can any1 help with BIO mcq'zz plzzzz

[kanz123]

how to do this 1 ??

 

[kanz123]

and diss 1 ???

 

[sweetiepie]

which year??

 

[kanz123]

oct/nov 2005

 

[kanz123]

and dis 1 plzz ?

 

[mrpaudel]

21C

 

[sweetiepie]

how??

 

[lychee26]

21 answer is C right?

 

[mrpaudel]

for DNA sequence...and tRNA codon..the question is incomplete

 

[ShootingStar]

and diss 1 ???

This question is not complete. Re-post the complete question.

 

[sweetiepie]

hmm yeah ...
23.B
24.B

hope ur clear...

 

[mrpaudel]

@sweetiepie: jus look at the structure of DNA>.u will know urself..jus look at the linkage of nucleic acids...that is the way..!!

 

[sweetiepie]

ok thank u.....

 

[lychee26]

i don't get question 34 either.

 

[lychee26]

*24

 

[mrpaudel]

for the adenine one..the answer is B>..jus look at the % composition..like if A in sample 1 is 25..then Its complementart shud b at around this value..may b 23 or 24 or 25 or 26 or even 27....and jus look at the uracil..and for complementart...other shud b at around 25..which means...the answer is B...jus look at the question carefully..its easy!!

 

[mrpaudel]

which one are u talking bout, lychee26???

 

[lychee26]

which one are u talking bout, lychee26???

Question 24.

 

[ShootingStar]

For question 24..

Look at the % nitrogenous base of A--D and B--C , you'll notice that they are almost equal, which means that A--D is a pair and B--C is another pair.
Look at Uracil when it is present, C is nil then. This means that C is Thymine and since C is paired with B, B must be Adenine.

 

[lychee26]

oh okay. Thanks! and could you please tell me question 13 of may/June 10 paper 12 ?
http://www.xtremepapers.me/CIE/International A And AS Level/9700 - Biology/9700_s10_qp_12.pdf