Review worksheet on photosynthesis and cellular respiration featuring true/false questions and answers.
Photosynthesis and Cellular Respiration Review Worksheet with True/False questions and answers.
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Step-by-step solution for: Photosynthesis and Cellular Respiration Review KEY | Download Free ...
The image you've uploaded is a "Photosynthesis and Cellular Respiration Review Worksheet" with a True or False section (Part I) and some fill-in-the-blank answers at the bottom. Let's go through each statement, explain why it's marked True or False, and clarify any misconceptions.
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1. TRUE – *All life needs energy.*
→ All living organisms require energy to carry out life processes like growth, movement, reproduction, etc.
2. FALSE – *C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O is the chemical reaction of photosynthesis.*
→ This is actually the equation for cellular respiration, not photosynthesis.
✔ Correct photosynthesis equation:
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
3. TRUE – *ATP is the "energy currency" of the cell.*
→ ATP (adenosine triphosphate) stores and transfers energy within cells.
4. TRUE – *Whereas photosynthesis occurs in only some organisms, cellular respiration occurs in the cells of all living things.*
→ Only autotrophs (like plants) perform photosynthesis. All organisms use cellular respiration to produce ATP.
5. FALSE – *Because you are able to cook your own food in the microwave oven, you are a producer.*
→ Cooking food does not make you a producer. Producers (autotrophs) make their own food via photosynthesis or chemosynthesis. Humans are consumers.
6. TRUE – *Autotrophs are producers.*
→ Autotrophs (e.g., plants) make their own food; they are producers in ecosystems.
7. TRUE – *Photosynthesis provides almost all of the energy used by living things on Earth.*
→ Most energy enters ecosystems via sunlight captured by photosynthetic organisms.
8. TRUE – *Earth’s oxygen comes from photosynthesis.*
→ The majority of atmospheric oxygen is produced by photosynthesis in plants, algae, and cyanobacteria.
9. FALSE – *All cells have chloroplasts.*
→ Only plant cells and some protists have chloroplasts. Animal and fungal cells do not.
10. TRUE – *Cellular respiration occurs in the mitochondria.*
→ In eukaryotic cells, most aerobic respiration happens in mitochondria.
11. TRUE – *Mitochondria have their own DNA and ribosomes.*
→ Mitochondria are semi-autonomous organelles with their own genetic material (supporting endosymbiotic theory).
12. TRUE – *Whereas plants perform photosynthesis, plants and animals perform cellular respiration.*
→ Plants do both, but animals only perform cellular respiration.
13. FALSE – *Fermentation is the process of making ATP in the presence of oxygen.*
→ Fermentation occurs in the absence of oxygen (anaerobic conditions).
✔ Aerobic respiration requires oxygen.
14. TRUE – *Anaerobic respiration lets organisms live in places where there is little or no oxygen.*
→ Anaerobic respiration (including fermentation) allows survival without oxygen.
15. TRUE – *Alcoholic fermentation explains why bread dough rises.*
→ Yeast performs alcoholic fermentation, producing carbon dioxide gas, which causes dough to rise.
16. FALSE – *Alcoholic fermentation explains why your muscles are sore after intense exercise.*
→ Muscle soreness is due to lactic acid fermentation, not alcoholic fermentation.
✔ Lactic acid builds up in muscles during anaerobic respiration in humans.
17. TRUE – *Most living things use glucose to make ATP from oxygen.*
→ Glucose is the primary fuel for aerobic respiration in most organisms.
18. TRUE – *Cucumbers become pickles because of alcoholic fermentation.*
→ Actually, this is partially incorrect. Pickling involves lactic acid fermentation by bacteria (like *Lactobacillus*), not alcoholic fermentation.
✘ So this should be FALSE, but the worksheet says TRUE.
→ Correction: Cucumbers become pickles due to lactic acid fermentation, not alcoholic.
19. FALSE – *Anaerobic respiration produces much more ATP than aerobic respiration.*
→ Aerobic respiration produces much more ATP (~36 ATP per glucose) than anaerobic respiration (~2 ATP).
✔ Anaerobic respiration produces less ATP.
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There are two errors in the provided answers:
- #18: Should be FALSE — Pickling is due to lactic acid fermentation, not alcoholic.
- #19: Correctly marked as FALSE — Anaerobic respiration produces less ATP.
But the worksheet says:
> 18 – TRUE
> 19 – FALSE
So #18 is incorrectly marked.
---
These seem to be hints for correcting the false statements:
- 2 – cellular respiration → Because #2 is false, the correct process is cellular respiration
- 5 – consumer → You're a consumer, not a producer
- 9 – plant → Chloroplasts are found in plants (not all cells)
- 13 – absence → Fermentation occurs in the absence of oxygen
- 16 – lactic acid → Muscles get sore due to lactic acid buildup
- 19 – less → Anaerobic respiration produces less ATP
✔ These corrections align perfectly with the explanations above.
---
| Statement | Correct Answer | Explanation |
|---------|----------------|-----------|
| 1 | TRUE | All organisms need energy |
| 2 | FALSE | That's cellular respiration, not photosynthesis |
| 3 | TRUE | ATP is the energy molecule |
| 4 | TRUE | Photosynthesis = some; respiration = all |
| 5 | FALSE | Cooking ≠ being a producer |
| 6 | TRUE | Autotrophs = producers |
| 7 | TRUE | Sunlight → photosynthesis → energy source |
| 8 | TRUE | Oxygen from photosynthesis |
| 9 | FALSE | Only plants/algae have chloroplasts |
| 10 | TRUE | Mitochondria = site of respiration |
| 11 | TRUE | Mitochondria have their own DNA |
| 12 | TRUE | Both plants and animals respire |
| 13 | FALSE | Fermentation = no oxygen |
| 14 | TRUE | Anaerobic respiration works without O₂ |
| 15 | TRUE | CO₂ from yeast fermentation makes dough rise |
| 16 | FALSE | Lactic acid, not alcohol, causes soreness |
| 17 | TRUE | Glucose + O₂ → ATP |
| 18 | FALSE (but marked TRUE) | Pickling = lactic acid fermentation |
| 19 | FALSE | Aerobic respiration makes more ATP |
---
The worksheet is mostly correct, but statement #18 is incorrectly marked as TRUE. It should be FALSE because cucumbers become pickles due to lactic acid fermentation, not alcoholic fermentation.
Let me know if you'd like a corrected version of the worksheet!
---
✔ Part I: True or False – Answers & Explanations
1. TRUE – *All life needs energy.*
→ All living organisms require energy to carry out life processes like growth, movement, reproduction, etc.
2. FALSE – *C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O is the chemical reaction of photosynthesis.*
→ This is actually the equation for cellular respiration, not photosynthesis.
✔ Correct photosynthesis equation:
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
3. TRUE – *ATP is the "energy currency" of the cell.*
→ ATP (adenosine triphosphate) stores and transfers energy within cells.
4. TRUE – *Whereas photosynthesis occurs in only some organisms, cellular respiration occurs in the cells of all living things.*
→ Only autotrophs (like plants) perform photosynthesis. All organisms use cellular respiration to produce ATP.
5. FALSE – *Because you are able to cook your own food in the microwave oven, you are a producer.*
→ Cooking food does not make you a producer. Producers (autotrophs) make their own food via photosynthesis or chemosynthesis. Humans are consumers.
6. TRUE – *Autotrophs are producers.*
→ Autotrophs (e.g., plants) make their own food; they are producers in ecosystems.
7. TRUE – *Photosynthesis provides almost all of the energy used by living things on Earth.*
→ Most energy enters ecosystems via sunlight captured by photosynthetic organisms.
8. TRUE – *Earth’s oxygen comes from photosynthesis.*
→ The majority of atmospheric oxygen is produced by photosynthesis in plants, algae, and cyanobacteria.
9. FALSE – *All cells have chloroplasts.*
→ Only plant cells and some protists have chloroplasts. Animal and fungal cells do not.
10. TRUE – *Cellular respiration occurs in the mitochondria.*
→ In eukaryotic cells, most aerobic respiration happens in mitochondria.
11. TRUE – *Mitochondria have their own DNA and ribosomes.*
→ Mitochondria are semi-autonomous organelles with their own genetic material (supporting endosymbiotic theory).
12. TRUE – *Whereas plants perform photosynthesis, plants and animals perform cellular respiration.*
→ Plants do both, but animals only perform cellular respiration.
13. FALSE – *Fermentation is the process of making ATP in the presence of oxygen.*
→ Fermentation occurs in the absence of oxygen (anaerobic conditions).
✔ Aerobic respiration requires oxygen.
14. TRUE – *Anaerobic respiration lets organisms live in places where there is little or no oxygen.*
→ Anaerobic respiration (including fermentation) allows survival without oxygen.
15. TRUE – *Alcoholic fermentation explains why bread dough rises.*
→ Yeast performs alcoholic fermentation, producing carbon dioxide gas, which causes dough to rise.
16. FALSE – *Alcoholic fermentation explains why your muscles are sore after intense exercise.*
→ Muscle soreness is due to lactic acid fermentation, not alcoholic fermentation.
✔ Lactic acid builds up in muscles during anaerobic respiration in humans.
17. TRUE – *Most living things use glucose to make ATP from oxygen.*
→ Glucose is the primary fuel for aerobic respiration in most organisms.
18. TRUE – *Cucumbers become pickles because of alcoholic fermentation.*
→ Actually, this is partially incorrect. Pickling involves lactic acid fermentation by bacteria (like *Lactobacillus*), not alcoholic fermentation.
✘ So this should be FALSE, but the worksheet says TRUE.
→ Correction: Cucumbers become pickles due to lactic acid fermentation, not alcoholic.
19. FALSE – *Anaerobic respiration produces much more ATP than aerobic respiration.*
→ Aerobic respiration produces much more ATP (~36 ATP per glucose) than anaerobic respiration (~2 ATP).
✔ Anaerobic respiration produces less ATP.
---
🔍 Corrections to the Worksheet
There are two errors in the provided answers:
- #18: Should be FALSE — Pickling is due to lactic acid fermentation, not alcoholic.
- #19: Correctly marked as FALSE — Anaerobic respiration produces less ATP.
But the worksheet says:
> 18 – TRUE
> 19 – FALSE
So #18 is incorrectly marked.
---
🧩 Fill-in-the-Blanks at the Bottom
These seem to be hints for correcting the false statements:
- 2 – cellular respiration → Because #2 is false, the correct process is cellular respiration
- 5 – consumer → You're a consumer, not a producer
- 9 – plant → Chloroplasts are found in plants (not all cells)
- 13 – absence → Fermentation occurs in the absence of oxygen
- 16 – lactic acid → Muscles get sore due to lactic acid buildup
- 19 – less → Anaerobic respiration produces less ATP
✔ These corrections align perfectly with the explanations above.
---
✔ Final Summary
| Statement | Correct Answer | Explanation |
|---------|----------------|-----------|
| 1 | TRUE | All organisms need energy |
| 2 | FALSE | That's cellular respiration, not photosynthesis |
| 3 | TRUE | ATP is the energy molecule |
| 4 | TRUE | Photosynthesis = some; respiration = all |
| 5 | FALSE | Cooking ≠ being a producer |
| 6 | TRUE | Autotrophs = producers |
| 7 | TRUE | Sunlight → photosynthesis → energy source |
| 8 | TRUE | Oxygen from photosynthesis |
| 9 | FALSE | Only plants/algae have chloroplasts |
| 10 | TRUE | Mitochondria = site of respiration |
| 11 | TRUE | Mitochondria have their own DNA |
| 12 | TRUE | Both plants and animals respire |
| 13 | FALSE | Fermentation = no oxygen |
| 14 | TRUE | Anaerobic respiration works without O₂ |
| 15 | TRUE | CO₂ from yeast fermentation makes dough rise |
| 16 | FALSE | Lactic acid, not alcohol, causes soreness |
| 17 | TRUE | Glucose + O₂ → ATP |
| 18 | FALSE (but marked TRUE) | Pickling = lactic acid fermentation |
| 19 | FALSE | Aerobic respiration makes more ATP |
---
✔ Conclusion
The worksheet is mostly correct, but statement #18 is incorrectly marked as TRUE. It should be FALSE because cucumbers become pickles due to lactic acid fermentation, not alcoholic fermentation.
Let me know if you'd like a corrected version of the worksheet!
Parent Tip: Review the logic above to help your child master the concept of photosynthesis and cellular respiration worksheet answers.
