in the:

    • A.Thylakoid
    • B.Stroma
    • C.Cytoplasm
    • D.Nucleus
    Show answer

    Answer: B. Stroma

    The Calvin cycle takes place in the stroma of the chloroplast.

  13. Q13.Which gas is essential as an input for photosynthesis?

    • A.Nitrogen
    • B.Carbon dioxide
    • C.Hydrogen
    • D.Oxygen
    Show answer

    Answer: B. Carbon dioxide

    Carbon dioxide is used to synthesize glucose.

  14. Q14.The main end product of photosynthesis is:

    • A.Glucose
    • B.Protein
    • C.Fat
    • D.Starch only
    Show answer

    Answer: A. Glucose

    Glucose is the primary product of photosynthesis.

  15. Q15.Photosynthesis mainly occurs in which part of the plant?

    • A.Roots
    • B.Stem
    • C.Leaves
    • D.Flowers
    Show answer

    Answer: C. Leaves

    Leaves contain the most chloroplasts and are the main site of photosynthesis.

  16. Q16.The primary source of energy for photosynthesis is:

    • A.Sunlight
    • B.Soil nutrients
    • C.Water pressure
    • D.Wind
    Show answer

    Answer: A. Sunlight

    Sunlight provides the energy for photosynthesis.

  17. Q17.Stomata on leaves are mainly responsible for:

    • A.Gaseous exchange
    • B.Water absorption
    • C.Food storage
    • D.Reproduction
    Show answer

    Answer: A. Gaseous exchange

    Stomata allow exchange of CO2 and O2.

  18. Q18.C3 and C4 are types of:

    • A.Plant hormones
    • B.Photosynthetic pathways
    • C.Types of chlorophyll
    • D.Types of roots
    Show answer

    Answer: B. Photosynthetic pathways

    C3 and C4 refer to different carbon-fixation pathways in photosynthesis.

  19. Q19.The Calvin cycle, a key part of photosynthesis, was discovered by:

    • A.Melvin Calvin
    • B.Charles Darwin
    • C.Gregor Mendel
    • D.Robert Hooke
    Show answer

    Answer: A. Melvin Calvin

    Melvin Calvin discovered the Calvin cycle and won the Nobel Prize for it.

  20. Q20.The overall photosynthesis reaction produces glucose and:

    • A.Oxygen
    • B.Nitrogen
    • C.Carbon monoxide
    • D.Ozone
    Show answer

    Answer: A. Oxygen

    6CO2 + 6H2O -> C6H12O6 + 6O2.

  21. Q21.In photosynthesis, water molecules are split during a process called:

    • A.Photolysis
    • B.Hydrolysis
    • C.Glycolysis
    • D.Electrolysis
    Show answer

    Answer: A. Photolysis

    Photolysis is the light-driven splitting of water.

  22. Q22.Which wavelengths of light are most effective for photosynthesis?

    • A.Green light
    • B.Red and blue light
    • C.Yellow light
    • D.Ultraviolet light
    Show answer

    Answer: B. Red and blue light

    Chlorophyll absorbs red and blue light most efficiently.

  23. Q23.CAM photosynthesis is typically found in plants adapted to:

    • A.Deserts
    • B.Wetlands
    • C.Forests
    • D.Grasslands
    Show answer

    Answer: A. Deserts

    CAM plants like cacti conserve water by fixing CO2 at night, suited to deserts.

  24. Q24.Which of these is NOT required as an input for photosynthesis?

    • A.Sunlight
    • B.Water
    • C.Carbon dioxide
    • D.Oxygen
    Show answer

    Answer: D. Oxygen

    Oxygen is a product of photosynthesis, not a required input.

  25. Q25.Photosynthesis broadly occurs in two stages known as:

    • A.Light reaction and dark reaction
    • B.Inhalation and exhalation
    • C.Absorption and secretion
    • D.Diffusion and osmosis
    Show answer

    Answer: A. Light reaction and dark reaction

    The two stages are the light-dependent reactions and the light-independent (dark/Calvin) reactions.

Loading quiz preview…

Frequently Asked Questions

Is Photosynthesis Quiz free to attempt on AajExam?

Yes. Photosynthesis Quiz is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.

How long does it take to complete Photosynthesis Quiz?

Photosynthesis Quiz runs on a 25-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.

Are detailed solutions provided?

Yes. Every question on Photosynthesis Quiz ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.

Can I attempt Photosynthesis Quiz multiple times?

Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.

Which government exams does this quiz prepare me for?

Photosynthesis questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.