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1. Why is it that the energy available to plants from photosynthesis is not entirely used in useful work?

2. Why is it that some organisms rely solely on anaerobic respiration?

3. Why is it that the rate of photosynthesis does not keep increasing with an increase in carbon dioxide concentration beyond a certain point?

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1) Why do certain organisms, such as some bacteria , use alternative electron acceptors besides oxygen during cellular respiration, and how does this impact ATP synthesis?

2) Why is the electron transport chain crucial for ATP synthesis during cellular respiration, and how does it relate to the concept of redox reactions?

3) Why do the light-dependent and light-independent reactions of photosynthesis occur in separate compartments of the chloroplast, and how does this contribute to the overall efficiency of the process?

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1- Why do plants need sunlight to perform photosynthesis?
2- Why is the process of cellular respiration necessary for the survival of all living organisms?
3- Why do plants release oxygen as a byproduct of photosynthesis?

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1 why is cellular respiration important for living organisms
2 why is oxygen necessary for cellular respiration to take in.
3.why does glycolysis take place in the cytoplasm and not in the mitochondria

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1- why do plants only release oxygen in the morning?
2- why does photosynthesis not occur at high temperatures?
3- why is cellular respiration important?

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1. Why is cellular respiration necessary for all eukaryotic organisms to produce ATP?

2. Why does glycolysis not require oxygen to take place, while the other stages of cellular respiration do?

3. Why are mitochondria referred to as the "powerhouses" of the cell, and what role do they play in the production of ATP?

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1. Why can photosynthesis not occur at very high temperatures?

2. why is it necessary for plants to balance their intake of carbon dioxide and oxygen during photosynthesis?

3. why is limiting carbon dioxide concentration most likely to have the greatest effect on plants growing in an open field during a hot summer day?

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1. Why do certain plants exhibit different rates of photosynthesis, even when grown under the same environmental conditions?

2. Why is chlorophyll the primary pigment involved in photosynthesis, and what role does it play in the process?

3. Why is photosynthesis considered the most important biochemical process on Earth?

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1- why does photosynthesis occur at the bottom of a plant more often?
2- why does ADP turn to ATP in glycolysis?
3- why are photosynthesis and cellular respiration somewhat related although they are nearly opposites?

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1. Why is the molecule Coenzyme A needed in the Krebs cycle?

2. Why don't light independent reactions need light?

3. Why does cellular respiration produce the most ATP?

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1- Why do plants acquire hydrogen from water molecules (when oxygen is a waste product)?

2- In the last stage of the Calvin Cycle the remaining 3-carbon molecule becomes a 5-carbon molecule through the use of ATP, where do the additional 2 Carbon atoms come from?

3- Photosynthesis and Cellular Respiration cannot sustain each other due to the difference in the amounts needed and produced by the 2 processes, why didn't plants (by evolution) develop chloroplasts/mitochondria that can work with those amounts and therefore sustain themselves with very limited need for outside sources of energy?

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1- Why does photosynthesis occur more often or at higher levels near oceans?
2- Why is it essential that a cell constantly produces ATP?
3- Why does the Calvin cycle happen if there is already a six-carbon molecule present?

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- What is ATP and NADPH needed for in the Calvin cycle?

- Why does the Calvin cycle occur even though we already have a 6-carbon molecule?

- How is Glycolysis related to cellular respiration?

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Why is oxygen necessary for cellular respiration?

Why does anaerobic respiration yield less ATP than aerobic respiration?

Why do plants use chlorophyll to absorb light energy during photosynthesis?

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-Why does the Calvin cycle happen if we already have a 6-carbon molecule?
-Why is the green wavelength reflected by chlorophyll?
_Why does the "light independent reaction" only take place in the day even though it does not depend on light?

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1- why is glycolysis needed for cellular respiration?
2-  why is cellular respiration important?
3- why is photosynthesis an endothermic reaction?

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1) Why are the 2 photosystems classified as light-dependent reactions?
2)Why wouldn't photosynthesis occur if the plant was only exposed to a red light?
3)Why does NADPH turn into NADP+ during the Calvin cycle?

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1) Why does chemosynthesis need hydrothermal vents?
2) Why does cellular respiration occur in mitochondria?
3) Why is ATP important for cellular respiration and photosynthesis?