1. One of the aims of genetic engineering is to produce a protein as cheaply and easily as possible.  In order to do this, the gene that triggers production of the desired protein is inserted into a host organism.
(a) State three reasons why bacteria make good host organisms.
  • Asexual reproduction, parent cells produce identical daughter cells.

  • Grow quickly.
  • Easily manipulated.
  • Simple chromosome.
  • Contains plasmids.
(b)  Define a vector in relation to genetic engineering?
  • A carrier DNA molecule, the desired gene can be inserted.
(c) Define a plasmid in relation to genetic engineering?   
  • A small extrachromosomal circular piece of DNA naturally found in bacteria. Often used as a vector.