Genetic Engineering QUIZ

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12 Δεκ 2012 (πριν από 4 χρόνια και 11 μήνες)

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Genetic Engineering QUIZ


Multiple Choice

Identify the letter of the choice that best completes the statement or answers the question.


____

1.

Selective breeding produces

a.

more offspring.

c.

desired traits in offspring.

b.

fewer offspring.

d.

transgenic organisms.



____

2.

Which of the following is most likely to bring together two recessive alleles for a genetic defect?

a.

inbreeding

c.

genetic engineering

b.

hybridization

d.

transformation



____

3.

Which of the following statements is
NOT true?

a.

Inbreeding and hybridization are opposite processes.

b.

A hybrid plant has all the characteristics of both its parents.

c.

Inbreeding can produce an offspring that has a defect that neither parent shows.

d.

Hybridization is used to produce
new varieties of plants and animals.



____

4.

Scientists produced oil
-
eating bacteria by

a.

making bacteria polyploid.

c.

inducing mutations in bacteria.

b.

inbreeding bacteria.

d.

hybridizing bacteria.



____

5.

What is the ultimate source of genetic
variability?

a.

inbreeding

c.

hybridization

b.

radiation

d.

mutations



____

6.

Breeders induce mutations in organisms to

a.

increase diversity in populations.

b.

make organisms more alike.

c.

avoid selective breeding.

d.

produce

organisms with undesirable characteristics.



____

7.

Which of the following includes all the others?

a.

hybridization

c.

selective breeding

b.

inbreeding

d.

induced mutations



____

8.

Polyploidy instantly results in a new plant species because it

a.

changes a species’ number of chromosomes.



灲潤畣敳⁡⁨慲摩er⁳灥pi敳.



捡畳u猠s畴慴i潮献



慬l 潦 t桥h慢潶e



____

9.

One function of gel electrophoresis is to

a.

separate DNA fragments.

c.

recombine DNA.

b.

cut DNA.

d.

extract DNA.



____

10.

The process of making changes in the DNA code of a living organism is called

a.

selective breeding.

c.

inbreeding.

b.

genetic engineering.

d.

hybridization.



____

11.

A DNA molecule produced by combining DNA from different sources is known as

a.

a

mutant.

c.

a polyploid.

b.

a hybrid.

d.

recombinant DNA.



____

12.

During transformation,

a.

a prokaryote is changed into a eukaryote.

b.

a cell takes in DNA from outside the cell.

c.

foreign DNA is inserted into a plasmid.

d.

a cell is mutated.



____

13.

Which of the following steps is NOT essential in producing recombinant DNA?

a.

Cut out a piece of DNA from a DNA molecule.

b.

Splice a piece of DNA into DNA from another organism.

c.

Use a restriction enzyme to form sticky ends in DNA.

d.

Read
the DNA sequence of the piece of DNA to be cut and spliced.



____

14.

A gene that makes it possible to distinguish bacteria that carry a plasmid (and the foreign DNA) from those
that don’t is called a(an)

a.

resistance gene.

c.

genetic marker.

b.

antibiotic.

d.

clone.



____

15.

Which of the following is often used as a genetic marker?

a.

a foreign gene

b.

a gene for antibiotic resistance

c.

a DNA sequence that serves as a bacterial origin of replication

d.

a nucleotide labeled with a
fluorescent dye



____

16.

The transformation of a plant cell is successful if

a.

the plasmid that entered the cell reproduces inside the cell.

b.

the foreign DNA is integrated into one of the cell’s chromosomes.



t桥⁣敬l⁲数eo摵捥献



a

灬a獭i搠桡d⁥湴er敤et桥hc敬l.



____

17.

What is an advantage of using transgenic bacteria to produce human proteins?

a.

The human proteins produced by transgenic bacteria work better than those produced by
humans.

b.

Transgenic bacteria can produce
human proteins in large amounts.

c.

The human proteins produced by transgenic bacteria last longer than those produced by
humans.

d.

Transgenic bacteria can produce human proteins used to make plastics.



____

18.

What has been an advantage of producing

transgenic plants?

a.

increasing the food supply

c.

producing clones

b.

using more pesticides

d.

studying human genes



____

19.

To produce transgenic bacteria that make insulin, which of the following steps did scientists have to take
first?

a.

Insert
the human insulin gene into a plasmid.

b.

Extract the insulin from the bacterial culture.

c.

Use a restriction enzyme to cut out the insulin gene from human DNA.

d.

Transform bacteria with the recombinant plasmid.



____

20.

What are scientists more
likely to learn from transgenic animals than from transgenic bacteria or transgenic
plants?

a.

the structure of human proteins

c.

how human genes function

b.

the process of cloning

d.

how plasmids reproduce



Short Answer



21.

How are the selective
breeding techniques of hybridization and inbreeding opposites?







22.

Why would breeders want to increase a population’s mutation rate?






Essay



23.

Explain an advantage and a disadvantage of inbreeding.