+20 Questions on Photosynthesis

 +20 Questions on Photosynthesis

20 multiple choice questions on Photosynthesis, each numbered and followed by an answer key at the end.

 Multiple Choice Questions: Photosynthesis

    1. What is the primary purpose of photosynthesis?

A) To release oxygen into the air

B) To produce glucose for energy

C) To absorb carbon dioxide

D) To store chlorophyll in plants

Ads

    2. Which organelle carries out photosynthesis?

A) Mitochondrion

B) Chloroplast

C) Ribosome

D) Nucleus

    3. Which pigment is responsible for capturing light energy?

A) Carotene

B) Melanin

C) Chlorophyll

D) Xanthophyll

    4. What gas is taken in during photosynthesis?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

    5. What are the end products of photosynthesis?

A) Carbon dioxide and water

B) Glucose and oxygen

C) Oxygen and nitrogen

D) Glucose and carbon dioxide

    6. In which part of the plant does most photosynthesis occur?

A) Roots

B) Stems

C) Flowers

D) Leaves

    7. The process of photosynthesis primarily uses energy from:

A) Chemical bonds

B) Heat

C) The Sun

D) Electricity

    8. The overall equation for photosynthesis is:

A) O₂ + H₂O → C₆H₁₂O₆ + CO₂

B) C₆H₁₂O₆ + O₂ → CO₂ + H₂O

C) CO₂ + H₂O → C₆H₁₂O₆ + O₂

D) CO₂ + O₂ → C₆H₁₂O₆ + H₂O

    9. What is the role of water in photosynthesis?

A) It provides carbon

B) It releases oxygen

C) It produces chlorophyll

D) It stores energy

    10. What happens to the oxygen produced in photosynthesis?

A) It is absorbed by the plant

B) It is used to make glucose

C) It is released into the atmosphere

D) It is converted to carbon dioxide

    11. Which part of the chloroplast contains chlorophyll?

A) Outer membrane

B) Inner membrane

C) Thylakoid membrane

D) Stroma

    12. What is the name of the light-independent stage of photosynthesis?

A) Glycolysis

B) Calvin Cycle

C) Krebs Cycle

D) Citric Acid Cycle

    13. When does the light-dependent stage of photosynthesis occur?

A) At night

B) During the day

C) Only during winter

D) During cellular respiration

    14. Which molecule is fixed during the Calvin Cycle?

A) Oxygen

B) Water

C) Carbon dioxide

D) ATP

    15. Where does the Calvin Cycle take place?

A) Thylakoid

B) Cytoplasm

C) Stroma

D) Mitochondria

    16. Which of the following is not needed for photosynthesis?

A) Carbon dioxide

B) Light

C) Oxygen

D) Water

    17. What is the first step of the light-dependent reaction?

A) Glucose production

B) Water splitting

C) Carbon fixation

D) Oxygen absorption

    18. ATP and NADPH are used in which part of photosynthesis?

A) Light-dependent reactions

B) Calvin Cycle

C) Glycolysis

D) Krebs Cycle

    19. What happens to glucose produced during photosynthesis?

A) It is excreted

B) It is converted to proteins

C) It is used for energy or stored as starch

D) It is destroyed

    20. Which color of light is least effective for photosynthesis?

A) Red

B) Blue

C) Green

D) Violet

+20 Questions on Photosynthesis


 Answer Key

    1. B – To produce glucose for energy

    2. B – Chloroplast

    3. C – Chlorophyll

    4. B – Carbon dioxide

    5. B – Glucose and oxygen

    6. D – Leaves

    7. C – The Sun

    8. C – CO₂ + H₂O → C₆H₁₂O₆ + O₂

    9. B – It releases oxygen

    10. C – It is released into the atmosphere

    11. C – Thylakoid membrane

    12. B – Calvin Cycle

    13. B – During the day

    14. C – Carbon dioxide

    15. C – Stroma

    16. C – Oxygen

    17. B – Water splitting

    18. B – Calvin Cycle

    19. C – It is used for energy or stored as starch

    20. C – Green


Dive into the groundbreaking science of neurotransmitters—your brain’s invisible architects—in Chemical Harmony: How Neurotransmitters Shape Our Lives (2025). This meticulously researched book reveals how serotonin, dopamine, GABA, and other brain chemicals silently orchestrate every aspect of your existence, from decision-making and relationships to mental health and emotional resilience.Click here to buy


👉 +3000 Biology Questions with Answers Key.


Ads

compartilhe compartilhe

Share Online!


Ronaldo Silva: Professor and Specialist in Science Teaching, from UFF/RJ, with more than 25 years of experience in teaching.

 
About | Terms | Cookies Policy | Privacy Policy

Chemical, biology, physics in biology, biophysics, molecular science, interdisciplinary research

For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. — John 3:16 (NIV)