AS Biology variant 22

[nehaoscar]

Hey guys
Since it's over 24 hrs i thought we could compare answers?
Variant 22 only please

 

[Amandaissocoollike]

i completely messed up the graph question lol. what did you guys write?

 

[Rohan O]

Graph one was hard!!

 

[Abdul Hanan]

i completely messed up the graph question lol. what did you guys write?

the last part of graph question was hard i still am not sure what we had to write for 4 marks!

 

[Salu1995]

the last part of graph question was hard i still am not sure what we had to write for 4 marks!

that primary structure thingy?

 

[Abdul Hanan]

that primary structure thingy?

yes!

 

[Salu1995]

yes!

i was truly baffled when i read it was of 4 marks... I wrote random stuff like different number of amino acids, different sequences of amino acids, different amino acids (R groups) hence different responsiveness to temperature and therefore the activity... probably 2/4 for the effort .

 

[Abdul Hanan]

i was truly baffled when i read it was of 4 marks... I wrote random stuff like different number of amino acids, different sequences of amino acids, different amino acids (R groups) hence different responsiveness to temperature and therefore the activity... probably 2/4 for the effort .

i wrote exactly the same! i guess the marking scheme will sure mention the point "different amino acids" i wrote "stronger bonds" too for the one surviving high temp.

 

[Salu1995]

i wrote exactly the same! i guess the marking scheme will sure mention the point "different amino acids" i wrote "stronger bonds" too for the one surviving high temp.

i thought about one point later but i dont think its right... Since there are different R groups in primary structure, when the tertiary structure will be formed( 3D) shape, there will be different bonding etc, so a different 3D shape will be formed..

 

[Abdul Hanan]

i thought about one point later but i dont think its right... Since there are different R groups in primary structure, when the tertiary structure will be formed( 3D) shape, there will be different bonding etc, so a different 3D shape will be formed..

nope they have the same substrate their shape has to be same. Different amino acids can lead to same secondary & tertiary structure only i guess.

 

[Salu1995]

nope they have the same substrate their shape has to be same. Different amino acids can lead to same secondary & tertiary structure only i guess.

Phew.. Thank God i decided to not write it..

 

[Abdul Hanan]

Phew.. Thank God i decided to not write it..

By the way, did you give chem? how did it go?! it went totally not good for me

 

[Salu1995]

By the way, did you give chem? how did it go?! it went totally not good for me

better than i had hoped for. Organic was the easiest in history.. the oxides part was the only hard part.. Hoping to touch the magical 50 mark..

 

[Abdul Hanan]

better than i had hoped for. Organic was the easiest in history.. the oxides part was the only hard part.. Hoping to touch the magical 50 mark..

it went the opposite for me idk why i found organic the hardest found this paper harder than 2014's.

 

[Salu1995]

nah. oh i somehow messed up the enthalpy.. Forgot to break the C-C bond.. FML.

 

[Abdul Hanan]

nah. oh i somehow messed up the enthalpy.. Forgot to break the C-C bond.. FML.

it was -300 something right?

 

[Salu1995]

seems you forgot to break it too ... it was around 120 as far as i know

 

[Abdul Hanan]

seems you forgot to break it too ... it was around 120 as far as i know

sign was negative? if so we will loose 1 mark only..

 

[thementor]

sign was negative? if so we will loose 1 mark only..

it was -119
what did you get for your relative isotopic mass? in Q1
and in Q2 what were your oxidation no. changes

 

[Abdul Hanan]

it was -119
what did you get for your relative isotopic mass? in Q1
and in Q2 what were your oxidation no. changes

i think oxidations were zero to -2 oxygen. sulfur i dont remember..what did you write? isotopic mass was 24. something.. sorry for estimates i don't remember exactly