Inglise keel unit 5 answers
DNA, transcribed / used to make, mRNA;
mRNA short-term / DNA (long-term) store; 2 max
(ii) siRNA smaller / fewer nucleotides / only matches part of gene; ora
siRNA double-stranded; ora 2
(b) (complementary) base-pairing;
hydrogen bonding;
between purines and pyrimidines;
A with U; R A with T
C with G;
ref to 2 or 3 bonds (correct context); 3 max
[7]
83. (i) (CCR5 / macrophages)
(siRNAs continue to work) in long-lived cells;
only one treatment needed for macrophages / CCR5;
(siRNAs diluted) as lymphocytes divide; ora
annaabi.ee 
