OCR Biology F214 Communication, Homeostasis and Energy Wed 25 Jan 2012

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Original post by Chris P Chicken.

They some how manage to do so in the book. -_-

Which is why like 70% of people will put non-cyclic.

The book describes photophosphorylation first (inc the ETC) it then goes on to describe cyclic and non-cyclic. They are both photophosphorylation though so both involve the ETC part mentioned in the photophosphorylation part.

Reply 1721

Joseppea

Original post by Dan12

can you remember what the last statement was for where you got C?

I think the cyclic ones were:

The electron returns to the same photosystem it left.
Only involves photosystem I? (possibly - can't remember the exact statement)

Both were:

Produces ATP, involves electron transport chain and something else...

Non-cylic was:
Uses electrons from photolysis (WTTE)
Something about PSII replacing PSI electrons maybe?

Can't really remember :zomg:

Reply 1722

plummango

FROM NHS/ DIABETES WEBSITE

"What are the symptoms of hyperglycemia?
The signs and symptoms include the following:

High blood glucose
High levels of sugar in the urine
Frequent urination "

so whoever wrote HYPERGLYCAEMIA OR DIABETIES, IS LIKELY TO HAVE GOT IT RIGHT.

Reply 1723

undertaker1

Original post by plummango

what question is this for???

Reply 1724

Chloe369

Original post by srutututu

anyone knows whether non-cyclic and cyclic photophosphorylation both involve ETC or is it just non cyclic?

Im pretty sure its both? ahh someone let me knoooow

Reply 1725

Dan12

Original post by plummango

i put nephritis is that correct?

Reply 1726

undertaker1

Original post by Dan12

i put nephritis is that correct?

what question is this???

Reply 1727

the real viper

Original post by Chris P Chicken.

Personally I don't think it will be, but we'll see when the mark scheme comes.

Well it will be because Diabetes Mellitus means 'sweet fountain' in latin :cool:

Reply 1728

plummango

Original post by undertaker1

what question is this for???

The question that asks why there is glucose in the urine

Reply 1729

plummango

Original post by Dan12

i put nephritis is that correct?

Umm...Might be

Sorry I have no idea what that disease is :/

Reply 1730

Dan12

Original post by undertaker1

what question is this???

the one about the disease associated with glucose in the urine

Reply 1731

Chris P Chicken.

Original post by undertaker1

what question is this for???

What is the likely cause of high blood sugar/ What is the condition called...

Answer is most likely hyperglycaemia.

Reply 1732

the real viper

Original post by Chris P Chicken.

No since you have to get an exact answer for the second mark.

Wrong did you look at sig fig in table?

Reply 1733

Dan12

Original post by plummango

Umm...Might be

Sorry I have no idea what that disease is :/

It's basically when the nephrons become inflamed and the glomerulus is injured. Therefore, it isn't working. so I thought that glucose would not be reabsorbed

Reply 1734

undertaker1

Original post by plummango

The question that asks why there is glucose in the urine

Original post by plummango

Umm...Might be

Sorry I have no idea what that disease is :/

Original post by Dan12

the one about the disease associated with glucose in the urine

Original post by Chris P Chicken.

What is the likely cause of high blood sugar/ What is the condition called...

Answer is most likely hyperglycaemia.

hang on wasn't the question why there is load proteins in urine???? and not glucose

i swear it was protein

and the answer would be hypertension

Reply 1735

Legendrew

Original post by undertaker1

hang on wasn't the question why there is load proteins in urine????

and the answer would be hypertension

It was 100% glucose (my teacher got the paper straight after and went through it with us)

I'm pretty certain it'd be Diabetes Mellitus. Hypertension wouldn't explain it since it could be be selectivly reabsorbed in the proximal convoluted tubule. The only way that it'd be present is if it was in such high levels that the proximal convoluted tubule was unable to selectivly reabsorb it all :smile:

Reply 1736

Dan12

Original post by undertaker1

hang on wasn't the question why there is load proteins in urine???? and not glucose

i swear it was protein

and the answer would be hypertension

Well either way, nephritis means that proteins will not be filtered in glomerulus meaning it appears in the urine.

Reply 1737

Dan12

Original post by Legendrew

What about nephritis?

Reply 1738

undertaker1

it was proteins

and the question after that was about why is a lot of urea excreted

there was only one diabetes question why was on the second page in the booklet