9 Best Worksheets For Exploring The Wonders Of Photosynthesis ... - Free Printable
Educational worksheet: 9 Best Worksheets For Exploring The Wonders Of Photosynthesis .... Download and print for classroom or home learning activities.
JPEG
816×891
118.1 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #2016203
⭐
Show Answer Key & Explanations
Step-by-step solution for: 9 Best Worksheets For Exploring The Wonders Of Photosynthesis ...
▼
Show Answer Key & Explanations
Step-by-step solution for: 9 Best Worksheets For Exploring The Wonders Of Photosynthesis ...
Let's solve this matching exercise step by step. The task is to match each numbered question with the correct lettered answer from the list on the right.
---
→ K. Aerobic
> *Aerobic respiration requires oxygen.*
---
→ M. Anaerobic
> *Anaerobic respiration occurs without oxygen.*
---
→ V. Substrate-level phosphorylation
> *This is a type of phosphorylation where a phosphate group is transferred directly from an organic molecule (like 1,3-bisphosphoglycerate) to ADP to form ATP.*
> *(Note: "Substrate-level phosphorylation" is not listed directly in the options — but it’s implied by "V. Substrate". Let’s assume V stands for "Substrate-level phosphorylation.")*
> ✔ So: V. Substrate
---
→ L. Photophosphorylation
> *Wait — this seems off. "Free Pi attached to ADP" describes ATP synthesis, but photophosphorylation is a specific process in photosynthesis where ATP is made using light energy.*
> But actually, the process of adding free inorganic phosphate (Pi) to ADP to make ATP is phosphorylation, and in photosynthesis, it's called photophosphorylation.
> However, this is not limited to photosynthesis — substrate-level and oxidative phosphorylation also involve Pi + ADP → ATP.
> But since L = Photophosphorylation, and this is one way free Pi attaches to ADP, perhaps this is meant to be L.
> But let’s reconsider: Is there a better fit?
> Actually, none of the choices directly say “substrate-level” or “oxidative”, but L. Photophosphorylation is a specific case where free Pi is added to ADP using light energy.
> So if the question is asking for a process where free Pi is attached to ADP, then L. Photophosphorylation is correct in the context of photosynthesis.
> But wait — the term "free Pi attached to ADP" describes phosphorylation, and both substrate-level and oxidative phosphorylation do this.
> Since V. Substrate might refer to substrate-level phosphorylation, and L. Photophosphorylation is another kind, we must pick based on what fits best.
> But looking at the list: L = Photophosphorylation, which involves free Pi being added to ADP using a proton gradient.
> So: L. Photophosphorylation
> ✔ Answer: L
---
→ N. Reduced
> This doesn't make sense. We need something that gets reduced.
> In cellular respiration, NAD⁺ is reduced to NADH, so NAD⁺ is reduced.
> But N. Reduced is a verb, not a molecule.
> Wait — maybe the answer is O. Regeneration? No.
> Look again: N. reduced — probably not.
> Better choice: NAD⁺ is reduced, but NAD⁺ isn’t listed.
> Wait — 7. NAD⁺ is ____ to NADH — so that will be J. Reduction
> So for #5: What is reduced? → NAD⁺
> But NAD⁺ isn’t in the list.
> Hmm. Maybe the answer is J. Reduction? But that’s a process.
> Or perhaps S. Coenzyme A? No.
> Wait — the electron acceptor is reduced. In cellular respiration, oxygen is the final electron acceptor and is reduced to water.
> So: I. Oxygen is reduced.
> ✔ Answer: I. Oxygen
> *Because oxygen accepts electrons and is reduced to H₂O.*
---
→ C. Glucose
> Glucose is oxidized to CO₂ during cellular respiration.
> ✔ Answer: C. Glucose
---
→ J. Reduction
> NAD⁺ gains electrons (and a proton) to become NADH — this is reduction.
> ✔ Answer: J. Reduction
---
→ X. Phosphofructokinase
> This is the key regulatory enzyme in glycolysis; it catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate.
> ✔ Answer: X. Phosphofructokinase
---
→ Glyceraldehyde-3-phosphate (G3P)
> But G3P is produced later.
> The energy investment phase uses ATP to phosphorylate glucose and fructose-6-phosphate.
> The products are glucose-6-phosphate and fructose-1,6-bisphosphate.
> But none of these are listed.
> Wait — Y. G3P is listed.
> But G3P is produced in the energy payoff phase, not investment.
> So no good match?
> Wait — perhaps the question means intermediate?
> Alternatively, maybe "product" refers to the result after investment — but that’s not really a product.
> Or perhaps they mean "what is formed" — but the only intermediate listed is Y. G3P, which comes later.
> Alternatively, maybe H. Pyruvate? No.
> Perhaps the answer is E. Oxaloacetate? No.
> Wait — maybe the question is misphrased.
> But in glycolysis, the energy investment phase produces two molecules of glyceraldehyde-3-phosphate (G3P) as the end result of the preparatory phase.
> But G3P is produced in the cleavage phase, not investment.
> Investment phase: Glucose → Glucose-6-P → Fructose-6-P → Fructose-1,6-BP → Dihydroxyacetone-P and G3P
> So G3P is the product of the cleavage step.
> But the investment phase ends at Fructose-1,6-bisphosphate.
> So no direct match.
> Wait — perhaps the answer is V. Substrate? Not likely.
> Maybe C. Glucose? But it's consumed.
> Alternatively, perhaps "product" here means the molecule that undergoes further processing.
> But the most plausible answer is Y. G3P, even though it's not strictly from the investment phase.
> Wait — no, G3P is not a product of the investment phase.
> Let’s skip and come back.
> Alternatively, perhaps the answer is H. Pyruvate? No.
> Or F. Thylakoid? No.
> Hmm.
> Wait — maybe "product" refers to the end result of the investment phase, but it's not listed.
> Perhaps the intended answer is Y. G3P, assuming it's the next major product.
> But that’s incorrect.
> Alternatively, maybe "product" means what is produced — but in investment phase, ATP is used, so ADP is produced.
> But ADP isn't listed.
> Wait — perhaps the answer is D. ETC? No.
> I think there may be a mistake.
> But let’s look at #10: final product of glycolysis → H. Pyruvate
> So for #9, maybe the answer is Y. G3P, because it's the intermediate before pyruvate.
> But still, G3P is not a product of the energy investment phase.
> Wait — after investment, the molecule is split into two G3P molecules.
> So G3P is the product of the cleavage step.
> So perhaps the answer is Y. G3P
> ✔ Answer: Y. G3P (assuming it's the main product after investment)
> But technically, G3P is produced after investment.
> Alternatively, maybe "product" means the molecule that results from investment, which is fructose-1,6-bisphosphate — not listed.
> So maybe the answer is not available.
> But since Y. G3P is the only reasonable choice, we'll go with that.
> ✔ Answer: Y. G3P
---
→ H. Pyruvate
> Glycolysis converts glucose to pyruvate.
> ✔ Answer: H. Pyruvate
---
→ Coenzyme A is involved, but the enzyme is pyruvate dehydrogenase complex.
> But S. Coenzyme A is listed.
> Coenzyme A combines with pyruvate to form acetyl-CoA.
> So S. Coenzyme A is the correct choice.
> ✔ Answer: S. Coenzyme A
---
→ E. Oxaloacetate
> Acetyl-CoA + oxaloacetate → citrate
> ✔ Answer: E. Oxaloacetate
---
→ P. Proton
> The proton gradient (H⁺) across the membrane drives ATP synthase.
> ✔ Answer: P. Proton
---
→ I. Oxygen
> Oxygen accepts electrons at the end of the electron transport chain.
> ✔ Answer: I. Oxygen
---
→ Carbon dioxide is reduced to glucose.
> So R. Carbon dioxide
> ✔ Answer: R. Carbon dioxide
---
→ Water is oxidized to O₂.
> So Q. Water
> ✔ Answer: Q. Water
---
→ This is a metaphor — "pancake" refers to thylakoid.
> A single thylakoid is like a pancake.
> ✔ Answer: F. Thylakoid
---
→ A stack of thylakoids is called a granum.
> ✔ Answer: Z. Granum
---
→ This happens in the light reactions of photosynthesis.
> The process is called photophosphorylation.
> ✔ Answer: L. Photophosphorylation
---
→ This is carbon fixation.
> CO₂ is fixed to RuBP to form 3-phosphoglycerate (3PG).
> ✔ Answer: B. Carbon fixation
---
→ This is reduction — 3PG is reduced to G3P using ATP and NADPH.
> ✔ Answer: J. Reduction
---
→ Wait — Rubisco is the enzyme, not a product.
> G3P is used to regenerate RuBP, not Rubisco.
> So this is regeneration of RuBP.
> ✔ Answer: O. Regeneration
---
→ P680 is the reaction center of Photosystem II.
> ✔ Answer: A. Photosystem II
---
→ P700 is the reaction center of Photosystem I.
> ✔ Answer: G. Photosystem I
---
→ P680 loses electrons, which are replaced by water splitting.
> So electrons come from water.
> ✔ Answer: Q. Water
---
→ P700 receives electrons from plastocyanin, which came from photosystem II.
> So the ultimate source is P680, but the immediate source is electron transport chain.
> But the replacement electrons for P700 come from photosystem II via the electron transport chain.
> But the question asks: where do replacement electrons come from?
> For P700, the electrons come from plastocyanin, which is reduced by cytochrome b6f complex, which gets electrons from P680.
> So ultimately, from water, but directly from P680.
> But the answer should be: from the electron transport chain, but not listed.
> Wait — the options include:
> - D. ETC — Electron Transport Chain
> That could be the answer.
> Because P700 is reduced by electrons from the ETC.
> ✔ Answer: D. ETC
---
| Question | Answer |
|--------|--------|
| 1 | K. Aerobic |
| 2 | M. Anaerobic |
| 3 | V. Substrate |
| 4 | L. Photophosphorylation |
| 5 | I. Oxygen |
| 6 | C. Glucose |
| 7 | J. Reduction |
| 8 | X. Phosphofructokinase |
| 9 | Y. G3P |
| 10 | H. Pyruvate |
| 11 | S. Coenzyme A |
| 12 | E. Oxaloacetate |
| 13 | P. Proton |
| 14 | I. Oxygen |
| 15 | R. Carbon dioxide |
| 16 | Q. Water |
| 17 | F. Thylakoid |
| 18 | Z. Granum |
| 19 | L. Photophosphorylation |
| 20 | B. Carbon fixation |
| 21 | J. Reduction |
| 22 | O. Regeneration |
| 23 | A. Photosystem II |
| 24 | G. Photosystem I |
| 25 | Q. Water |
| 26 | D. ETC |
---
1. K
2. M
3. V
4. L
5. I
6. C
7. J
8. X
9. Y
10. H
11. S
12. E
13. P
14. I
15. R
16. Q
17. F
18. Z
19. L
20. B
21. J
22. O
23. A
24. G
25. Q
26. D
---
Let me know if you'd like this formatted as a completed worksheet!
---
1. Type of respiration that takes place in the presence of oxygen
→ K. Aerobic
> *Aerobic respiration requires oxygen.*
---
2. Type of respiration that takes place when there is no oxygen
→ M. Anaerobic
> *Anaerobic respiration occurs without oxygen.*
---
3. Phosphorylation that transfers P from organic molecule to ADP
→ V. Substrate-level phosphorylation
> *This is a type of phosphorylation where a phosphate group is transferred directly from an organic molecule (like 1,3-bisphosphoglycerate) to ADP to form ATP.*
> *(Note: "Substrate-level phosphorylation" is not listed directly in the options — but it’s implied by "V. Substrate". Let’s assume V stands for "Substrate-level phosphorylation.")*
> ✔ So: V. Substrate
---
4. Free Pi attached to ADP
→ L. Photophosphorylation
> *Wait — this seems off. "Free Pi attached to ADP" describes ATP synthesis, but photophosphorylation is a specific process in photosynthesis where ATP is made using light energy.*
> But actually, the process of adding free inorganic phosphate (Pi) to ADP to make ATP is phosphorylation, and in photosynthesis, it's called photophosphorylation.
> However, this is not limited to photosynthesis — substrate-level and oxidative phosphorylation also involve Pi + ADP → ATP.
> But since L = Photophosphorylation, and this is one way free Pi attaches to ADP, perhaps this is meant to be L.
> But let’s reconsider: Is there a better fit?
> Actually, none of the choices directly say “substrate-level” or “oxidative”, but L. Photophosphorylation is a specific case where free Pi is added to ADP using light energy.
> So if the question is asking for a process where free Pi is attached to ADP, then L. Photophosphorylation is correct in the context of photosynthesis.
> But wait — the term "free Pi attached to ADP" describes phosphorylation, and both substrate-level and oxidative phosphorylation do this.
> Since V. Substrate might refer to substrate-level phosphorylation, and L. Photophosphorylation is another kind, we must pick based on what fits best.
> But looking at the list: L = Photophosphorylation, which involves free Pi being added to ADP using a proton gradient.
> So: L. Photophosphorylation
> ✔ Answer: L
---
5. What is reduced in cellular respiration?
→ N. Reduced
> This doesn't make sense. We need something that gets reduced.
> In cellular respiration, NAD⁺ is reduced to NADH, so NAD⁺ is reduced.
> But N. Reduced is a verb, not a molecule.
> Wait — maybe the answer is O. Regeneration? No.
> Look again: N. reduced — probably not.
> Better choice: NAD⁺ is reduced, but NAD⁺ isn’t listed.
> Wait — 7. NAD⁺ is ____ to NADH — so that will be J. Reduction
> So for #5: What is reduced? → NAD⁺
> But NAD⁺ isn’t in the list.
> Hmm. Maybe the answer is J. Reduction? But that’s a process.
> Or perhaps S. Coenzyme A? No.
> Wait — the electron acceptor is reduced. In cellular respiration, oxygen is the final electron acceptor and is reduced to water.
> So: I. Oxygen is reduced.
> ✔ Answer: I. Oxygen
> *Because oxygen accepts electrons and is reduced to H₂O.*
---
6. What is oxidized in cellular respiration?
→ C. Glucose
> Glucose is oxidized to CO₂ during cellular respiration.
> ✔ Answer: C. Glucose
---
7. NAD⁺ is _____ to NADH
→ J. Reduction
> NAD⁺ gains electrons (and a proton) to become NADH — this is reduction.
> ✔ Answer: J. Reduction
---
8. Allosteric regulatory enzyme in glycolysis
→ X. Phosphofructokinase
> This is the key regulatory enzyme in glycolysis; it catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate.
> ✔ Answer: X. Phosphofructokinase
---
9. Product of energy investment phase of glycolysis
→ Glyceraldehyde-3-phosphate (G3P)
> But G3P is produced later.
> The energy investment phase uses ATP to phosphorylate glucose and fructose-6-phosphate.
> The products are glucose-6-phosphate and fructose-1,6-bisphosphate.
> But none of these are listed.
> Wait — Y. G3P is listed.
> But G3P is produced in the energy payoff phase, not investment.
> So no good match?
> Wait — perhaps the question means intermediate?
> Alternatively, maybe "product" refers to the result after investment — but that’s not really a product.
> Or perhaps they mean "what is formed" — but the only intermediate listed is Y. G3P, which comes later.
> Alternatively, maybe H. Pyruvate? No.
> Perhaps the answer is E. Oxaloacetate? No.
> Wait — maybe the question is misphrased.
> But in glycolysis, the energy investment phase produces two molecules of glyceraldehyde-3-phosphate (G3P) as the end result of the preparatory phase.
> But G3P is produced in the cleavage phase, not investment.
> Investment phase: Glucose → Glucose-6-P → Fructose-6-P → Fructose-1,6-BP → Dihydroxyacetone-P and G3P
> So G3P is the product of the cleavage step.
> But the investment phase ends at Fructose-1,6-bisphosphate.
> So no direct match.
> Wait — perhaps the answer is V. Substrate? Not likely.
> Maybe C. Glucose? But it's consumed.
> Alternatively, perhaps "product" here means the molecule that undergoes further processing.
> But the most plausible answer is Y. G3P, even though it's not strictly from the investment phase.
> Wait — no, G3P is not a product of the investment phase.
> Let’s skip and come back.
> Alternatively, perhaps the answer is H. Pyruvate? No.
> Or F. Thylakoid? No.
> Hmm.
> Wait — maybe "product" refers to the end result of the investment phase, but it's not listed.
> Perhaps the intended answer is Y. G3P, assuming it's the next major product.
> But that’s incorrect.
> Alternatively, maybe "product" means what is produced — but in investment phase, ATP is used, so ADP is produced.
> But ADP isn't listed.
> Wait — perhaps the answer is D. ETC? No.
> I think there may be a mistake.
> But let’s look at #10: final product of glycolysis → H. Pyruvate
> So for #9, maybe the answer is Y. G3P, because it's the intermediate before pyruvate.
> But still, G3P is not a product of the energy investment phase.
> Wait — after investment, the molecule is split into two G3P molecules.
> So G3P is the product of the cleavage step.
> So perhaps the answer is Y. G3P
> ✔ Answer: Y. G3P (assuming it's the main product after investment)
> But technically, G3P is produced after investment.
> Alternatively, maybe "product" means the molecule that results from investment, which is fructose-1,6-bisphosphate — not listed.
> So maybe the answer is not available.
> But since Y. G3P is the only reasonable choice, we'll go with that.
> ✔ Answer: Y. G3P
---
10. Final product of glycolysis
→ H. Pyruvate
> Glycolysis converts glucose to pyruvate.
> ✔ Answer: H. Pyruvate
---
11. Enzyme that turns pyruvate into Acetyl CoA
→ Coenzyme A is involved, but the enzyme is pyruvate dehydrogenase complex.
> But S. Coenzyme A is listed.
> Coenzyme A combines with pyruvate to form acetyl-CoA.
> So S. Coenzyme A is the correct choice.
> ✔ Answer: S. Coenzyme A
---
12. Binds with the acetyl group to form Citrate in CAC
→ E. Oxaloacetate
> Acetyl-CoA + oxaloacetate → citrate
> ✔ Answer: E. Oxaloacetate
---
13. ATP synthase is powered by this gradient
→ P. Proton
> The proton gradient (H⁺) across the membrane drives ATP synthase.
> ✔ Answer: P. Proton
---
14. Final electron acceptor of cellular respiration
→ I. Oxygen
> Oxygen accepts electrons at the end of the electron transport chain.
> ✔ Answer: I. Oxygen
---
15. What is reduced in photosynthesis?
→ Carbon dioxide is reduced to glucose.
> So R. Carbon dioxide
> ✔ Answer: R. Carbon dioxide
---
16. What is oxidized in photosynthesis?
→ Water is oxidized to O₂.
> So Q. Water
> ✔ Answer: Q. Water
---
17. One individual pancake in a chloroplast
→ This is a metaphor — "pancake" refers to thylakoid.
> A single thylakoid is like a pancake.
> ✔ Answer: F. Thylakoid
---
18. One stack of pancakes in a chloroplast
→ A stack of thylakoids is called a granum.
> ✔ Answer: Z. Granum
---
19. Synthesis of ATP and NADPH
→ This happens in the light reactions of photosynthesis.
> The process is called photophosphorylation.
> ✔ Answer: L. Photophosphorylation
---
20. Process where CO2 becomes 3PG
→ This is carbon fixation.
> CO₂ is fixed to RuBP to form 3-phosphoglycerate (3PG).
> ✔ Answer: B. Carbon fixation
---
21. Process where 3PG becomes G3P
→ This is reduction — 3PG is reduced to G3P using ATP and NADPH.
> ✔ Answer: J. Reduction
---
22. Process where remaining G3P become Rubisco
→ Wait — Rubisco is the enzyme, not a product.
> G3P is used to regenerate RuBP, not Rubisco.
> So this is regeneration of RuBP.
> ✔ Answer: O. Regeneration
---
23. Where P680 is found
→ P680 is the reaction center of Photosystem II.
> ✔ Answer: A. Photosystem II
---
24. Where P700 is found
→ P700 is the reaction center of Photosystem I.
> ✔ Answer: G. Photosystem I
---
25. Where do replacement electrons come from for P680?
→ P680 loses electrons, which are replaced by water splitting.
> So electrons come from water.
> ✔ Answer: Q. Water
---
26. Where do replacement electrons come from for P700?
→ P700 receives electrons from plastocyanin, which came from photosystem II.
> So the ultimate source is P680, but the immediate source is electron transport chain.
> But the replacement electrons for P700 come from photosystem II via the electron transport chain.
> But the question asks: where do replacement electrons come from?
> For P700, the electrons come from plastocyanin, which is reduced by cytochrome b6f complex, which gets electrons from P680.
> So ultimately, from water, but directly from P680.
> But the answer should be: from the electron transport chain, but not listed.
> Wait — the options include:
> - D. ETC — Electron Transport Chain
> That could be the answer.
> Because P700 is reduced by electrons from the ETC.
> ✔ Answer: D. ETC
---
Final Answers:
| Question | Answer |
|--------|--------|
| 1 | K. Aerobic |
| 2 | M. Anaerobic |
| 3 | V. Substrate |
| 4 | L. Photophosphorylation |
| 5 | I. Oxygen |
| 6 | C. Glucose |
| 7 | J. Reduction |
| 8 | X. Phosphofructokinase |
| 9 | Y. G3P |
| 10 | H. Pyruvate |
| 11 | S. Coenzyme A |
| 12 | E. Oxaloacetate |
| 13 | P. Proton |
| 14 | I. Oxygen |
| 15 | R. Carbon dioxide |
| 16 | Q. Water |
| 17 | F. Thylakoid |
| 18 | Z. Granum |
| 19 | L. Photophosphorylation |
| 20 | B. Carbon fixation |
| 21 | J. Reduction |
| 22 | O. Regeneration |
| 23 | A. Photosystem II |
| 24 | G. Photosystem I |
| 25 | Q. Water |
| 26 | D. ETC |
---
✔ Summary of Matches:
1. K
2. M
3. V
4. L
5. I
6. C
7. J
8. X
9. Y
10. H
11. S
12. E
13. P
14. I
15. R
16. Q
17. F
18. Z
19. L
20. B
21. J
22. O
23. A
24. G
25. Q
26. D
---
Let me know if you'd like this formatted as a completed worksheet!
Parent Tip: Review the logic above to help your child master the concept of photosynthesis worksheet.
