A level Biology: Post your doubts here!

[SohaibButt]

Concentration is always consectively halfed of the previous conc of volume in serial dilutions so A.Serial dilution came in paper 34 As well I guess
20: Answer D

After cytokineses each dna divided into two daughters cell so it should be 1?

 

[SohaibButt]

Sorry I don't get you.The concentration is halved each time so answer is A.Simple

There is another kind of dilution in which we make different concentration like 8, 6, 4 etc...

 

[Hisham Khan]

There is another kind of dilution in which we make different concentration like 8, 6, 4 etc...

That is simple dilution.How did you practicals go btw ?

 

[SohaibButt]

That is simple dilution.How did you practicals go btw ?

Ohkay thanks!! I just mixed up those terms

 

[SohaibButt]

After cytokineses each dna divided into two daughters cell so it should be 1?

Plz can u explain me last one? Why it is still 2 after cytonkinesis

 

[Hisham Khan]

Why is the answer A.Can anyone help me ????.Why is 1st diagram unsaturated wth?

 

[SohaibButt]

Why is the answer A.Can anyone help me ????.Why is 1st diagram unsaturated wth?
View attachment 63839

Carbon to carbon double bond is formed when there is less hydrogen so saturated carbon forms double bond

 

[Hisham Khan]

Plz can u explain me last one? Why it is still 2 after cytonkinesis

They are talking about cells at START of cytokinesis so each cell still contain 2 dna molecule in 1 chromosome in 2 chromatids maybe not sure

 

[SohaibButt]

They are talking about cells at START of cytokinesis so each cell still contain 2 dna molecule in 1 chromosome in 2 chromatids maybe not sure

Thanks dude

 

[Hisham Khan]

Carbon to carbon double bond is formed when there is less hydrogen so saturated carbon forms double bond

Any other question?.I am having a good revision and am in desperate need of some

 

[SohaibButt]

Any other question?.I am having a good revision and am in desperate need of some

Yeah I'll upload in a while n that's good

 

[Hisham Khan]

Thanks dude

Can you help me with this q 36?

 

[SohaibButt]

Can you help me with this q 36?

It's 10?

 

[Hisham Khan]

 

[SohaibButt]

View attachment 63840

B?

 

[Hisham Khan]

A?

Answer is C.
THE thing I'm confused about is why was tourism correct in the previous question because malaria isin't a transmissible disease and in prev mcq they said tourism has social effect and the q is why does it have a social impact which makes it harder to control in the prev question ..

 

[SohaibButt]

Answer is C.
THE thing I'm confused about is why was tourism correct in the previous question because malaria isin't a transmissible disease and in prev mcq they said tourism has social effect and the q is why does it have a social impact which makes it harder to control in the prev question ..

Poverty n overcrowded is cause of TB

 

[SohaibButt]

Answer is C.
THE thing I'm confused about is why was tourism correct in the previous question because malaria isin't a transmissible disease and in prev mcq they said tourism has social effect and the q is why does it have a social impact which makes it harder to control in the prev question ..

It can be transmitted like in my prev question cholera was right

 

[Hisham Khan]

Poverty n overcrowded is cause of TB

I know.
I was saying in some other past paper they said tourism was correct for malaria because it becomes difficult to control,NOT in this question,in this q,tourism option is wrong for malaria
malaria CANT BE TRANSMITTED like tb so that doesent make sense for the prev I solved before this one

 

[Hisham Khan]

It can be transmitted like in my prev question cholera was right

Maybe malaria can be transmitted by blood transfusion from tourist maybe but then A should have been correct in this question as well.nvm post other questions