Why have scientists inserted the human insulin gene into the genome of E. coli bacteria?
A) A person who is unable to produce insulin can be cured if infected by a bacterium carrying the human insulin gene.
B) Bacteria express the human insulin gene and produce large quantities of the insulin protein, which is sold pharmaceutically.
C) Insertion of the human insulin gene into E. coli causes the cells to rupture, thereby controlling and reducing bacterial infections.
D) The recombinant bacteria can be used in gene therapy of individuals who have type 1 diabetes.
E) The engineered bacteria are used by the food industry as a supplement that improves the absorption of glucose
B) Bacteria express the human insulin gene and produce large quantities of the insulin protein, which is sold pharmaceutically.
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The accompanying figure shows a portion of the cell membrane. Which one of the following processes does it depict?
A) diffusion B) endocytosis C) facilitated diffusion D) gated channels E) exocytosis
Select the two major functions of the estrogen and progesterone secreted by the human placenta.
Where is an atrioventricular valve located?
a. where blood enters the aorta b. between the right atrium and the right ventricle c. between both atria and ventricles d. between the left atrium and the left ventricle