题目内容

Bacillus thuringensis (Bt) corn:

A. The entire genome of Bacillus thuringensis bacterium is added to the corn genome to protect the corn from insects such as the corn borer.
B. The corn genome has been modified to include genes from Bacillus thuringensis bacterium. When the field is sprayed with insecticides the plant is not affected while the insects are killed.
C. The corn is protected against insects (in particular the corn borer) through the insertion of genes that code for the Bacillus thuringensis toxin into the seed. The farmer does not have to spray pesticides because when the part of the plant with the Bacillus thuringensis genes is ingested, the insect dies.

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Researchers are developing a genetically modified version of rice that helps prevent iron deficiency anemia, a health issue that affects approximately 2 billion people. What organism are they using as the source of genes to code for ferritin, an iron storage protein? Answer in one word:______

During the 1980’s researchers used computer models to predict the effect of life expectancy of reducing fat in the diet from 30% to 10% (commonly recommended for low fat diets). What did the research show in terms of life expectancy?

A. There was no change in life expectancy.
B. Life expectancy was extended by 3 years.
C. Life expectancy was reduced by 3 months.
D. Life expectancy was extended by 3 days to 3 months.
E. Life expectancy was reduced by 3 years.

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Trans fats do not occur naturally in food products.

A. True
B. False

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Trans fats are an impurity of the hydrogenation process. The momentary addition of one hydrogen atom to the double bond followed by a rotation of the chain about the temporary single bond linkage in the fat molecule and loss of this hydrogen atom back to the catalyst permits the reformation of a double bond in the trans arrangement.

A. True
B. False

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