AS Biology P1 MCQs Preparation Thread

[ShootingStar]

please reply

 

[Noor Ahmad]

q40 please.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w12_qp_11.pdf

 

[Noor Ahmad]

Question 27
http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w10_qp_12.pdf

 

[Sarah_3420]

paper 1 biology is horrible ! i lose so much marks in it and idk wut to do ! no matter how much i practice

 

[KWIKIW]

How does increase in cholesterol increase fluidity of the plasma membrane?
http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w12_qp_12.pdf
Qs 16

 

[Student12]

How does increase in cholesterol increase fluidity of the plasma membrane?
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w12_qp_12.pdf
Qs 16

Cholestrol maintains the fluidity of the membrane.. you just need to remebere.. but at times when the bilayer is given and they ask wht maintains it and the option correct are usually phospholipid and the protein.. if you or someone could help?!

 

[Sara syed]

pls explain s12 qp12 question 21 and 30
w12 qp11 qs 4 and 17
w10qp13 question 38

 

[Sara syed]

if cholestrol makes cell surface membrane more fluid than what component of membrane reduces its fluidity

 

[imperial]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w12_qp_11.pdf

explain question 40

 

[Bluejeans#]

Ohh, I get it! You see on this diagram where the arrow points to 'hinge region'? Just draw a lines thru the solid bonds nest to the dotted hinge region. The molecule is now broken down to three fragments, and there are still two variable regions where the antigen can bind. I know my explanation's childish, but I hope it helps

thankyouuu bt where r dose 2 variable regions?

 

[Student12]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_s12_qp_11.pdf
Q16(C), 39(C) HELPP ! Could someone explain?

 

[sweetjinnah]

plz help me in this mcq 1: http://papers.xtremepapers.com/CIE/...and AS Level/Biology (9700)/9700_w06_qp_1.pdf
nd i hav a qts is lysosome present in plant cell??

 

[fishcook]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w12_qp_12.pdf
Q10. Can someone explain why it's C and not A?

 

[Student12]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w11_qp_12.pdf
Q5(B), 20(C) , 23(C)

Someone helppp !

 

[imperial]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w12_qp_12.pdf
Q10. Can someone explain why it's C and not A?

Some amino acids forms special bonds, if it's changed, then the bond which holds the normal the shape will be affected , so it will no longer have the same shape and thus secondary and tertiary shape is affected.

 

[imperial]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s12_qp_11.pdf
Q16(C), 39(C) HELPP ! Could someone explain?

16

Diffusion doesn't need energy, active transport needs energy, when the nitrogen gas is bubbled, the animal cells cannot respire so there is no energy, active transport cannot take place without energy, in the nitrogen gas graph it shows 3-carbon sugar is still absorbed but 6-carbon sugar is not.

 

[SalmaXXXX]

Could someone please explain to me these graphs? Q 14
and also how it would look if the amount of product formed on Y-axis and time on X-axis. It was a question in June 2002 but I can't find it here.

http://papers.xtremepapers.com/CIE/...and AS Level/Biology (9700)/9700_w07_qp_1.pdf

 

[rockerkunal]

help pleasssssssse!!

 

[SalmaXXXX]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w12_qp_11.pdf

explain question 40

All you have to do is to find the GGP of the tertiary consumer ( fourth trophic level) which is not shown here. First calculate the GGP for 2nd TL 23000- 8000 = 15000. Then calculate GGP for 3rd TL 15000 - 10500 = 4500. Then calculate GPP for 4rth TL 4500 - 4200 = 300. Now calculate the percentage 300/23000 x 100 = 1.3. Hope that was helpful

 

[Sara syed]

explain w11qp13 q 27