Biology Paper 22 Discussion thread.

[UFO_far_planet]

@ robinhoodmustafa, wikipedia says it's fermentation: http://en.wikipedia.org/wiki/Production_of_antibiotics
BTW, I am new here.

 

[mohdumar]

robinhoodmustafa i think they r right!!! fermentation after all!!

 

[robinhoodmustafa]

robinhoodmustafa i think they r right!!! fermentation after all!!

@ robinhoodmustafa, wikipedia says it's fermentation: http://en.wikipedia.org/wiki/Production_of_antibiotics
BTW, I am new here.

There can be more than One Term. For eg If We are Cleaning Dirty Water than We can Call it "Recycling of water" , Desalination Or Reverse Osmosis...

 

[capslo]

i wrote "LARGE-SCALE PRODUCTION"

 

[zohra`xo]

i have lost about 15 marks.So i think i should leavee my hopes for an A*,,.

Hum aik hi kashti mein sawaar hain.

 

[*Anonymous*]

Hum aik hi kashti mein sawaar hain.

Yeah... kash hum dono A* ki kashti mein sawari ke mazze le rae hote... Ab Grade threshold aur bio p1 pe depend karta hai...

 

[mohdumar]

There can be more than One Term. For eg If We are Cleaning Dirty Water than We can Call it "Recycling of water" , Desalination Or Reverse Osmosis...

yeah, but biotechnology suddenly seems too generic a term

 

[devilmaycryred]

true
.true...but it isnt wrong to write viral infection in ur answers....anyway....i think that the following organs are acceptable
Stomach/Liver/Pancreas/Lungs, Organs like heart and intestine are not acceptable

what about kidneys man ?

 

[thementor]

what about kidneys man ?

no.......kidneys are not acceptable.....if the marking scheme is highly generous, then they may accept it otherwise kidneys isnt right...

 

[Fahm E Deen]

What is the threshold for A* this time ? Any ideas guys ?? nd in the very last question if the two parts are described oppositely ( Sperger - Nutrients and Nutrients-Sperger ) will CIE allow partial credit..

 

[zohra`xo]

Yeah... kash hum dono A* ki kashti mein sawari ke mazze le rae hote... Ab Grade threshold aur bio p1 pe depend karta hai...

Haha, Insh'Allah, buss ab du'a hi kar saktay haaiin!

 

[Haris Sal11]

Commercial lupins are produced sexually so they have greater colour variations and have more viable seeds, as opposed to wild lupins which are asexually reproduced...or maybe it was the other way round. I can't remember the question. It could've been cross and self pollination (but that was in the greenhouse question)...I really can't remember

Wrote the same thing. I need to confirm one thing. The 7 mark question above it. I wrote every condition required except that I added that plants are protected from Sexual reproduction. Insects are kept away so pollination doesn't occur. Wrong?

 

[Haris Sal11]

li
liver and lungs is absolutely correct

What about Liver and Kidney?

 

[Haris Sal11]

True dat. Selective Breeding was not the ONLY thing i wrote in my answer by the way

Wrote selective breeding as well. But I ended by saying that when the desirable traits are formed in a generation, they are made to reproduce asexually to get the same qualities by Mitosis. Right?

 

[Haris Sal11]

I

Organ B was Kidney.

Differences in the contents of renal artery and ureter respectively:

1)Glucose present, glucose absent,
2)Amino acids present, amino acids absent,
3)relatively less urea uric acid and creatinine, the contrary in other column
4)white blood cells present, W.B.Cs absent.

J was the inlet war pouring the micro-organism culture mixed with nutrients like ammonium sulphate glucose etc/
L was the sparger that blows sterile oxygen in the fermenter for aerobic respiration of the micro-organisms.

I wrote More Glucose, Less Glucose.
More Urea, less urea.
More Amino acids, less amino acids. Am I fucked?

 

[thementor]

I

I wrote More Glucose, Less Glucose.
More Urea, less urea.
More Amino acids, less amino acids. Am I fucked?

two pints are wrng.....u cannot say that glucose and amino acids were present in urine, bcoz that's wat u r saying when u say more and less...since the quesion specified that a healthy person's differences were to be mentioned, you cannot say more and less.

 

[thementor]

Wrote selective breeding as well. But I ended by saying that when the desirable traits are formed in a generation, they are made to reproduce asexually to get the same qualities by Mitosis. Right?

partially....but not compeletely...since it was a 5 mark question 2 -3 marks may be deducted.

 

[thementor]

What about Liver and Kidney?

Liver is correct....but not kidney......

 

[Haris Sal11]

Liver is correct....but not kidney......

Clear another query. That 7 marks question. I wrote all the essential conditions. I ended it by saying plants are protected from reproducing sexually. Insects are kept away to prevent pollination.

 

[thementor]

What is the threshold for A* this time ? Any ideas guys ?? nd in the very last question if the two parts are described oppositely ( Sperger - Nutrients and Nutrients-Sperger ) will CIE allow partial credit..

On misreading a question a mark value known MSR-2 is awarded...so if it is a 5 mark question, the examiner may award 1-2 marks...