OCR Biology A Exam Thread (Breadth - May 26, 2016 and Depth - June 7, 2016)

Lmao was it polynucleotide? I was thinking polypeptide throughout answering that and thankfully it's the same process; was there anything on that question more than the water/reaction type that I might have had some problems with in my confusion?

Reply 601

username1292215

22

Original post by 4nonymous

That was an OK paper, not as hard as I thought it would be. What did people get for that Kb question. I got 164706? (something like that)

Same

Reply 602

FCA342

Original post by 4nonymous

That was an OK paper, not as hard as I thought it would be. What did people get for that Kb question. I got 164706? (something like that)

Yah same I got 16406 or something like that. What are the grade boundaries going to be like, does anyone know?

Reply 603

Jitesh

14

Original post by DoubleDoors

Lmao was it polynucleotide? I was thinking polypeptide throughout answering that and thankfully it's the same process; was there anything on that question more than the water/reaction type that I might have had some problems with in my confusion?

Maybe I misread but the process is the same

Reply 604

Firenze26

OP

20

Original post by haes

What were your answers for the last question about phloem sap?

Basically translocation up to the point where water comes in and create osmotic pressure.

I said it mixes in with the sugar creating sap and then said how since it was in the phloem the sap is called Phloem sap

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Reply 605

OddFuturez

11

I put condensation reaction n water

Reply 606

DoubleDoors

7

Original post by haes

What were your answers for the last question about phloem sap?

I discussed:
-active loading of phloem into sieve tube elements.
-water potential of sieve tube goes down; therefore water moves in by osmosis.
- => high pressure at source; low pressure at sink
- water moves from source to sink down a pressure gradient

Reply 607

username1292215

22

Guys what did you put for the name questions.

Also for the table about the Rhino were we meant to put Animalia for kingdom or Eukaryotae?

Reply 608

torilee

9

Original post by haes

What were your answers for the last question about phloem sap?

I wrote about the difference in hydrostatic pressure between the source and sink, so the sap moves down the pressure gradient. I'm pretty sure that sucrose moving into the phloem at the source decreases the water potential, so net osmosis is into the phloem and the hydrostatic pressure increases. Then at the sink, sucrose moves into the surrounding tissues, water potential decreases and hydrostatic pressure decreases too, creating a pressure gradient, etc. etc.
Don't know if that's right, though :colondollar:

It's probably not tbh

Reply 609

DaVinciGirl

15

Original post by SuperHuman98

Guys what did you put for the name questions.

Also for the table about the Rhino were we meant to put Animalia for kingdom or Eukaryotae?

Animalia

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Reply 610

DoubleDoors

7

Original post by SuperHuman98

Guys what did you put for the name questions.

Also for the table about the Rhino were we meant to put Animalia for kingdom or Eukaryotae?

Eukaryotae is a domain. You were right with Animalia.

Reply 611

4nonymous

11

What did people get for the last question with the letters. I put C for the first one then A,D,F for the second but I probably got it wrong OOPS

Reply 612

MattLS

1

What did people do for the question about malaria and viruses in relation to erythrocytes, I said viruses dont need to respire so they dont use the oxygen in the red blood cells, whereas protoctistas do respire? Not sure if right though

Reply 613

username1292215

22

Whatt did you guys get for the SA:Vol MCQ?

Reply 614

Firenze26

OP

20

Original post by SuperHuman98

Guys what did you put for the name questions.

Also for the table about the Rhino were we meant to put Animalia for kingdom or Eukaryotae?

I'm not sure what you're talking bout for the first one but second is Animalia. (Eukaryote is a domain)

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Reply 615

Jitesh

14

Original post by TH3-FL45H

Didnt even know tonoplast was a thing lol. I just put it was a vacuole

X-cell wall
Y-plasma membrane
Z-vacuole

W-air (had no idea)

Oh what did you put for ytour maths questions? Word on the street is that you're good at maths :biggrin:

Reply 616

username1292215

22

Original post by MattLS

What did people do for the question about malaria and viruses in relation to erythrocytes, I said viruses dont need to respire so they dont use the oxygen in the red blood cells, whereas protoctistas do respire? Not sure if right though