Biology P51

[Komail Sabba']

ooops then i wrote something and explained sth else *facepalmed* i hope they go blind while reading this :/
the conversion part i mean is as i remember they said we have a 1 mgcm-3 subtilisin
and we need to prepare different conc ranging from 20 ugcm-3 - 100 ugcm-3
i forgot doing this and just made conc 0.8, 0.6, 0.4, 0.2 all in mgcm-3

i made them all in mgum-3.. but idk if it's accepted. let's hope no stupid silly marks are lost

 

[oahmed64]

[QUthat's Senorita.K, post: 916533, member: 143857"]when you are using serial dilution method you dont have to use any formula
c1v1=c2v2 formula is used for normal dilution(dilution other than serial dilution) , you can never use this formula for serial dilution because serial dilution means just halfing the concentration [/QUOTE]
No that's not true since there are different types of serial dilution

 

[oahmed64]

Guys how many marks will I lose for halving the concentrations?

 

[salma_69]

i made them all in mgum-3.. but idk if it's accepted. let's hope no stupid silly marks are lost

yeah i hope they accept a lot of methods

 

[Senorita.K]

[QUthat's Senorita.K, post: 916533, member: 143857"]when you are using serial dilution method you dont have to use any formula
c1v1=c2v2 formula is used for normal dilution(dilution other than serial dilution) , you can never use this formula for serial dilution because serial dilution means just halfing the concentration

No that's not true since there are different types of serial dilution[/QUOTE]
oh i didnt know that there are different types of serial dilutions
i have been taught in school that we never use c1v1=c2v2 formula for serial dilution

 

[Senorita.K]

Guys how many marks will I lose for halving the concentrations?

why will you lose marks for halving the concentration?
this method is correct,isnt it?

 

[salma_69]

anyways it's only 3 marks and i guess you get marks when mentioning using distilled or deionised water and stirring
so if in case we lose or sth it will be 1 mark i guess hopefully

 

[Komail Sabba']

Guys how many marks will I lose for halving the concentrations?

you may not lose at all..

 

[krishan sarna]

exposure to alcohol?

i think it was the group of babies who's mothers drunk and the other group of babies who's mothers did not drink during pregnancy

 

[krishan sarna]

what were the dependent and indpendent variables for the first question?

Dependent variable was the time taken to remove the gelatin
independent was the concentration of the enzyme

 

[alexkay]

hey guys I'm really worried do you have to state the pH your using ?

 

[krishan sarna]

hey guys I'm really worried do you have to state the pH your using ?

i dont think so because a buffer was already present in the cleaning solution, but for a control variable I referred to the thickness of the gelatin being used being uniform for all experiments.

 

[alexkay]

i dont think so because a buffer was already present in the cleaning solution, but for a control variable I referred to the thickness of the gelatin being used being uniform for all experiments.

I said that as well for the control