Explain why bacteria are valuable in biotechnology.
State which organ contains the cells that were destroyed.
State the name of the disease that is caused by the destruction of these cells.
State what insulin does in the body.
Complete Fig. 3.1 by inserting the labels for the axes at 1 and 2.
State the names of the stages of bacterial population growth labelled P to S.
Explain, using Fig. 3.1, why the bacteria did not keep growing in the fermenter beyond five days.
Mineral salts are essential in the human diet. One of the most important is iron. Explain the importance of iron in the human diet and the effects of an iron deficiency.
State the name of the enzyme used to remove the gene from the DNA of A. thaliana.
Describe how the gene from A. thaliana and the DNA from cassava are joined to make recombinant DNA.
Scientists who develop genetically engineered crop plants often breed them for several generations before releasing them for farmers to use. Suggest why the scientists do this.