sam72016
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I'm in A2 right now, OCR A biology. I've finished doing photosynthesis and still doing respiration, but what is the difference in functions between NAD NADH NADPH and NADP?
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xozxexo
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NAD and NADP are both co-enzymes.

In photosynthesis the co-enzyme is NADP (nicotinamide adenine dinucleotide phosphate)
It transfers hydrogens from one molecule to another to allow oxidation or reduction.

NADPH is the product of light dependent reactions, (in particular non cyclic photophosphorylation) in this reaction the excited elections in photosystem 1 get transferred to NADP along with a proton from the stroma (H+ ion) creating reduced NADP (NADPH) this is then used in the Calvin Cycle to reduce the two glycerate phosphate (GP) into two Triose Phosphate (TP) molecules with the help of using ATP (energy).

In respiration the co-enzyme is NAD (Nicotinamide adenine dinucleotide) it helps the dehydrogenase enzyme to carry out oxidation reactions. For example in glycolysis, NAD is used in the oxidation section where TP is converted into pyruvate. This conversion happens by producing 4 ATP and NAD collecting two H+ ions (this then forms NADH or reduced NAD.

NADH is then used in the Krebs cycle to convert citrate into a 5 carbon compound. NAD is also used in the Krebs Cycle to help regenerate oxalocelate.


They pretty much have the same function, just called different things for the two different topics
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fruitcocktail
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(Original post by sam72016)
I'm in A2 right now, OCR A biology. I've finished doing photosynthesis and still doing respiration, but what is the difference in functions between NAD NADH NADPH and NADP?
I'm doing OCR A biology too, and from what I believe NADP isn't involved in respiration at all and NAD isn't involved in photosynthesis at all. The only difference between the molecules is that NADP contains an extra phosphate group.
Both NAD and NADP are coenzymes that act as a proton and electron acceptors forming NADH and NADPH respectively.
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(Original post by fruitcocktail)
I'm doing OCR A biology too, and from what I believe NADP isn't involved in respiration at all and NAD isn't involved in photosynthesis at all. The only difference between the molecules is that NADP contains an extra phosphate group.
Both NAD and NADP are coenzymes that act as a proton and electron acceptors forming NADH and NADPH respectively.
NADP/NADPH are used in anabolic, rather than catabolic reactions.
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(Original post by xozxexo)
NAD and NADP are both co-enzymes.

In photosynthesis the co-enzyme is NADP (nicotinamide adenine dinucleotide phosphate)
It transfers hydrogens from one molecule to another to allow oxidation or reduction.

NADPH is the product of light dependent reactions, (in particular non cyclic photophosphorylation) in this reaction the excited elections in photosystem 1 get transferred to NADP along with a proton from the stroma (H+ ion) creating reduced NADP (NADPH) this is then used in the Calvin Cycle to reduce the two glycerate phosphate (GP) into two Triose Phosphate (TP) molecules with the help of using ATP (energy).

In respiration the co-enzyme is NAD (Nicotinamide adenine dinucleotide) it helps the dehydrogenase enzyme to carry out oxidation reactions. For example in glycolysis, NAD is used in the oxidation section where TP is converted into pyruvate. This conversion happens by producing 4 ATP and NAD collecting two H+ ions (this then forms NADH or reduced NAD.

NADH is then used in the Krebs cycle to convert citrate into a 5 carbon compound. NAD is also used in the Krebs Cycle to help regenerate oxalocelate.


They pretty much have the same function, just called different things for the two different topics
NADP/NADPH are also used in animals - for anabolic, rather than catabolic reactions.
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Vinny C
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And both use quantum entanglement... as we are only recently starting to discover. Otherwise the complex reactions would be too slow to support so large a body, tree or dinosaur.
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sam72016
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(Original post by xozxexo)
NAD and NADP are both co-enzymes.

In photosynthesis the co-enzyme is NADP (nicotinamide adenine dinucleotide phosphate)
It transfers hydrogens from one molecule to another to allow oxidation or reduction.

NADPH is the product of light dependent reactions, (in particular non cyclic photophosphorylation) in this reaction the excited elections in photosystem 1 get transferred to NADP along with a proton from the stroma (H+ ion) creating reduced NADP (NADPH) this is then used in the Calvin Cycle to reduce the two glycerate phosphate (GP) into two Triose Phosphate (TP) molecules with the help of using ATP (energy).

In respiration the co-enzyme is NAD (Nicotinamide adenine dinucleotide) it helps the dehydrogenase enzyme to carry out oxidation reactions. For example in glycolysis, NAD is used in the oxidation section where TP is converted into pyruvate. This conversion happens by producing 4 ATP and NAD collecting two H+ ions (this then forms NADH or reduced NAD.

NADH is then used in the Krebs cycle to convert citrate into a 5 carbon compound. NAD is also used in the Krebs Cycle to help regenerate oxalocelate.


They pretty much have the same function, just called different things for the two different topics
Okay thankyou! I find it quite hard to wrap my head around the photosynthesis module so get it mixed up with respiration sometimes
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xozxexo
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(Original post by sam72016)
Okay thankyou! I find it quite hard to wrap my head around the photosynthesis module so get it mixed up with respiration sometimes
No worries, them two topics confuse me the most too. Always mixing up which part goes in which topic haha
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