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Grade 12 Photosynthesis & Respiration Worksheet with Answers

Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Biology

Unit 1: Cells & EnergyCell ProcessesNGSS HS-LS1-5

Photosynthesis and cellular respiration: their inputs, outputs and where each takes place in the cell. This free high school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Photosynthesis & Respiration

Grade 12 · Biology

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Name

Class

Date

Learning goal: Cell Processes · NGSS HS-LS1-5

Directions: This worksheet has 3 parts. Read the instructions at the start of each part.

Example

What gas do plants release as a byproduct of photosynthesis?

Answer: oxygen

Part A

Label the diagram. Use the words in the box.

Word bank

sunlightwatercarbon dioxideoxygen
glucose1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Match each clue to the right word. Write the letter in the box.

  1. 5What energy-carrying molecule does cellular respiration produce?
  2. 6What pigment captures light energy for photosynthesis?
  3. 7What gas do plants take in for photosynthesis?
  4. 8What sugar is made during photosynthesis?
  5. 9What is produced by anaerobic respiration in human muscles?
  • AATP
  • BLactic acid
  • CCarbon dioxide
  • DGlucose
  • EChlorophyll
Part C

Answer each question. Use full sentences where you can.

  1. 10

    Write the balanced chemical equation for photosynthesis.

  2. 11

    Write the general word equation for aerobic respiration.

  3. 12

    Write the balanced chemical equation for aerobic respiration.

  4. 13

    Do plants carry out cellular respiration as well as photosynthesis?

  5. 14

    Write the general word equation for photosynthesis.

  6. 15

    What are the two stages of photosynthesis?

  7. 16

    Name two factors that can limit the rate of photosynthesis.

★ Challenge corner for fast finishers

Why do you see lightning before you hear thunder?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/biology/12/bio_photosynthesis_respiration

Answer key (click to show)
  1. 1.sunlight
  2. 2.carbon dioxide
  3. 3.oxygen
  4. 4.water
  5. 5.A — ATP
  6. 6.E — chlorophyll
  7. 7.C — carbon dioxide
  8. 8.D — glucose
  9. 9.B — lactic acid (and a little ATP)
  10. 10.6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (light energy)
  11. 11.glucose + oxygen → carbon dioxide + water (+ energy)
  12. 12.C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O (+ ATP)
  13. 13.yes, all living cells respire
  14. 14.carbon dioxide + water (+ light) → glucose + oxygen
  15. 15.the light-dependent reactions and the Calvin cycle (light-independent reactions)
  16. 16.light intensity, carbon dioxide concentration or temperature (any two)
  17. ★light travels much faster than sound (challenge corner)

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