Biology paper 52

[anonymous1122]

Genetic? I am not sure

n secondly why did the activity of amylase solution decreased in different extract in q1[/QUOTE

 

[samantha liyanage]

What did you guys write for the beta-amylase and gamma-amylase question? The one on the second page..with the 2 beakers?

 

[anonymous1122]

What did you guys write for the beta-amylase and gamma-amylase question? The one on the second page..with the 2 beakers?

Gamma hydrolysed all of the starch so brown colour of iodine. Negative for starch.
The other showed blue black since it was partially hydrolysed

 

[aka abdul]

the beta amylase I guess had greater area stained when the sample is observed under the microscope

 

[aka abdul]

what about the difference in activities of the amylase that was given in the table?

 

[samantha liyanage]

I wrote about different intensities of the blue-black color since not all the starch is hydrolyzed in one, and in the other all of it was hydrolyzed.

Then the intensity of the colour was measured using a colorimeter and compared.

Also bio-sensors and dipsticks could be used.. right?

 

[samantha liyanage]

what about the difference in activities of the amylase that was given in the table?

You mean the one with samples A to F ?

 

[aka abdul]

I compared areas of the region which was stained brown

 

[aka abdul]

You mean the one with samples A to F ?

yes

 

[samantha liyanage]

yes

I explained the trend,

that the area of brown zone decreases from sample A to F. This means the amylase concentration decreases, so thus the no. of repeats for the gene decreases from A to F.

Not sure if its right though I just couldn't think of any other explanations :/

 

[anonymous1122]

I wrote about different intensities of the blue-black color since not all the starch is hydrolyzed in one, and in the other all of it was hydrolyzed.

Then the intensity of the colour was measured using a colorimeter and compared.

Also bio-sensors and dipsticks could be used.. right?

If all of the starch is hydrolysed why would it show a blue black colour?

 

[anonymous1122]

I explained the trend,

that the area of brown zone decreases from sample A to F. This means the amylase concentration decreases, so thus the no. of repeats for the gene decreases from A to F.

Not sure if its right though I just couldn't think of any other explanations :/

I wrote Gene copy varies person to person. Coulnt think of any other

 

[Princess Raven]

What did u guys write for the independant variable??

 

[aka abdul]

I mentioned that amylase activity decreases due to difference in gene coding for the enzyme in different people

 

[anonymous1122]

What did u guys write for the independant variable??

Concentration of amylase solution

 

[samantha liyanage]

Crap.. iodine is used to test the presence of starch x_x

So if all the starch is hydrolyzsed, the solution should remain brown?

So I messed that one up then :')

 

[aka abdul]

What did u guys write for the independant variable??

concentration of amylase solution

 

[Bba321]

And dependent?

 

[samantha liyanage]

And dependent?

Area stained brown

 

[aka abdul]

what were the age groups in which variation of mean conducting velocity occurred?