A level Biology: Post your doubts here!

[♣♠ Magnanimous ♣♠]

It's D.. right?

why?

 

[maq1996]

Think about it this way. 3 and 5 are both plasmolised cells so they should be in the same concentration, right? Now there's a high concentration and a low concentration sucrose solution. In the high concentration solution there's less water potential so the water would leak out through osmosis from higher wp to lower wp so both 3 and 5 should be in the more concentrated sugar solution

 

[♣♠ Magnanimous ♣♠]

Think about it this way. 3 and 5 are both plasmolised cells so they should be in the same concentration, right? Now there's a high concentration and a low concentration sucrose solution. In the high concentration solution there's less water potential so the water would leak out through osmosis from higher wp to lower wp so both 3 and 5 should be in the more concentrated sugar solution

ok...

 

[Sarah_3420]

Any one taking P5 the coming friday?

I am do you have any notes or so? :/

 

[sumeru]

Any one taking P5 the coming friday?

Count me in.....p5 variant 2

 

[VelaneDeBeaute]

Does methylene blue stain the DNA/chromosomes if mitosis is to be observed under a microscope?

 

[muhammad05]

Wht did u put? Competetive inhibitor?

Yeah and I COMPLETELY forgot about protein synthesis for the how are enzymes made part.

 

[BeBeskii108]

All variants. paper 2

 

[♣♠ Magnanimous ♣♠]

 

[maq1996]

Is it A?

 

[ZaqZainab]

View attachment 41533

A ?

 

[♣♠ Magnanimous ♣♠]

Is it A?

A ?

how to identify it? why A

 

[ZaqZainab]

View attachment 41533

C and D can't be the answer as 3 is xylem vessels and they contain a lot of water
so the most water potential would be 3 that is least negative

 

[maq1996]

Look 3 is xylem so it's gonna have the highest water content. So it's less negative than all the other cells. That solves the problem

 

[♣♠ Magnanimous ♣♠]

Look 3 is xylem so it's gonna have the highest water content. So it's less negative than all the other cells. That solves the problem

thanks

C and D can't be the answer as 3 is xylem vessels and they contain a lot of water
so the most water potential would be 3 that is least negative

thanks.

 

[ZaqZainab]

What are you doing magnanimous

 

[♣♠ Magnanimous ♣♠]

What are you doing magnanimous

hahahaahaha... nothing

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_s13_qp_12.pdf
Q14

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s13_qp_12.pdf
Q14

I am too confused in that question.

 

[ZaqZainab]

I am too confused in that question.

I hate CIE