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OCR New Specification F215 16th June 2010

Sarge92

How did you guys find the exam? :confused:

I FacePalm'ed myslef when I realised I had said a Squirrel is a secondary consumer! They eat nuts fool :yep:

Reply 1

E-J

i found it pretty horrendous. apart from the long questions they were alright i thought.

Reply 2

Vanita28

yeh the exam was ok but it could have been better some of the questions were :/

Reply 3

ArchwayGeogger

so many suggest questions :s-smilie:

Reply 4

Chaosworld

wat did u guys put for the question on which mutation lead to most serius consequences & why for the following:

21 base pair deletion, 13 bas pair deletion or silent mutation

Reply 5

oaktrees

13 base pair. Causes a frameshift, so affects the whole amino acid sequence because 13 isn't a multiple of 3, and a codon of 3 base pairs codes for each amino acid. (Sorry, not very well explained.)

Reply 6

neutrino!

8

oaktrees

13 base pair. Causes a frameshift, so affects the whole amino acid sequence because 13 isn't a multiple of 3, and a codon of 3 base pairs codes for each amino acid. (Sorry, not very well explained.)

yes

thats exactly what i put! hopefully 3 marks in the bag...

Reply 7

beansonfish

1

oaktrees

13 base pair. Causes a frameshift, so affects the whole amino acid sequence because 13 isn't a multiple of 3, and a codon of 3 base pairs codes for each amino acid. (Sorry, not very well explained.)

I just said 13 causes frameshift of whole amino acid changing the whole primary structure. Then said somthing like even the substitution may be a silent mutation or somthng.... I FAILED that exam.

Did any1 else accept the null hypothesis and say it was down to chance? I got 0.32 for X^2 and read it off as rejected.... GAHH!!! SUCH A HORRIBLE PAPER!

Reply 8

beansonfish

1

neutrino!

yes

thats exactly what i put! hopefully 3 marks in the bag...

GAHHH i was like that after the first 2 pages then came to the flies and had to start unpacking my bag! :woo:

Reply 9

DR_X

oaktrees

13 base pair. Causes a frameshift, so affects the whole amino acid sequence because 13 isn't a multiple of 3, and a codon of 3 base pairs codes for each amino acid. (Sorry, not very well explained.)

this could also happen to the 21 base pairs......youd don;t have to delete exactly 7 triplets.......yes?... :confused:

Reply 10

neutrino!

8

what was up with that fly question - did anyone else just put 'it has legs growing out of its face' or was i missing something here ?

Reply 11

The TSR Star.

11

DR_X

this could also happen to the 21 base pairs......youd don;t have to delete exactly 7 triplets.......yes?... :confused:

It must have been suggest. You cannot choose which one is more detrimental because it depends on the gene.

Reply 12

DnB_head

neutrino!

what was up with that fly question - did anyone else just put 'it has legs growing out of its face' or was i missing something here ?

Yeah, in the mutant fly, it has a pair of legs instead of antennae, because the Antp gene is switched on in the head.. didn't it just say describe anyway?

Reply 13

DnB_head

The TSR Star.

It must have been suggest. You cannot choose which one is more detrimental because it depends on the gene.

I think they were looking for you to say what oaktrees said.. I hope so anyway :smile:

Reply 14

neutrino!

8

DnB_head

Yeah, in the mutant fly, it has a pair of legs instead of antennae, because the Antp gene is switched on in the head.. didn't it just say describe anyway?

I think so, i just thought the question was a bit bizarre, not really connected with much. Eurghh i really did not like that exam all that revision on lac operon, brain and muscles gone to waste.... think ive just kissed my chance at getting an A goodbye! ah well... fingers crossed for a B :rolleyes:

Reply 15

Tacita

11

I thought the big questions were decent, but I hate hate HATED all the fly garbage. Completed messed up the epistasis section because, quite frankly, I didn't have a clue what it was going on about. The dopamine bit was rubbish too. I just hope the marks I got in the january modules are enough to limit some of the damage I did in today's paper :smile:

Reply 16

The TSR Star.

11

DnB_head

I think they were looking for you to say what oaktrees said.. I hope so anyway :smile:

I think it was a "suggest" question.

Reply 17

DnB_head

neutrino!

I think so, i just thought the question was a bit bizarre, not really connected with much. Eurghh i really did not like that exam all that revision on lac operon, brain and muscles gone to waste.... think ive just kissed my chance at getting an A goodbye! ah well... fingers crossed for a B :rolleyes: