LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which bacterium is used in the production of insulin by genetic engineering?
A
Saccharomyces
B
Rhizobium
C
Mycobacterium
D
Escherichia
Explanation: 

Detailed explanation-1: -Nowadays, recombinant human insulin is mainly produced either in E. coli or Saccharomyces cerevisiae.

Detailed explanation-2: -Genetically engineered insulin or humulin can be produced by inserting the human gene of insulin into a plasmid isolated from E. coli bacterium and then production of a number of copies or clones of that recombinant gene by insertion of the recombinant gene into another E. coli bacterium.

Detailed explanation-3: -As pictured, 2 E. coli strains were engineered to contain chemically synthesized insulin A or B chain genes inserted into the -galactosidase gene (-gal) of a plasmid cloning vector. The bacteria made a fused, chimeric protein--galactosidase linked by methionine to an insulin tail.

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