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Edexcel IAL Biology Unit 4 June 2016

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Reply 120

_mkhalid97

Wasn't the enzyme in question 1 a splisosome?

Reply 121

jackien1

Original post by _mkhalid97

Wasn't the enzyme in question 1 a splisosome?

Yeah, Enzyme Z.

Enzyme Y is RNA polymerase.

(i think...)

(edited 7 years ago)

Reply 122

notsoclueless

Original post by Annaaix_

Anna's tragic answer: ''maybe some hair was left behind or maybe some dead skin cells''....... :biggrin:

hahhahaa :P I wrote the exact same thing :P :P

Reply 123

beheiry

That was one stupid exam! does anyone know how many marks can I lose maximum to get an A*

Reply 124

Aimen.

Original post by Annaaix_

I found this hard, I said habitat is its location and environment is the abiotic and biotic factors of the area affecting the organism itself? Guessed again lol and because people had access to medicine and had very good health able to fight the infection also people are more aware of Ebola so they didn't go near infected people and people were treated faster and more efficiently

Man we have twin answers to both :biggrin:

Reply 125

Aimen.

Original post by Sandy_Vega30

5 marks. Did you use random or systematic sampling? i used random.

It was random but it was 6 marks I believe

Reply 126

Aimen.

Original post by beheiry

That was one stupid exam! does anyone know how many marks can I lose maximum to get an A*

18-20!

Reply 127

Aimen.

Original post by Sandy_Vega30

Guys, what about the question that asked about why the DNA is NOT the sequence of genes that code for amino acids. The 4 mark question?

I kinda learnt this so I had no issues! And I reffered to diagram that 3 exons in mrna whereas 4 in pre-mrna so one would be elsewhere so will code for two proteins!

Reply 128

beheiry

Original post by Aimen.

18-20!

You mean 18-20 in unit 4 all in all a2 units?!

Reply 129

chiarac123

Hey guys, how'd you all find the paper? I struggled with the time :frown:

(anyone else?), kinda rushed all the Q8 answers. Was anyone else bummed about there being no photosynthesis questions? Was also kinda bummed at how there wasn't a 5 marker on geographical isolation and evolution and that.

Reply 130

12103763d

How many raw marks for an A ?

Reply 131

0777

I was soooooo hoping photosynthesis and an evoluton question would come. Those are like sure marks.

Reply 132

jackien1

Original post by 12103763d

How many raw marks for an A ?

Usually around 58/90 gets you an A. (If I'm remembering the grade boundaries correctly.)

65/90 gets you an A*, usually.

(edited 7 years ago)

Reply 133

Aimen.

Original post by beheiry

You mean 18-20 in unit 4 all in all a2 units?!

If you lose only 30 marks in UMS in all three units combined (270/300) and 240/300 in AS

Reply 134

AvWOW

Original post by jackien1

Oh man, I wrote about splicing and spliceosome and exons and introns but more of the exons can be arranged in many orders therefore many polypeptides can be made.

I wrote that bit as well

Reply 135

tabetha

Original post by Aimen.

18-20!

A* average has been around 65 raw marks in recent years, so I would say around 25 x

Reply 136

Aimen.

Original post by tabetha

A* average has been around 65 raw marks in recent years, so I would say around 25 x

That gives me relief but you shouldn't really trust averages :redface:

Spoiler

Reply 137

tabetha

Original post by Aimen.

That gives me relief but you shouldn't really trust averages :redface:

Spoiler

oh yeah of course not, just there hasn't been much variation in the last few years, i would hope this exam would be on the low side tho (can't tell if i hated it bc it was difficult or it's just because my fav topics didn't come up :-/ )

Reply 138

Aimen.

Original post by tabetha

It wasn't difficult I guess it was just Different!
The topics were new and there was variation but this makes possibility of low boundaries more possible!