OCR Biology F211 (cells, exchange and transport) - 11th Jan 2012

OP

Original post by ManPowa

Predictions anyone. Please. What do You think the big markers will be????

quote me. thanks

Mitosis maybe, for a 5 marker.

Reply 62

otrivine

14

Original post by -Haz-

Mitosis maybe, for a 5 marker.

Like what on mitosis describing metaphase e.t.c?

Reply 63

OP

Original post by otrivine

Like what on mitosis describing metaphase e.t.c?

Maybe cell division as a whole. Such as, ‘outline the stages of the cell cycle’

Reply 64

otrivine

14

Original post by -Haz-

Maybe cell division as a whole. Such as, ‘outline the stages of the cell cycle’

Do you say
Interphase DNA replication
Mitosis
Cytokinesis
Growth phase

Are these the answers? :smile:

Reply 65

OP

Original post by otrivine

Do you say
Interphase DNA replication
Mitosis
Cytokinesis
Growth phase

Are these the answers? :smile:

Yeah I guess, but for a 5 marker you’d have to expand on them. In a question like that I’d probably just briefly describe what happens in interphase, prophase, metaphase, anaphase and telophase.

Reply 66

Amiraa

Original post by otrivine

Do you say
Interphase DNA replication
Mitosis
Cytokinesis
Growth phase

Are these the answers? :smile:

Ain't Cytokinesis part of mitosis?? :K:

Reply 67

otrivine

14

Original post by Amiraa

Ain't Cytokinesis part of mitosis?? :K:

yes it is a part of mitosis because it is where the cytoplasm divides to form 2 new cells

Reply 68

Original post by -Haz-

Mitosis maybe, for a 5 marker.

Maybe, Im thinking the cardiac cycle or carriage of co2.

Can you help me with the spirometer?

Breathing in - chamber sinks down
Breathing out - chamber floats up

That is correct, but is it yourself blowing in to your body or blowing in to the spirometer? If you get that broo.

Reply 69

OP

Original post by ManPowa

Can you help me with the spirometer?

Breathing in - chamber sinks down
Breathing out - chamber floats up

That is correct, but is it yourself blowing in to your body or blowing in to the spirometer? If you get that broo.

When a person breathes in, this takes oxygen from the chamber which makes it sink down. Breathing out pushes air into the chamber which causes the chamber to float up.
So it’s the act of blowing into the spirometer that makes the chamber go up, and then when the person breathes in, the chamber goes down because the oxygen in the chamber is going into the person’s body. Hope I understood your question correctly.

Reply 70

Alotties

10

I'm taking this exam :smile:

I've done nearly all the past papers, got A's on all except one, which I scraped an E on... I'm hoping for a decent paper :tongue:

Reply 71

Natalie21

15

Original post by Alotties

I'm taking this exam :smile:

I've done nearly all the past papers, got A's on all except one, which I scraped an E on... I'm hoping for a decent paper :tongue:

Which one did you scrape an E on?

Reply 72

Original post by -Haz-

When a person breathes in, this takes oxygen from the chamber which makes it sink down. Breathing out pushes air into the chamber which causes the chamber to float up.
So it’s the act of blowing into the spirometer that makes the chamber go up, and then when the person breathes in, the chamber goes down because the oxygen in the chamber is going into the person’s body. Hope I understood your question correctly.

perfectly thanks :smile:

Reply 73

Original post by Alotties

I'm taking this exam :smile:

I've done nearly all the past papers, got A's on all except one, which I scraped an E on... I'm hoping for a decent paper :tongue:

what paper was that??

And Im predicting a challenging- module 2 dominated paper.. January papers are also harder. That is the trend.

Reply 74

HeavyTeddy

16

Pretty nervous about this paper. Is anyone revising by the checklist? I'm changing the checklist into questions and then answering them. Is this a good way to revise since OCR have to abide by the checklist?

I need help with the fetal haemaglobin stuff, I'm not sure about how it works and why a fetus needs to have a higher affinity to oxygen than the mother, if that makes sense @_@?

Thanks. ;D

Reply 75

Ketchup'n'Mustard

13

Original post by HeavyTeddy

Pretty nervous about this paper. Is anyone revising by the checklist? I'm changing the checklist into questions and then answering them. Is this a good way to revise since OCR have to abide by the checklist?

I need help with the fetal haemaglobin stuff, I'm not sure about how it works and why a fetus needs to have a higher affinity to oxygen than the mother, if that makes sense @_@?

Thanks. ;D

It needs to have a higher affinity as it's haemoglobin needs to pick up oxygen from low partial pressures of oxygen (as the oxygen may have already been 'used' up by the mother in other parts of the body, so there will be less of it present if that makes sense).

Also there is a low pO2 in the placenta so haemoglobin is more likely to dissociate from the oxygen molecules.

Reply 76

adamshabir01

what are they big mark quetions that are most likely to come up in the exam andd does anyone know if the grade boundaries are going to be high or low?? :smile:

Reply 77