Biology; Chemistry; Physics: Post your doubts here!

[sweet fairy]

now rukfard just sounds like fart xD

yes u better not! i am just me!

 

[sweet fairy]

best of luck to you both

thankew!

 

[Anon]

@Kingtard: OK!

 

[sweet fairy]

LOL! x'D

 

[shariq123]

I have a few questions
First of all if you have the Federal Biology book
Please go to Chapter 5 Nutrition Pg. 67
Test Yourself 5.2 and 5.3
From 5.2 I odnt understand 1C and fromm 4.3 I dont understand a-g ( dont need to sketch the graph)

Next from chapter 9 Digestion
Pg. 93
Investigation 6.3
I dont understand 1b, 3, 4, 5a-c

I would appreciate it if someone could help

Next there is a MCQ from the past papers that i dont understand
it is as follows :

Q. 10 cm^3 of 1% starch suspension was incubated with 10 cm^3 of a 10% amylase solution for five minutst at 37 celcius. Samples were then tested with iodine solution and with benedict's solution, What are the expected results for each?

Color with Iodline Solution: Black or Brown
Color with Bendicts slution- blue or brick-red?

Please explain with the answer

Thanks

 

[VelaneDeBeaute]

For 5.2 c, itx easy! The tube initially contains 10% glucose solution with water outside! Replacing water with 25% glucose would mean that water would leave the visking tube by the process of osmosis and the tube would shrink! The level of solution in beaker would rise too!

 

[shariq123]

Thanks
Btw I meant to say 5.3

 

[VelaneDeBeaute]

^ For a-g parts?

 

[shariq123]

yes do you know the answers please?

 

[Anon]

A strange problem I have here. its s11/p42

See the question

Now look,
question ask us about mass, (which ought to be in grams)
but the answer blamk is being followed by a "cm^3" unit

why is this?
Anyone?

 

[Silent Hunter]

this is my chemistry paper......... the one i gave..... its june 11 znt it?

its wrong....

 

[SalmanPakRocks]

Yeah! I think Mass is always measured in Grams!

 

[Silent Hunter]

there were i think two mistakes....... at another place they had required volume and given mass units i think..... i.e. opposite units

 

[Anon]

Just remembered My sis too gave this paper,
I asked her, and she told me that it was a mistake in the paper,

They shouldnt make such mistakes... I got confused!

BTW, tomorrow is ATP both chem and phy

 

[Silent Hunter]

best of luck for that

hope you do very well

 

[anahita16]

All the best!

 

[Anon]

Thank you both..

 

[Anon]

I havent, thanks!

 

[sweetiepie]

anytym even da bio one did u get it

 

[Anon]

I am not appearing fot Bio..
Only physics and Chem