Researchers Used the CRISPR System to Make 455 Different Cuts

question 51

Multiple Choice

Researchers used the CRISPR system to make 455 different cuts in the porcine endogenous retrovirus (PERV) pol genes in the pig genome.All of the PERV genes were inactivated in the pig embryos even though only 20 percent of the resulting mutations were larger than nine base pairs.The resulting mutations were successful at knocking out the PERV genes because

• A) even single point mutations can be enough to make a gene product useless or inactivate a gene.
• B) large mutations are not useful in knocking out genes.
• C) inactivating 20 percent of the PERV genes is just as good as inactivating 100 percent of the PERV genes.
• D) only 20 percent of the PERV genes need to be inactivated to result in all of them being inactive.

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Definitions:

Demand Curve

A graph that shows the relationship between the price of a good and the quantity of that good consumers are willing and able to purchase at various prices.

Supply Curve

A graphical representation showing the relationship between the price of a good and the amount of it that suppliers are willing to produce.

Actual Price

The price at which goods or services are sold in the market, as opposed to theoretical or listed prices.

Supply-Side Market Failure

A situation where the production of a good or service does not take into account the full cost of its impact, leading to overproduction or underproduction.