AnswersBiology_A_ICThe Basis of DNA Technology

The Basis of DNA Technology Answers

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1
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According to advocates for the use of genetic engineering, which is an example of the importance of recombinant DNA technology?

A
Genes from nuts used in other organisms can affect allergies.
B
The increase of patents drives the seed cost.
C
There is a diminished opportunity for organic agriculture.
D
There is a reduced use of pesticides, herbicides, and fertilizers.
2
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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
4

best

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

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

Question illustration
T
The restriction enzymes cut the isolated DNA into fragments.
T
The gene of interest is inserted into an expression cassette.
T
The recombinant DNA is inserted into the host cell nucleus via a vector.
T
The expression cassette is inserted into a plasmid for cloning.
7

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?

f
foreign DNA
r
restriction DNA
r
recombinant DNA
t
transgenic DNA
8

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
9

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.
10

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

r
restriction enzymes
m
micropipette
b
bacterial plasmid
v
viral phage
11

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
Different sections of DNA from a desired organism are inserted into a host so that beneficial traits will be expressed.
D
One strand of DNA is isolated and inserted into a host so recombinant DNA can be formed.
12

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

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