Does anyone know how to mark biology essays?
I have done a paragraph of my essay and would love if someone could look through it and mark it maybe out of 6 so I can see what I need to add or keep the same!
Thank u
organisms use respiration to form ATP in the reaction/glucose+oxygen→ CO2 + water. The first stage of respiration is glycolysis where a molecule of glucose is converted into get hexose phosphate and then to hexose biphosphate which is unstable so forms 2 triose phosphates. This requires 2 ATP. Then 4 NAD and 4ADP convert this into 2 pyruvate leaving a net gain of 2ATP and 4 reduced NADA. The link reaction then forms acetate which goes to acetyl CoA by using NAD and CoA. CoA is an enzyme which catalyses the krebs cycle. The krebs cycle involves acetyl CoA reacting with oxaloacetate which forms citrate by removing the CoA to be reused in the link reaction. Then this makes an unstable 5 carbon compound by removing a CO2 and a H using NAD. more coz is removed called decarboxylation and FAD and Nad remove hydrogens to regenerate oxaloacetate.
This is important because without the products of the link reaction, glycolysis and the krebs cycle; the respiring organisms wouldn't be able to carry out oxidative phosphorylation which makes compounds more reactive often forming ATP. This is significant as muscle tissues require ATP to carry out an effect. Also for every 6 turns of the respiration cycle there are 32 ATP molecules (adenosine triphosphate) which is important as if the organisms couldn't aerobically respire the amount of anaerobic ATP made is far less, meaning that the organism would struggle to produce enough energy to carry out it's metabolic processes.
Thank u
organisms use respiration to form ATP in the reaction/glucose+oxygen→ CO2 + water. The first stage of respiration is glycolysis where a molecule of glucose is converted into get hexose phosphate and then to hexose biphosphate which is unstable so forms 2 triose phosphates. This requires 2 ATP. Then 4 NAD and 4ADP convert this into 2 pyruvate leaving a net gain of 2ATP and 4 reduced NADA. The link reaction then forms acetate which goes to acetyl CoA by using NAD and CoA. CoA is an enzyme which catalyses the krebs cycle. The krebs cycle involves acetyl CoA reacting with oxaloacetate which forms citrate by removing the CoA to be reused in the link reaction. Then this makes an unstable 5 carbon compound by removing a CO2 and a H using NAD. more coz is removed called decarboxylation and FAD and Nad remove hydrogens to regenerate oxaloacetate.
This is important because without the products of the link reaction, glycolysis and the krebs cycle; the respiring organisms wouldn't be able to carry out oxidative phosphorylation which makes compounds more reactive often forming ATP. This is significant as muscle tissues require ATP to carry out an effect. Also for every 6 turns of the respiration cycle there are 32 ATP molecules (adenosine triphosphate) which is important as if the organisms couldn't aerobically respire the amount of anaerobic ATP made is far less, meaning that the organism would struggle to produce enough energy to carry out it's metabolic processes.
Hi, I'm in Y13 doing biology. I'm I right to think you do AQA? I usually get 23/25 marks on my essays for reference.
What I would have said if you want to keep the contents of this would be...
Respiration produces ATP, this is a four stage process. The first stage of glycolysis uses 2 molecules of ATP to phosphorylate glucose and produce phosphorylated glucose, as it is unstable the molecule splits into 2 molecules of triose phosphate. Triose phosphate is oxidised to form pyruvate by the oxidation of triose phosphate which produces 2 molecules of ATP from ADP+Pi and reduces NAD to NADH. There is a net gain of 2ATP at this stage. If the respiration were anaerobic this would be the end point. In aerobic respiration pyruvate is then decarboxylated to produce acetate. Another NAD is reduced to NADH. Coenzyme A is added to acetate to form acetylCoA. This molecules moves into the Krebs cycle from the link reaction. AcetylCoA has the CoA removed and is combined with oxaloacetate(4C). This forms a six carbon molecule which is decarboxylated by a removal of 2CO2, 3 molecules of NAD 1 molecule of FAD are reduced to NADH and FADH and a molecule of ATP is produced for each acetylCoA. NADH and FADH carry the protons and electrons to the electron transport chain in the stage of oxidative phosphorylation. NADH and FADH are oxidised to produce NAD+ H+ + e-, and FADH goes to FAD + H+ + e-. The electrons move through the electron transport chain and release energy which pumps protons into the intermembrane space. This creates an electrochemical gradient and the protons move through ATP synthase generating ATP from ADP+Pi, approximately 32 molecules. Oxygen is the final electron and proton acceptor forming water as a waste product.
The production of ATP in respiration is important in muscular contractions which allow an animal to move away or towards a stimulus which helps them survive. As well as maintaining the resting potential of the axon membrane which allows the membrane to be depolarised when an action potential arrives.
I think what you have written in your answer is quite a lot, remember you will need to talk about 4-5 topics in the essay. If you solely focus on one aspect you will limit yourself. The Kreb cycle and the oxidative phosphorylation may be enough to get you AO1 marks, you can mention that glycolysis and link reaction produce certain things that go to initiate the cycle, but if you talk too much about them then you eat up the time that you would have for other discussion points. Krebs and the electron chain make up the bulk of the ATP that you want from respiration.
That is of course my opinion and I would definitely welcome any constructive criticism or advice that can help or correct any mistakes that might be present in my answer.
I hope this helps. Good luck.
What I would have said if you want to keep the contents of this would be...
Respiration produces ATP, this is a four stage process. The first stage of glycolysis uses 2 molecules of ATP to phosphorylate glucose and produce phosphorylated glucose, as it is unstable the molecule splits into 2 molecules of triose phosphate. Triose phosphate is oxidised to form pyruvate by the oxidation of triose phosphate which produces 2 molecules of ATP from ADP+Pi and reduces NAD to NADH. There is a net gain of 2ATP at this stage. If the respiration were anaerobic this would be the end point. In aerobic respiration pyruvate is then decarboxylated to produce acetate. Another NAD is reduced to NADH. Coenzyme A is added to acetate to form acetylCoA. This molecules moves into the Krebs cycle from the link reaction. AcetylCoA has the CoA removed and is combined with oxaloacetate(4C). This forms a six carbon molecule which is decarboxylated by a removal of 2CO2, 3 molecules of NAD 1 molecule of FAD are reduced to NADH and FADH and a molecule of ATP is produced for each acetylCoA. NADH and FADH carry the protons and electrons to the electron transport chain in the stage of oxidative phosphorylation. NADH and FADH are oxidised to produce NAD+ H+ + e-, and FADH goes to FAD + H+ + e-. The electrons move through the electron transport chain and release energy which pumps protons into the intermembrane space. This creates an electrochemical gradient and the protons move through ATP synthase generating ATP from ADP+Pi, approximately 32 molecules. Oxygen is the final electron and proton acceptor forming water as a waste product.
The production of ATP in respiration is important in muscular contractions which allow an animal to move away or towards a stimulus which helps them survive. As well as maintaining the resting potential of the axon membrane which allows the membrane to be depolarised when an action potential arrives.
I think what you have written in your answer is quite a lot, remember you will need to talk about 4-5 topics in the essay. If you solely focus on one aspect you will limit yourself. The Kreb cycle and the oxidative phosphorylation may be enough to get you AO1 marks, you can mention that glycolysis and link reaction produce certain things that go to initiate the cycle, but if you talk too much about them then you eat up the time that you would have for other discussion points. Krebs and the electron chain make up the bulk of the ATP that you want from respiration.
That is of course my opinion and I would definitely welcome any constructive criticism or advice that can help or correct any mistakes that might be present in my answer.
I hope this helps. Good luck.
Original post by bellaxmaisey07
I have done a paragraph of my essay and would love if someone could look through it and mark it maybe out of 6 so I can see what I need to add or keep the same!
Thank u
organisms use respiration to form ATP in the reaction/glucose+oxygen→ CO2 + water. The first stage of respiration is glycolysis where a molecule of glucose is converted into get hexose phosphate and then to hexose biphosphate which is unstable so forms 2 triose phosphates. This requires 2 ATP. Then 4 NAD and 4ADP convert this into 2 pyruvate leaving a net gain of 2ATP and 4 reduced NADA. The link reaction then forms acetate which goes to acetyl CoA by using NAD and CoA. CoA is an enzyme which catalyses the krebs cycle. The krebs cycle involves acetyl CoA reacting with oxaloacetate which forms citrate by removing the CoA to be reused in the link reaction. Then this makes an unstable 5 carbon compound by removing a CO2 and a H using NAD. more coz is removed called decarboxylation and FAD and Nad remove hydrogens to regenerate oxaloacetate.
This is important because without the products of the link reaction, glycolysis and the krebs cycle; the respiring organisms wouldn't be able to carry out oxidative phosphorylation which makes compounds more reactive often forming ATP. This is significant as muscle tissues require ATP to carry out an effect. Also for every 6 turns of the respiration cycle there are 32 ATP molecules (adenosine triphosphate) which is important as if the organisms couldn't aerobically respire the amount of anaerobic ATP made is far less, meaning that the organism would struggle to produce enough energy to carry out it's metabolic processes.
Thank u
organisms use respiration to form ATP in the reaction/glucose+oxygen→ CO2 + water. The first stage of respiration is glycolysis where a molecule of glucose is converted into get hexose phosphate and then to hexose biphosphate which is unstable so forms 2 triose phosphates. This requires 2 ATP. Then 4 NAD and 4ADP convert this into 2 pyruvate leaving a net gain of 2ATP and 4 reduced NADA. The link reaction then forms acetate which goes to acetyl CoA by using NAD and CoA. CoA is an enzyme which catalyses the krebs cycle. The krebs cycle involves acetyl CoA reacting with oxaloacetate which forms citrate by removing the CoA to be reused in the link reaction. Then this makes an unstable 5 carbon compound by removing a CO2 and a H using NAD. more coz is removed called decarboxylation and FAD and Nad remove hydrogens to regenerate oxaloacetate.
This is important because without the products of the link reaction, glycolysis and the krebs cycle; the respiring organisms wouldn't be able to carry out oxidative phosphorylation which makes compounds more reactive often forming ATP. This is significant as muscle tissues require ATP to carry out an effect. Also for every 6 turns of the respiration cycle there are 32 ATP molecules (adenosine triphosphate) which is important as if the organisms couldn't aerobically respire the amount of anaerobic ATP made is far less, meaning that the organism would struggle to produce enough energy to carry out it's metabolic processes.
What about NAD to NADH + H+?
What about the other carbon compounds in the circle(there are also some with four and three C-atoms, temporary)?
What about FAD to FADH2?
There are some important details you missed to mention.
@flowersinmyhair
@DerDracologe
@always-anxious
Maybe you three find another things.
Original post by Kallisto
What about NAD to NADH + H+?
What about the other carbon compounds in the circle(there are also some with four and three C-atoms, temporary)?
What about FAD to FADH2?
There are some important details you missed to mention.
@flowersinmyhair
@DerDracologe
@always-anxious
Maybe you three find another things.
What about the other carbon compounds in the circle(there are also some with four and three C-atoms, temporary)?
What about FAD to FADH2?
There are some important details you missed to mention.
@flowersinmyhair
@DerDracologe
@always-anxious
Maybe you three find another things.
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