A level Biology: Post your doubts here!

[ali danish]

Can some one plss expalin these??
H]

 

[ali danish]

would someone mind explaining to me the relationship between solute potential and water potential????

 

[help pls]

Can some one plss expalin these??
View attachment 60991 View attachment 60992 View attachment 60993 View attachment 60994 View attachment 60995 H]

1-c,12-c,15-dont know,16-c,22-b

are the answers correct?

 

[help pls]

HELP

dna molecules have hydrogen bonding,N-H bonding which needs high temperature and very different ph for example 2 or 12 to get this bond break,

but rna have no n-h bonds and there for it can be easily broken down,and rna needs to be broken because extra proteins is not supposed to be formed,

but on the other hand DNA is very much important and is not supposed to be broken down so easily.

hope this helps

 

[help pls]

View attachment 60961
can someone explain this

B is the answer,we know that A binds with T and C binds with G,

therefore first we need to notice that which two columns have ALMOST same number of nitrogenous bases.
we can conclude that B and C have almost same number of bases.to support this they have taken an rna which contains uracil.so instead of T uracil will bind with A.therefore we can see that column c is empty in sample three and uracil is present,this states that column c is T and column B is Adenine!!

hope this helps.