stpm trial 2009 bio q&a (pcghs, penang)

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 For exa m . u se 1 Scale t o Name: Se c ti on A : [40 ma r ks] SMJK P e r e mp u a n C hin a Pulau P i n a ng ST P M Trial Examin a t i o n 2009 B I OLOGY Paper 2 Time : 2 Yo hours Answer all the que stions in this section . 100 % Pap e r 1 x2 Paper 2: Sect i on A Sect i on B Ting . U 6S _ 1 . Table 1 . 1 bel ow shows t he relative amounts of bases adenine , th y m i ne, guanine and cy t osine in DN A from different organisms . Source Adenine Thymine Guanine Cy tosine Bacterium 23.8 23.1 26.8 1 26 . 3 Maize 26.8 27.2 22 . 8 1 23 . 2 Drosophila 30.7 29 . 5 19.6 20 . 2 Chicken 28 .0 28.4 22 . 0 2 1 . 6 Human 29 . 3 30 . 0 20 . 7 20 . 0 Table 1 . 1 a) Analyze the table given . i ) Based on the i nfor'T'at io n from the table , what can you deduce about the ratio of th e bases . ( 1 ) ii) State the im portance of your deduction to the structure of DNA. (2) I papercollection 

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8/14/2019 Stpm Trial 2009 Bio Q&A (Pcghs, Penang)

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