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AS Biology P1 MCQs Preparation Thread

fathimaash

fathimaash

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and one more some1 tell me da size of all organells in order startin from nuclei..
Thanx in advance
 
JulyMei

JulyMei

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jrahmed said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s10_qp_11.pdf

can some explain number 3...the ans is C
and number 38....the ans is A

thanks in advance
Click to expand...

Q3) the formula for area is pi(r)^2
40 divisions = 0.1 mm
1 division = 0.0025mm
50 divisions = 0.125mm = 125micrometer
apply the area formula: 3.14 x 125 x 125 = C

Q38) between 2 trophic levels, so.. 1300/10/10 = 1.3x10^1
between 4 trophic levels, so.. 1300/10/10/10/10 = 1.3x10^(-1)

Hope it helps. :)
 
HuN3yy !!

HuN3yy !!

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rogue94 said:
Malaria is caused by plasmodia (plasmodium is the parasite), which are carried by female Anopheles mosquitoes. These mosquitoes survive and breed in a hot enivironment with higher temperatures (such as the tropics). Also, the malarial parasite (plasmodium) requires temperatures above 20 degree Celsius to complete its life cycle within the mosquitoes (not within humans). Carbon dioxide causes global warming and global warming results in an increase in temperature in the lower atmosphere, spreading malaria to new areas (which were previously unsuitable due to lower temperature).
For the question itself: the statement related to migration is also correct. Only statement number 3 is wrong as antibiotics cannot be used against plasmodia (they are eukaryotic, whereas antibiotics can only be used against bacteria, which are prokaryotic).
Click to expand...
Thankuuuu sooo muchh ..it really helped !!! :)
 
J

jrahmed

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JulyMei said:
Q3) the formula for area is pi(r)^2
40 divisions = 0.1 mm
1 division = 0.0025mm
50 divisions = 0.125mm = 125micrometer
apply the area formula: 3.14 x 125 x 125 = C

Q38) between 2 trophic levels, so.. 1300/10/10 = 1.3x10^1
between 4 trophic levels, so.. 1300/10/10/10/10 = 1.3x10^(-1)

Hope it helps. :)
Click to expand...


so we had to find the area of the circle basically?

thanks a lot again
 
J

Just M

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Hi guys :D Why is nov11/p13 question 40 the answer is A not B ?? I thought mesophyll cell is the source ?? Mind explaining ?? Oh btw, i can't seem to find nov11 examiner report. Does anyone have a link to access it ?? THANKS ALOT :D
 
Haniya Khan

Haniya Khan

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aom

aom

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JulyMei said:
Q23) tRNA code is same as DNA. Just replace U to T.. So, the answer is B.. tRNA: CCU UCC UUC UCG , DNA: CCT TCC TTC TCG

Q24) C is thymine because when uracil appears, thymine disappear. so, find the number which is near as thymine (30, 24, 33). Hence, answer is B. because only adenine will have number which is near to thymine.

Q37) answer is C. 1 anitibody has 2 antigen binding sites. So, even when it hydrolysed(at hinge region) the binding sites are still there.. Therefore, there's 2 binding sites.

Hope it helps. :)
Click to expand...
u got 1 mistake q24 is B
 
Soldier313

Soldier313

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Just M said:
Hi guys :D Why is nov11/p13 question 40 the answer is A not B ?? I thought mesophyll cell is the source ?? Mind explaining ?? Oh btw, i can't seem to find nov11 examiner report. Does anyone have a link to access it ?? THANKS ALOT :D
Click to expand...
if this is helpful to u..please pray for me..thanx:)
 

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Haniya Khan

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