OCR B7 Unofficial Mark Scheme - Monday 19th June 2017

username1986099

OP

the fermentation question specifically asked for food and the order for eutrophication was DCABE. for the nanoparticles i said it would prevent illness because it shows if food is contaminated and you'll know it's unsafe to eat? i dont remember what it looked like properly so excuse the drawing but will i get the marks for blood pressure and tissue fluid if i labelled it like this??

Probably 1/3 for that question - lowest pressure B is correct. A isn't in the right place and tissue fluid is formed when the plasma is force through the capillary wall and you haven't shown it.

Reply 41

Popsiclez

21

Original post by WAWAW

Really not convinced it did, although it may have done as I was flagging due to the heat!

No I remember specifically I saw useful products it didn't say give foods that fermentation of bacteria and yeast can produce.

Reply 42

Deliciate

14

Eutrophication question was (D)CABE. Also, for why the nitrogen cycle isn't a closed loop system, I would think it was because the animal (rabbit) would consume some of the nitrates and then migrate and also because some nitrates are carried by the air and water. This is what is says in the specification. Moreover, the colour change of the container may also be so that you can see when the product goes off because the bacteria multiplying would increase the concentration of oxygen, I would assume.

Reply 43

username1986099

OP

18

Original post by Deliciate

Eutrophication question was (D)CABE. Also, for why the nitrogen cycle isn't a closed loop system, I would think it was because the animal (rabbit) would consume some of the nitrates and then migrate and also because some nitrates are carried by the air and water. This is what is says in the specification. Moreover, the colour change of the container may also be so that you can see when the product goes off because the bacteria multiplying would increase the concentration of oxygen, I would assume.

I'm sure it's CAEB, and rabbits don't migrate though?

Reply 44

Deliciate

14

Original post by danielwinstanley

I'm sure it's CAEB, and rabbits don't migrate though?

Any organism can migrate out of an ecosystem, it just means leaving the ecosystem, it is not restricted to birds.
http://idahoptv.org/sciencetrek/topics/animal_migration/facts.cfm

Lots of controversy about the CABE/CAEB question but who knows.

Reply 45

username1986099

OP

18

Original post by Deliciate

Any organism can migrate out of an ecosystem, it just means leaving the ecosystem, it is not restricted to birds.
http://idahoptv.org/sciencetrek/topics/animal_migration/facts.cfm

Lots of controversy about the CABE/CAEB question but who knows.

Ahh right - I'll add that in now!

Reply 46

James_D2709

i cant see the match up picture, can someone else post a picture. The one about cartilage and tendons and ligaments :smile:

Reply 47

TheMightyBadger

13

Quite an easy paper tbh. Not that hard, although the nitrogen cycle and a few other questions mugged me off. Oh well, 55 is still quite good.

Reply 48

CandidateZero

14

Original post by Popsiclez

No I remember specifically I saw useful products it didn't say give foods that fermentation of bacteria and yeast can produce.

Thank God, I knew I'd notice that detail! Also, the specification makes little mention of the food products of fermentation, so it makes little sense that they'd roll out a question limited to exactly that.

Reply 49

CandidateZero

14

Original post by Sophief2000

I completely messed up this exam😊😊😊

I'm sure you haven't. The grade boundaries will be quite high, admittedly, but if you tried your hardest you're bound to pick up marks across the paper. Remember: your final grade is determined by your coursework mark, B123 and B456 papers, and the B7 paper so there's certainly room for error in one exam.

Reply 50

kilner

10

Would

1) medecine - Insulin
2) vegetarian meat substitute protein - quorn

be okay for that uses of bacteria one?

Reply 51

LELzexc

5

i didnt get that spain was right?

Reply 52

LELzexc

5

Original post by danielwinstanley

I'm sure it's CAEB, and rabbits don't migrate though?

no its CABE

Reply 53

CandidateZero

14

Original post by kilner

Would

1) medecine - Insulin
2) vegetarian meat substitute protein - quorn

be okay for that uses of bacteria one?

Yes - supports what is stated in the revision guide and in the specification.

Reply 54

NigNog

5

how the **** can the grade boundary for 2015 be 35 for a B then for 2016 be 37 for a C WHAT THE F UCK!!!!!!!!!!!!!! WAS THIS HARDER THAN 2016 PAPER CAN SOMEONE F UCKING EXPLAIN MANS P ISSED DIDNT KNOW GRADE BOUNDARIES WERE AS HIGH AS SNOOP DOGG HAVING AN OUNCE

Reply 55

username1986099

OP

18

Original post by NigNog

how the **** can the grade boundary for 2015 be 35 for a B then for 2016 be 37 for a C WHAT THE F UCK!!!!!!!!!!!!!! WAS THIS HARDER THAN 2016 PAPER CAN SOMEONE F UCKING EXPLAIN MANS P ISSED DIDNT KNOW GRADE BOUNDARIES WERE AS HIGH AS SNOOP DOGG HAVING AN OUNCE

It was about the same level as last years paper.

Reply 56

username1986099

OP

18

Original post by LELzexc

i didnt get that spain was right?

The statement by the student was UK was more tonnes, so Spain had the least so he was right

Reply 57

NigNog

5

Original post by danielwinstanley

It was about the same level as last years paper.

okay just got 40 so i just scraped a C, for ****s sake

Reply 58

kilner

10

just remembered, there was a 2(?) marker where you had to connect the lines, linking the function and properties of the parts of a joint.

the shape i got was (if i remember):
\ / \ /
/ \ -X-
--- / \

Reply 59

kilner

10

Original post by NigNog

okay just got 40 so i just scraped a C, for ****s sake

Don't worry too much- B7 is always people's worst module, you on average score one grade or two worse on it than the other ones since the boundaries are high (only top levels take it)

OCR B7 Unofficial Mark Scheme - Monday 19th June 2017

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