Pretest

Question 1

Which of the statements about the relationship between DNA technology and genetic diversity is accurate?

Revolt · Accepted Answer

DNA technology can reduce genetic diversity by eliminating variant alleles.

Question 2

Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. What is the new DNA called?

Revolt · Accepted Answer

recombinant DNA

Question 3

Which best describes the process of making recombinant DNA?

Revolt · Accepted Answer

The sticky ends of fragmented DNA are joined with vector DNA.

Question 4

Scientists have been able to inject the firefly's lighting gene into a tobacco plant, allowing it to glow. Which type of organism is this tobacco plant?

Revolt · Accepted Answer

transgenic organism

Question 5

What is the most efficient procedure that scientists can use to obtain more recombinant DNA for a particular trait?

Revolt · Accepted Answer

clone the recombinant DNA in a biological vector

Question 6

Which is the role of restriction enzymes?

Revolt · Accepted Answer

to cut DNA into fragments of different lengths

Question 7

Which is a mechanical vector that injects recombinant DNA directly into the nucleus of a host cell?

Revolt · Accepted Answer

micropipette

Question 8

Which best explains why DNA technology is important for disease prevention?

Revolt · Accepted Answer

It can help detect if a person is prone to certain diseases.

Question 9

Which best describes the first step in genetic engineering?

Revolt · Accepted Answer

Fragments of DNA that have desired genes are isolated to form recombinant DNA for use in a host.

Question 10

Which best illustrates the importance of DNA technology?

Revolt · Accepted Answer

a potato plant that is modified to resist pests

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