Protein Synthesis
The lac operon contains the z, y and a structural genes

encoding P-galactosidase only
encoding p-galactosidase and galactose permeases
encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
None of these

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Protein Synthesis
Type I proteins (plasma membrane) have a

multiple signal sequence that doubles as the membrane anchoring sequence
cleavage N- terminal signal sequence and a hydrophobic stop transfer sequence
multiple signal sequence and a hydrophobic stop transfer sequence
cleavaged N- terminal signal sequence that doubles as the membrane anchoring sequence

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