A level Biology: Post your doubts here!

[Hisham Khan]

Primary contains covalent wait .. no they dont so ..

 

[SohaibButt]

How do we define chromatin??

Single strand of dna

 

[SohaibButt]

Primary contains covalent wait .. no they dont so ..
View attachment 63928

It is right boz no water enters or leave so no pressure

 

[Hisham Khan]

I meant this question.What has covalent bond to do with primarty isint it amide bonds

 

[Hisham Khan]

 

[SohaibButt]

I meant this question.What has covalent bond to do with primarty isint it amide bonds

No peptide is covalent

 

[Hisham Khan]

why not other options

 

[SohaibButt]

View attachment 63930
why not other options

Man if we have to study phospholipids bilayer then it can only be seen by eletron

 

[Hisham Khan]

Important question

 

[Hisham Khan]

.

 

[Tajrina Promela]

Why is the answer not A?

 

[Hisham Khan]

Man if we have to study phospholipids bilayer then it can only be seen by eletron

yes but why not neucleolus etc

 

[SohaibButt]

Why is the answer not A?
View attachment 63932

C?

 

[Hisham Khan]

Why is the answer not A?
View attachment 63932

because 1 is for reducing sugar.They didn't add hcl and neutralize which is necessary for non reducing

 

[SohaibButt]

yes but why not neucleolus etc

Their size is larger

 

[SohaibButt]

Why is the answer not A?
View attachment 63932

What's the answer?

 

[Tajrina Promela]

They boiled with acid. The answer is C

 

[Hisham Khan]

OH Sorry I didn't read the question properly.Answer I think is B cause both non reducing and reducing give brick red so their isint enough evidence for presence of reducing.Hope you get it

 

[Hisham Khan]

They boiled with acid. The answer is C

I dont think so ..

 

[SohaibButt]

They boiled with acid. The answer is C

But colour doesn't change so reducing present