AS Biology P1 MCQs Preparation Thread

[joanna omar]

June 04 ---> Q7 - Q19
Nov 04 ---> Q25
June 05 ---> Q11 -
Nov 05 ---> Q20 - Q24 - Q33 - Q38

 

[Sarah_3420]

Guys im finiding paper 1 so tough. i am repeating it this year and i still have it as a big problem any tips?

 

[joanna omar]

Guys im finiding paper 1 so tough. i am repeating it this year and i still have it as a big problem any tips?

Same here :/

 

[Princess Raven]

guys oct 2008 question 18... can someone explain plz

 

[Princess Raven]

the answer is A. because cell x is a squamous epithelium and y is a ciliated cell and z is cartilage.. alveoli only have squamous epithelium cells

Hey anyone can help?
June 2004 q33

 

[yubraj]

http://papers.xtremepapers.com/CIE/...l A and AS Level/Biology (9700)/9700_s06_qp_1
someone please help in. q: 8,16,17,20,23,22,24 and 25.

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s06_qp_1
someone please help in. q: 8,16,17,20,23,22,24 and 25.

8 should be D coz Starches do not react or react very poorly with Benedict's reagent, due to the relatively small number of reducing sugar moieties, which occur only at the ends of carbohydrate chains

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s06_qp_1
someone please help in. q: 8,16,17,20,23,22,24 and 25.

16 should be C coz larger the size of molecule lesser is diffusion same with diffusion.
Concentration gradient means movement of solute from high concentrated solution to low concentrated solution and diffusion is down concentrated gradient so no affect on it.

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s06_qp_1
someone please help in. q: 8,16,17,20,23,22,24 and 25.

Humidity means it is a quantity that represents the amount of water vapour present in atmospheric air.
The answer is B coz more humidity means more water vapour present in atmosphere means less loss of water vapour from plants.

 

[princess Anu]

please explain why A and not D?

 

[cool Hassan]

please explain why A and not D?View attachment 51371

"resting" muscles means that the partial pressure of O2 is high and partial pressure of Co2 is low, which means there will be no Bohr's shift. So B and C are blunder..
Now as we know that HB realeases the oxygen when partial pressure of Co2 is high and partial pressure of O2 is low... so in resting muscle very less oxygen is released Hence the Ans in A.
If the statement was what is the %age saturation of HB when blood passes through an actively respiring muscle, the Answer would have been "C"..
Hope this Helps...

 

[cool Hassan]

Btw whats is the average score in P1 of u guys???

 

[princess Anu]

"resting" muscles means that the partial pressure of O2 is high and partial pressure of Co2 is low, which means there will be no Bohr's shift. So B and C are blunder..
Now as we know that HB realeases the oxygen when partial pressure of Co2 is high and partial pressure of O2 is low... so in resting muscle very less oxygen is released Hence the Ans in A.
If the statement was what is the %age saturation of HB when blood passes through an actively respiring muscle, the Answer would have been "C"..
Hope this Helps...

sorry the answer given is D and my question is why not A

 

[cool Hassan]

sorry the answer given is D and my question is why not A

Still then ans is D its just that there will be no bohrs shift... Arguments will the same with just a mere change that at body cellular level haemoglobin nearly looses all O2 and if it is an actively respiring muscles where partial pressure of CO2 is too high then Bohr's shift occurs and tgen the ans is C

 

[princess Anu]

does that imply that be it a actively respiring or resting tissue, the % saturation has to be low and haemoglobin has to lose 50% of its oxygen no matter it is a actively respiring or a resting tissue?

Still then ans is D its just that there will be no bohrs shift... Arguments will the same with just a mere change that at body cellular level haemoglobin nearly looses all O2 and if it is an actively respiring muscles where partial pressure of CO2 is too high then Bohr's shift occurs and tgen the ans is C

 

[cool Hassan]

does that imply that be it a actively respiring or resting tissue, the % saturation has to be low and haemoglobin has to lose 50% of its oxygen no matter it is a actively respiring or a resting tissue?

yes!

 

[Karim Nabil]

>_< ??

 

[mushu.jr]

Help

 

[jessica platten]

Hi , The answer in the ms is C but my ans is B . Why is it wrong?

 

[fatima imtiyaz]

I have a question regarding eye piece graticule: 9700_s15_qp_11 question 3
please help!!