A level Biology: Post your doubts here!

[Hisham Khan]

can u explain abit more in details?

Sugar taken out from sink ,so solute potentiol increases water potention decreases

 

[Hisham Khan]

No one replies for me ... ok I'll stop answering

 

[Hisham Khan]

DNA has 2 strands so:
120÷2= 60
60÷3= 20 amino acids
'A'

Why you divide by 3?

 

[angryrider_56]

Why you divide by 3?

1 codon has 3 bases.....1 anticodon has also 3 bases which when pairs with it's complementary codon bases release 1 amino acid only.

 

[SohaibButt]

No one replies for me ... ok I'll stop answering

No plsss ask!!!!

 

[Hisham Khan]

1 codon has 3 bases.....1 anticodon has also 3 bases which when pairs with it's complementary codon bases release 1 amino acid only.

Thanks I made a silly mistake haha

 

[SohaibButt]

Can anyone tell the change in structure of phospholipid when temperature increase n decrease

 

[Tajrina Promela]

Can anyone tell me why 23 is C?

 

[Hisham Khan]

Can anyone tell me why 23 is C?

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14 iss A as water is obviously a control with no enzyme conc,the independent variable

 

[Hisham Khan]

has anyone done any MCQ related to cell signalling?

Quite alot yes

 

[Hisham Khan]

Can anyone tell me why 23 is C?

View attachment 63890 View attachment 63891

C because spindle fibres contract and pull the chromosomes...

 

[potatocorn12]

oh wow i havent seen any even tho i did tons of papers,btw what sort of questions are they like what do they ask?

Quite alot yes

 

[Hisham Khan]

oh wow i havent seen any even tho i did tons of papers,btw what sort of questions are they like what do they ask?

Well questions have come asking for naming of signalling molecules and process which happen during signalling etc

 

[Hisham Khan]

oh wow i havent seen any even tho i did tons of papers,btw what sort of questions are they like what do they ask?

how many papers you did roughly?

 

[potatocorn12]

how many papers you did roughly?

from 2004 to 2018 but for the latest years i just did varient 2

 

[SohaibButt]

Can anyone solve o/N/07/p1/q1 I'm seriously not getting its answer..

 

[Hisham Khan]

from 2004 to 2018 but for the latest years i just did varient 2

I almost got a heart attack when you said from 2002 to 2018 lol.Instead of doing 2002 papers you should have just done
2012-2018 papers all varients like me

 

[Hisham Khan]

Can anyone solve o/N/07/p1/q1 I'm seriously not getting its answer..

Measure lenght of scale bar.Change into micrometers.Divide this value by scale bar actual lenght which is 2NM BUT CHANGE 2NM INTO MICROMETERS WHEN DIVIDING IT BY MEASURED LENGHT OF SCALE BAR

 

[potatocorn12]

2004 not 2002 ,btw i started doing them in february so i thought i will have enough time and practice,(the more the better) but honestly 2004-2009 ones are easy af like i get 39 or 40 in them,but recent years i get maximum 36..Are 36/40 (i messed up in my p3)

I almost got a heart attack when you said from 2002 to 2018 lol.Instead of doing 2002 papers you should have just done
2012-2018 papers all varients like me

 

[Hisham Khan]

2004 not 2002 ,btw i started doing them in february so i thought i will have enough time and practice,(the more the better) but honestly 2004-2009 ones are easy af like i get 39 or 40 in them,but recent years i get maximum 36..Are 36/40 (i messed up in my p3)

I started doing them in late march,silly me .I got 36/40 in latest paper.