Inglise keel unit 5 answers
ref to lac operon ;
(iii) ref to, promoter / operator / ‘on’ switch ;
allele T is regulator ;
(protein) binds to DNA ;
(protein) binds to repressor and prevents it binding to DNA ;
allows RNA polymerase to bind ;
AVP ; e.g. enzyme affecting transcription 2 max
(d) (i) tt + T / AW, increases number of tillers per plant ;
and number of branches per tiller ;
ref to comparative figures ; 2 max
(ii) inserted into genome randomly / cannot choose where it is inserted ;
may be within a frequently expressed gene ;
may be after an ‘on’ switch ;
lacks normal controls ;
AVP ; e.g
annaabi.ee 
