EDEXCEL Biology Unit 2 6BIO2 21st May 2012

Original post by Godsavemefromexams

Help me with that as well! I am not so sure -
1) Sister chromatids reach opposite poles
2) Chromosomes decondense
3) Nucleolus appears
4) Nuclear envelope forms

LOL

From what i gather its the OPPOSITE of metaphase

so chromatids recondense
membrance reappears
but im confuzzeled with this who cytokinesis thing!

Reply 383

ummm

16

Original post by VRS

It is literally

Stacks of membrane that look like pitta bread on top of each other

they go small to large to small

with vesicles joining them by endocytosis

and from the other side leaving them by exocytosis

Thanks! So like this? Btw, is the blue line correct (it's showing the movement of proteins through the golgi apparatus).

What is the cocave/convex stuff the markscheme talks about?

Reply 384

Original post by ummm

Does anyone have a picture of how to actually properly draw a golgi apparatus?

Hahaha i realise my drawing is crap cuz i hate paint! :P
but you get the idea!
thats what they want

Reply 385

Original post by This Honest

I put a nucleus :colonhash:

Don't ask why.

It had ribosomes in it, and a loop or DNA ?

Reply 386

Original post by Godsavemefromexams

I have looked through all the mark schemes that had prophase as a question!
All they want for 5 marks is this (in the right order) :-
1) Chromosomes condense
2) Nuclear envelope breaks
3) nucleolus disappears
4) centrioles move to opposite poles
5) spindle fibres form

Hope this helps!!

Nice use of the edexcel revision guide there :smile:

Reply 387

ummm

16

Original post by Godsavemefromexams

Hahaha i realise my drawing is crap cuz i hate paint! :P
but you get the idea!
thats what they want

Haha, thanks! It's better than my paint picture in the post above yours :tongue:

So how come CGP kind of shows it like that, but as though there are two back-to-back (like in my drawing above)? And so vesicles are supposed to be attached to the end of the last cisternae?

(edited 11 years ago)

Reply 388

Original post by VRS

LOL

From what i gather its the OPPOSITE of metaphase

so chromatids recondense
membrance reappears
but im confuzzeled with this who cytokinesis thing!

Opposite of prophase rather!
Oh cytokenesis is easy!

It is basically where the cytoplasm of the cell divides equally and the organelles divide themselves equally as well! At the end of telophase, the membrane in between pinches off, forming two identical cells with membranes....makes sense? or am i just blabbering :P

Reply 389

Original post by Godsavemefromexams

Hahaha i realise my drawing is crap cuz i hate paint! :P
but you get the idea!
thats what they want

Cisternae would be pointing at 2 or more (plural)
But nice drawing :smile:

Are vesicles above and below also?
Do we have to learn how protein in modified?

Reply 390

HAHAHAHAH I love that book! <3

Reply 391

Original post by ummm

Thanks! So like this? Btw, is the blue line correct (it's showing the movement of proteins through the golgi apparatus).

What is the cocave/convex stuff the markscheme talks about?

That is correct

try and keep the shape consistent, as in because your two middle ones are away from each im not 100% but ive always seen them "spooning each other"

concave, is literally a shape, like a donut (without the hole) but instead a dip - exactly like a red blood cell!

blue line is correct if it is indicating the movement of a protein through it

Reply 392

Original post by YellowAndBlack

Cisternae would be pointing at 2 or more (plural)
But nice drawing :smile:

Are vesicles above and below also?
Do we have to learn how protein in modified?

vesicles are both above and below

below as they accept them to package them

above by exocytosis to send them to wherever they need to go to

Reply 393

Well, you NEED to draw vesicles both above and below cuz the above ones come from the rER and the ones below are released by the golgi body!

Yes, you NEED to know how protein in modified in the golgi body!
You need help with that?

Reply 394

Original post by Godsavemefromexams

HAHAHAHAH I love that book! <3

It's a lifesaver hahaha !!! It's so amazing!
It simplifies everything and is basically just a markscheme haha

Reply 395

Original post by Godsavemefromexams

Well, you NEED to draw vesicles both above and below cuz the above ones come from the rER and the ones below are released by the golgi body!

Yes, you NEED to know how protein in modified in the golgi body!
You need help with that?

correct ....

and YES!

Reply 396

Original post by Godsavemefromexams

Well, you NEED to draw vesicles both above and below cuz the above ones come from the rER and the ones below are released by the golgi body!

Yes, you NEED to know how protein in modified in the golgi body!
You need help with that?

Hahaha the vesicles bit you got from the revision guide!

Yes how are the modified in the golgi body?
Thanks

Reply 397