AnswersCA-Life Science B High SchoolPopulation Growth

The Basis of DNA Technology Answers

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

A
restriction enzymes
B
micropipette
C
bacterial plasmid
D
viral phage
2
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Which best explains why DNA technology is important for disease prevention?

A
It can help detect if a person is prone to certain diseases.
B
It can manipulate genes to express desirable traits.
C
It can treat diseases with the help of genetically modified food.
D
It can increase the genetic diversity of a species.
3

The diagram illustrates the process of developing genetically modified corn.What occurs at step 3 in the diagram?

Question illustration
A
The restriction enzymes cut the isolated DNA into fragments.
B
The gene of interest is inserted into an expression cassette.
C
The recombinant DNA is inserted into the host cell nucleus via a vector.
D
The expression cassette is inserted into a plasmid for cloning.
4

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

A
DNA technology can reduce genetic diversity by eliminating existing clones.
B
DNA technology can reduce genetic diversity by eliminating variant alleles.
C
DNA technology can increase genetic diversity by producing more clones.
D
DNA technology can increase genetic diversity by producing more variant alleles.
5

Which is the role of restriction enzymes?

A
to isolate the selected gene
B
to cut DNA into fragments of different lengths
C
to move and separate the strands of DNA
D
to join the sticky ends of DNA fragments
6

The insertion of the human insulin gene into the bacterium Escherichia coli allowed it to produce human insulin. Which type of organism is E. coli?

A
restriction organism
B
recombinant organism
C
transgenic organism
D
vector organism
7

Which best illustrates the importance of DNA technology?

A
an elephant calf that has a mutation in its DNA
B
a dog that has a mechanical limb
C
a potato plant that is modified to resist pests
D
a flower that has a pattern designed by people
8

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?

A
foreign DNA
B
restriction DNA
C
recombinant DNA
D
transgenic DNA
9

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

A
isolate more recombinant DNA
B
use electrophoresis to separate more recombinant DNA
C
clone the recombinant DNA in a biological vector
D
use restriction enzymes to cut the recombinant DNA into fragments
10

Which is an advantage of genetic engineering?

A
lack of labeling of food products that have been genetically engineered
B
diminished opportunities for organic agriculture
C
lack of long-term studies on food safety and environmental impact
D
diminished effects of diseases on crops

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