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ALL CIE BIOLOGY DOUBTS HERE !!!

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NidZ- Hero:
I have couple to ask For p1

What substances dissolve phospholipids

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w07_qp_1.pdf
Question 14 ,22 ,29 ,35



THANKS

Amelia:
35 - Antibiotics cure bacterial diseases. Cholera and Tuberculosis. So, ans is A.

29 -  Systolic blood pressure represents the maximum pressure exerted when the heart contracts. So, its C.

22) - complementary base pairing along some of its length
  - an area that can attach to a ribosome
   -a site to which a specific amino acid attaches

All describing tRNA. Ans, D.

14) - A. http://ccnmtl.columbia.edu/projects/biology/lecture7/images/ncinhgra.jpg


 - Lipids can be dissolved with the use of organic solvents like alcohol.

**RoRo**:
Can anyone please explain to me how do you go about Q22, the answer is B.
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w10_qp_11.pdf

& explanation for Q 17, 30 and 34 of this paper:
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_s06_qp_1.pdf

as well as Q14 & 18 in June 2002 and Q26 & 32 in Nov 2002 [I can't find online links for both these papers, sorry]

Thanks! :)

Aadeez || Zafar:
22) if u would look closely then % of nitrogenous base of A--D and B--C would be (almost) equal so this tells that A--D is a pair and B--C is another pair,

now look at Uracil when the uracils is present , C is nil then this shows that C is Thymine and as C is paired with B, B is Adanine

17) i m confused too but i think the A is correct as C and D sound senseless as water would entre cell so the water potentail of cell would increas (more +Ve) and water poteintial of solution decreases (more -ve) and the solute potential would also increase with water potential as

water potenial in plant cell = pressue potenital + solute potenial

and thus to increase water potential (as the cylinder are diipped in solution with lessesr conce. (more water potenital) the pressure potenitial and solute potential should be increased

HOPE i m not confusing u

30)
i think it has to be C (not sure)
as
the ans = (2-1)+(4-3)

34)
HIV/AIDS caused by virus, malaria by parasites and TB by Bacteria
so , virus dont respire and dnot have ribosomes, Parasites dont have surface membrane

so the ans is D

**RoRo**:

--- Quote from: BabuRao GanpatRao Aaapte on June 04, 2011, 07:43:07 am ---22) if u would look closely then % of nitrogenous base of A--D and B--C would be (almost) equal so this tells that A--D is a pair and B--C is another pair,

now look at Uracil when the uracils is present , C is nil then this shows that C is Thymine and as C is paired with B, B is Adanine

17) i m confused too but i think the A is correct as C and D sound senseless as water would entre cell so the water potentail of cell would increas (more +Ve) and water poteintial of solution decreases (more -ve) and the solute potential would also increase with water potential as

water potenial in plant cell = pressue potenital + solute potenial

and thus to increase water potential (as the cylinder are diipped in solution with lessesr conce. (more water potenital) the pressure potenitial and solute potential should be increased

HOPE i m not confusing u

30)
i think it has to be C (not sure)
as
the ans = (2-1)+(4-3)

34)
HIV/AIDS caused by virus, malaria by parasites and TB by Bacteria
so , virus dont respire and dnot have ribosomes, Parasites dont have surface membrane

so the ans is D

--- End quote ---

Thank you, and your answers are right By the way! xD

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