Biology paper 11 gt

[GCE As and a level]

Process least affected is diffusion, minimum number of membranes for carbon dioxide is 4 and oxygen 5

For the transpiration question, all of the options besides evaporation of water from air spaces were correct. So mass flow in xylem is correct.
The least process affected was diffusion.
The structure coded for by DNA was the primary structure, the sequence of amino acids in the polypeptides of haemoglobin, as genes on the DNA strand code for the amino acids forming the polypeptide.
Thte minimum membranes were 4 and 5.

Diffusion is 100 % wrong guys , It is the most process that is affected and i am sure of it
I read it some where but i cant remember where :s

 

[malk mohamed]

what about the Q of chitin

 

[Princess1997]

what about the Q of chitin

i think it is was both hydrolysis

 

[Princess1997]

does anybody remember question 2

 

[GCE As and a level]

does anybody remember question 2

i think it was about the cristae where it is found, in ER or Golgi body or Mitochondria ?
the correct answer is A(1 and 2)
but i did it wrong :s

 

[Karim Nabil]

GUYS what was the answer for
1- Which process is the least affected by a change in the fluidity of the membrane ?
2-What is the MINIMUM number of membranes that are crossed by oxygen and carbon dioxide molecules ?
3-some thing about the hemoglobin protein structure ( I think that which of the protein structures of the hemoglobin are codded by DNA or some ting like this )

1- endocytosis
2-4,5
3-primary structure

 

[Princess1997]

i think it was about the cristae where it is found, in ER or Golgi body or Mitochondria ?
the correct answer is A(1 and 2)
but i did it wrong :s

SHOULD NOT BE THE MITOCHONDRIA AND ER

 

[Gummy Beat]

For the process least affected i wrote down active transport. But now that i think about it active transport uses protein channels that can move in the cell membrane(fluid mosaic remember). Thus (i think) if the fluidity decreases, the protein channels movement decrease and active transport becomes easier. I think its endocytosis. Becauses diffusion and osomosis are basically the same so both answers are cancelled out : /

 

[Gummy Beat]

i think it was about the cristae where it is found, in ER or Golgi body or Mitochondria ?
the correct answer is A(1 and 2)

I am 100% sure it said cisternae not crista, since crista are the inner folded membrane of mitochondira

 

[Gummy Beat]

What was the answer to the TB question? I dont remember TB being able to stay in body cells anywhere in any of my books/notes (although it says at later stages it goes to the brain :0)

 

[Gummy Beat]

It was C , the only option that didn't mention 80S ribosomes because neither of the 3 have them.

Wait what ? Wasn't it A the option that says both both chloroplast and mitochondria have circular DNA.

 

[GCE As and a level]

1- endocytosis
2-4,5
3-primary structure

r u sure of ur answers ???

Oh shit i did them all wrong :s

 

[Karim Nabil]

r u sure of ur answers ???

Oh shit i did them all wrong :s

yes, but after checking, it was active uptake instead of endocytosis
otherwise all are correct

 

[Gummy Beat]

yes, but after checking, it was active uptake instead of endocytosis

Oh dear god! are you serious I thought it was gonna be endocytosis 0_o
BTW for the chlorplast and mictochondira question, wasnt the answer A that said both are prokaryotes and both have circular DNA.

 

[Karim Nabil]

Oh dear god! are you serious I thought it was gonna be endocytosis 0_o
BTW for the chlorplast and mictochondira question, wasnt the answer A that said both are prokaryotes and both have circular DNA.

yes.. me too but i was fooled
answer was B

 

[carolina]

What question was that of the minimum membranes? does anyone know what number it was more a less, if it was in the first half or second. i think i totally missed it

 

[Gummy Beat]

What question was that of the minimum membranes? does anyone know what number it was more a less, if it was in the first half or second. i think i totally missed it

It asked for the minimum number of cell membranes the oxygen and carbon dioxide have to pass through between blood in capillaries and air in alveolus. I dont remember the question number though

 

[Autumngirl]

Oh dear god! are you serious I thought it was gonna be endocytosis 0_o
BTW for the chlorplast and mictochondira question, wasnt the answer A that said both are prokaryotes and both have circular DNA.

Endocytosis occurs when the cell membrane flows around the particle it wants to engulf which is only possible if the membrane is free to move about, that is, it has to be fluid. As for the other question, it can only be C because all other options mentioned 80s ribosomes to be present in either the mitochondria, chloroplasts or prokaryotes which is wrong. All 3 have 70s ribosomes.

 

[Wolfgangs]

What about the effects increasing the efficiency of active transport? What was the answer?

 

[Karim Nabil]

What about the effects increasing the efficiency of active transport? What was the answer?

remind me with the options :O