A2 biology help required....krebs cycle etc..

reduced NAD provides 2H+ and 2e- for the electron transport chain allowing chemiosmosis and so atp synthesis
just thinking about the other one a bit

hey tsr just wanted the answers to two homework questions....i dont understand them at all! if i could have the answers it would put my mind to rest....been trying for ages!

1) describe the role of reduced nad when respiration takes place in aerobic condition (3 marks)

2) explain why the yeild of ATP from the respiration of one molecule of glucose when oxygen is present is more than the yield of ATP from the respiration of one molecule of glucose under aerobic conditions (5 marks)

Thanks , will give + rep tomorrow to whoever helps

Eh?
Oxygen present? Aerobic conditions? Same thing no?

Wow, when I did A2 biology last year, I never came across the term 'chemiosmosis'
What is it?

um i think its when the H+ ions move through the stalked particle: its the movement of ions down a concentration gradient through a partially permeable membrane blah blah...?

apologies! ANaerobic conditions!

In which case, the only ATP made under anaerobic conditions is the two from glycolysis, as the NADH can't progress to the electron transport chain due to lack of O2. Hence, the vast reserves of potential energy are not harvested and instead, NADH reduced Pyruvate into one of Lactate/Ethanol+CO2.

um i think its when the H+ ions move through the stalked particle: its the movement of ions down a concentration gradient through a partially permeable membrane blah blah...?

Hi there, i could have posted all the answers but... i gotta rush might miss my bus sorry, here i recommend you this thread for all your F214 needs .
http://www.thestudentroom.co.uk/showthread.php?p=23409488#post23409488 <--- clicky

im doing edexcel¬

hey tsr just wanted the answers to two homework questions....i dont understand them at all! if i could have the answers it would put my mind to rest....been trying for ages!

1) describe the role of reduced nad when respiration takes place in aerobic condition (3 marks)

2) explain why the yield of ATP from the respiration of one molecule of glucose when oxygen is present is more than the yield of ATP from the respiration of one molecule of glucose under anaerobic conditions (5 marks)


Thanks , will give + rep tomorrow to whoever helps