Edexcel A2 Biology Unit 5 (6BIO5) - 22/06/2011- OFFICIAL THREAD !

I thought the normal EPO receptor was responsible for shutting down EPO production once Oxygen levels become normal. So wouldn't his mutation have caused the receptor to not be formed/incorrectly formed so EPO production continues past normal oxygen levels?

Yes that is how i understand it

Reply 2361

yagmurainie

Can anyone summarise me what we need to know about Pavlov's dogs,becoming conditioned and operant conditioning. Thankss :smile:

Reply 2362

Choca Mocha

In anaerobic respiration can ATP be produced from oxidative phosphorylation? cos I thought only glycolysis could occur in these conditions to form pyruvate --> lactate etc...

Reply 2363

sar_91

Original post by yagmurainie

Can anyone summarise me what we need to know about Pavlov's dogs,becoming conditioned and operant conditioning. Thankss :smile:

http://nobelprize.org/educational/medicine/pavlov/readmore.html

Reply 2364

chemdweeb1234

Original post by Choca Mocha

In anaerobic respiration can ATP be produced from oxidative phosphorylation? cos I thought only glycolysis could occur in these conditions to form pyruvate --> lactate etc...

Anaerobic respiration leads to the production of ATP via subsrate level phosophorylation of ADP to ATP ... not oxidative phosphorylation

Reply 2365

tkoki1993

10

Original post by Choca Mocha

In anaerobic respiration can ATP be produced from oxidative phosphorylation? cos I thought only glycolysis could occur in these conditions to form pyruvate --> lactate etc...

In anaerobic respiration, oxidative phosphorylation cannot take place as oxygen is not available to be the terminal acceptors. All the electron acceptors are saturated this mean that NAD and FAD cannot be regenerated

Reply 2366

voices1

What is subsrate level phosophorylation ?

Reply 2367

Choca Mocha

Original post by tkoki1993

In anaerobic respiration, oxidative phosphorylation cannot take place as oxygen is not available to be the terminal acceptors. All the electron acceptors are saturated this mean that NAD and FAD cannot be regenerated

Thanks, that's what I thought but the Jan 2011 mark scheme says otherwise... :confused:

Reply 2368

haydyb123

9

Has anyone got notes for the four core practicals? I know this is quite cheeky to ask, but would be much appreciated :smile:

Reply 2369

haydyb123

9

Original post by voices1

What is subsrate level phosophorylation ?

Where the energy for the synthesis of ATP comes from the substrate themselves )in layman's terms)

Reply 2370

tkoki1993

10

Original post by Choca Mocha

Thanks, that's what I thought but the Jan 2011 mark scheme says otherwise... :confused:

Are talking about question 4? If yes here it is
Fast twitch muscles are able to respite anaerobically but they can also respire aerobically. A small amount of aerobic respiration is still able to take place in the mitochondria with the little oxygen available.

Reply 2371

xshopoholicx

Original post by voices1

what is subsrate level phosophorylation ?

A dIRECT TRANSFER OF A PHOSPHATE GROUP FROM AN INTERMIDIATE COMPOUND TO ADP

(edited 12 years ago)

Reply 2372

chemdweeb1234

Original post by Choca Mocha

Thanks, that's what I thought but the Jan 2011 mark scheme says otherwise... :confused:

You have to appreciate the context of the question.... Tkoki posted the explanation above

Reply 2373

Choca Mocha

Original post by tkoki1993

Are talking about question 4? If yes here it is
Fast twitch muscles are able to respite anaerobically but they can also respire aerobically. A small amount of aerobic respiration is still able to take place in the mitochondria with the little oxygen available.

right ok, thanks :smile:

Reply 2374

Choca Mocha

Original post by chemdweeb1234

You have to appreciate the context of the question.... Tkoki posted the explanation above

I have now appreciated the context of the question.

Reply 2375

Meesta

2

Original post by voices1

What is subsrate level phosophorylation ?

The direct transfer of a phosphate group from one molecule to another. In the case of the Krebs cycle, the phosphate group is transferred from the 5 carbon compound intermediate to the ADP molecule to form ATP.

Reply 2376

Jennie_pro

Oh, I just want to watch the tennis, but need to carry on revising!

Reply 2377

fec__123456

2

I am so nervous about tomorrow! How have you revised for synoptic stuff? Is reading the AS revision guide enough do you think?

Reply 2378

LibbyU

Very worried about the exam considering I've done barely anything on the article and revised hardly any synoptic areas.

What synoptic things e.g. from other units, AS etc have people revised?
I've only revised atherosclerosis and enzyme substrate complex :frown: