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The Basis of DNA Technology — Quiz Answers

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4

Which is the role of restriction enzymes?

A
to isolate the selected gene
B
to move and separate the strands of DNA
C
to join the sticky ends of DNA fragments
D
to cut DNA into fragments of different lengths
5

Which best describes the process of making recombinant DNA?

A
The isolated DNA is inserted into a mechanical vector for cloning.
B
The isolated genes are placed into a vector.
C
The sticky ends of fragmented DNA are joined with vector DNA.
D
The isolated genes are joined by using restriction enzymes.
6

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

A
It can treat diseases with the help of genetically modified food.
B
It can manipulate genes to express desirable traits.
C
It can help detect if a person is prone to certain diseases.
D
It can increase the genetic diversity of a species.
8

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

A
use restriction enzymes to cut the recombinant DNA into fragments
B
clone the recombinant DNA in a biological vector
C
isolate more recombinant DNA
D
use electrophoresis to separate more recombinant DNA
9

Which best describes the first step in genetic engineering?

A
Fragments of DNA that have desired genes are isolated to form recombinant DNA for use in a host.
B
All the DNA from a desired organism is isolated to form recombinant DNA for use in a host.
C
One strand of DNA is isolated and inserted into a host so recombinant DNA can be formed.
D
Different sections of DNA from a desired organism are inserted into a host so that beneficial traits will be expressed.
10

Which best illustrates the importance of DNA technology?

A
a dog that has a mechanical limb
B
a potato plant that is modified to resist pests
C
a flower that has a pattern designed by people
D
an elephant calf that has a mutation in its DNA

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