What are the roles of ATP and NADPH in photosynthesis I. 2. 3. 4. ATP and NADPH

Question

What are the roles of ATP and NADPH in photosynthesis I. 2. 3. 4. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce sugars ATP and NADPH are forms of chemical energy produced from the light independent reactions, to be used in the light dependent reactions that produce sugars ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce proteins. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that use sugars as reactants. What is the overall outcome of the light reactions in photosynthesis? I. NADPH and ATP molecules are produced during the light reactions and are used to power the light 2 NADPH and ATP molecules are produced during the light reactions, which are used to power the light 3. Sugar and ATP are produced during the light reactions, which are used to power the light independent 4. Carbon dioxide and NADPH are produced during the light reactions, which are used to power the light independent reactions dependent reactions. reactions dependent reactions. How does the summary equation for metabolism relate photosynthesis and cellular respiration I. Photosynthesis utilizes energy to build carbohydrates while cellular respiration metabolizes carbohydrates 2. Photosynthesis utilizes energy to metabolize carbohydrates while cellular respiration builds carbohydrates 3. Photosynthesis and cellular respiration both utilize carbon dioxide and water to produce carbohydrates. 4. Photosynthesis and cellular respiration both metabolize carbohydrates to produce carbon dioxide and water. Photosynthesis and cellular respiration are found throughout the eukaryotic world. They are complementary to each other because they each use products of the other process. What do the two pathways share I. chloroplasts and mitochondria 2. Photosystems I and II 3. the cytochrome complex 4. thylakoids What cellular features and processes are similar in both photosynthesis and cellular respiration I. 2. 3. 4. Both processes are contained in organelles with single membranes, and both use a version of the cytochrome complex. Both processes are contained in organelles with double membranes, and neither use a version of the cytochrome complex. Both processes are contained in organelles with double membranes, and use a version of the cytochrome complex. Both processes are contained in organelles with single membranes, and neither use a version of the cytochrome complex

Explanation / Answer

What are the roles of ATP and NADPH in Photosynthesis?

Answer: Option (1) ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce sugars

Explanation: Water, light, NADP+, ADP + Pi react in the light dependent reactions to produce Oxygen, ATP, and NADPH.

Light dependent reaction: Water +Light+ NADP + +ADP + Pi --------> O2 + ATP + NADPH

In the light independent reaction (Calvin cycle or Dark reactions) CO2, NADPH, ATP (from above light dependent reaction) participate in the reaction to give Glucose(sugars), NADP+, ADP + Pi.

Light Independent reaction (Calvin cycle or Dark reactions) : CO2+ NADPH + ATP --------->  Glucose(sugars)+ NADP + +ADP + Pi

These facts are mentioned in the option 1, hence the correct answer. Remaining options do not state the facts or state them in the right order they take place. Hence, are not correct

Que: What is the overall outcomee of the light reactions in photosynthesis?

Ans: Option (1) NADPH and ATP molecules are produced during the light reactions and are used to power the light independent reactions

Explanation: Light dependent reaction: Water +Light+ NADP + +ADP + Pi --------> O2 + ATP + NADPH

Light Independent reaction (Calvin cycle or Dark reactions) : CO2+ NADPH + ATP (from above light dependent reaction) --------->  Glucose(sugars)+ NADP +  +ADP + Pi

So, option 1 clearly explains the above 2 reactions. While option 2 says that NADPH and ATP are used for powering light dependent reactions which is not true, as they are used to power light dependent reactions.

Option 3 is also false as it states that sugars and ATP are produced during light reactions which is not true as they are produced in light independent reactions. Option 4 is wrong as it states that CO2 and NADPH are produced during light reaction which is not completely true as, NADPH is produced but not CO2, instead O2 is produced during light reaction

Que: How does the summary equation for metabolism relate photosynthesis and cellular respiration?

Ans: Option (1) Photosynthesis utilizes energy to build carbohydrates while cellular respiration metabolizes carbohydrates

Explanation: Photosynthesis overall reaction: 6CO2 + 6H2O ------------> 6O2 + C6H12O6 (carbohydrates)

Cellular respiration is quite opposite as it metabolizes carbohydrates. Overall reaction is given by:

6O2 + C6H12O6 -------> 6H2O +6CO2 + Energy

Option 2 mentions the opposite to the above reactions, making it a wrong choice. Option 3 is wrong since photosynthesis utilizes carbon dioxide and water to produce carbohydrates but not cellular respiration. Option 4 is wrong since cellular respiration only metabolizes carbohydrates to produce carbon dioxide and water but not photosynthesis.

Que: Photosynthesis and cellular respiration are found throughout the eukaryotic world. They are complementary to each other because they each use products of the other process. What do the two pathways share?

Answer: Option (1) chloroplasts and mitochondria

Explanation: Photosynthesis occurs in chloroplast while cellular respiration occurs in mitochondria

Option 2 is wrong since photosystem I and II occur only in photosynthesis but not in cellular respiration. Cytochrome complexes occurs in mitochondria but not in chloroplast. Thylakoids occur only in chloroplasts and they do not share in cellular respiration. So, the correct answer is option 1

Que: What cellular features and processes are similar in both photosynthesis and cellular respiration?

Ans: Option (3) Both processes are contained in organelles with double membranes and use a version of the cytochrome complex.

Explanation: Mitochondria and chloroplast has two membranes and both use cytochrome complexes

Option 1 and 4 are wrong since they state that mitochondria and chlorplast are sing membrane organelles which is wrong and option 2 is wrong since it states that neither mitochondria not chlorplast use cytochrome complex which is false.

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