AS Biology paper 22 May 13th 2013

[Monojit Saha]

Nai, we both are wrong.. check Google.. denaturation never occurs at low temp.. enzyme is inactive, that is why it stopped working completely.. :'(

The question clearly mentioned "cold denaturation" so obviously the enzyme is somehow denatured in col condition s/...

 

[prettypearlshy]

I wrote articial passive

hey atleast you wrote something!i completely forgot the word,just lost marks for an easy question its ok,forget about this paper,lets try to better for the other two

 

[rabos1]

I wrote almos

The question clearly mentioned "cold denaturation" so obviously the enzyme is somehow denatured in col condition s/...

almost same answers for enzyme question part a and part c...

 

[Ammirul Shafiq]

Yes, it was one of the last questions.

The disaccharides according to me were: cellobiose, sucrose, maltose, trehalose, from A down D.

I forgot about the sequence of the pictures.If I'm not mistaken, sucrose is the answer for the third/fourth picture

 

[Malik777]

um, i didnt write anything about kinetic energy or collisions though :/, i wrote that the low temperature causes the ionic bond to break (because i thought if it had to do with temperature the bonds that break will be ionic and hydrogen bonds, but for some reason i just wrote for ionic) and so this causes the active site to change shape, therefore active site is no longer complementary to the substrate and ES complex can no longer be formed. aihh, u think this is right? omaigoooooooooooooooooooood. stress. haha

It would be ok you had covered three points (Y) .

 

[MaxStudentALevel]

I wrote antigen binding site or receptor site is specific to antigen.. blah blah.
Vaccine ka I wrote artificial passive.

Vaccines are artificial active my friend. Theres an immune response...

 

[rabos1]

Vaccines are artificial active my friend. Theres an immune response...

I know. That was a huge blunder I made :'(

 

[Jinkglex]

I guess i made a blunder in the sugars structures too :/ But what I dont get is, didnt they say we didnt have to memorize sugar structures, just what alpha and beta glucose is like? Ah well.

 

[MaxStudentALevel]

I know. That was a huge blunder I made :'(

Its not huge at all! Dont worry about it!

I guess i made a blunder in the sugars structures too :/ But what I dont get is, didnt they say we didnt have to memorize sugar structures, just what alpha and beta glucose is like? Ah well.

Oh no we didnt, we just had to identify the sugars monomers

 

[Aishvarya.s]

I completed it 5 minutes before end time
i found some questions fairly difficult to understand, on some places i wasn't sure what to write and what not to so I wrote alot, i just hope they dont cut my marks for writing extra

same here.. the antibiotic obe was confusing...

 

[Aishvarya.s]

Its not huge at all! Dont worry about it!



Oh no we didnt, we just had to identify the sugars monomers

did we have to name da monomers?or da disacharides?

 

[shah zaib]

oh shittt.....in that antibiotic question, i thought they were asking for ANITBODIES and i wrote about anitbodies :/ how much marks did this question have ?

 

[rabos1]

oh shittt.....in that antibiotic question, i thought they were asking for ANITBODIES and i wrote about anitbodies :/ how much marks did this question have ?

Even I did wrong.. answer: antibiotics interferes with cell wall synthesis, enzyme of translation, enzyme of transcription and they interfere with enzyme of metabolic reaction.

My answer: antibiotics interferes with metabolism of prokaryotes.. blah. And then wrote related to tb.. :'(

 

[Jinkglex]

antibiotics:

can mess with cell-wall formation [penicillin]
Can mess with protien synthesis [erythromycin, streptomycin]
can mess with DNA replication

And also, yeah we had to identify monomers, but for that we must know structures na >_<

 

[shah zaib]

Even I did wrong.. answer: antibiotics interferes with cell wall synthesis, enzyme of translation, enzyme of transcription and they interfere with enzyme of metabolic reaction.

My answer: antibiotics interferes with metabolism of prokaryotes.. blah. And then wrote related to tb.. :'(

i got it TOTALLY wrong :/ how much marks did it have ?

 

[Nightmare***]

ALSO. VACCINES ARE ARTIFICIAL PASSIVE OR ARTIFICIAL ACTIVE?

artificial active

 

[Nightmare***]

GUYS HERE IS THE CORRECT DISACCHARIDE NAMINGS !

A-Trehalose B- Maltose C-Cellobois D-Sucrose


My mistake was A And C.......dang

hey !!! this is exactly wat i did...i hope ur right abt this

 

[Malik777]

hey !!! this is exactly wat i did...i hope ur right abt this

(Y)

 

[Abdullah Ali]

Just wanted to ensure one thing... the last question was the one in which we had to number the order of the cardiac cycle right??
The one in which we had to explain why the left side has more muscles than right?? i do not remember ensuring that there was a part after that.. Panicking!!!

 

[plantaholic]

Are you sure about trehalose, i remember it being more of the center ones. It was made up of alpha glucoses?

i remember cellobiose, sucrose, trehalose and maltose a to d
anybody's done the same?