Biotechnology and its Applications Test

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Biotechnology and its Applications Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Maximum number of existing transgenic animals is of

A
Pig

B
Fish

C
Mice

D
Cow

Solution

In transgenic animals, foreign genes are deliberately inserted into their genome. Maximum number (95%) of existing transgenic animals are mice because they are model organism that can be treated in the laboratory with easy handling and they can grow over a limited period.
So, the correct option is option C.
Question 2
1 / -0

Transgenic plants are

A
Grown in artificial medium after hybridization in the field

B
Produced by a somatic embryo in artificial medium

C
Generated by introducing foreign DNA into a cell and regenerating a plant from that cell

D
Produced after protoplast fusion in artificial medium

Solution

The plants obtained through genetic engineering contain a gene/genes usually from an unrelated organism, such genes are called transgenes, and the plants containing transgenes are called transgenic plants. These plants are often called genetically modified or GM crops, e.g. Flavr savr tomatoes, golden rice. Plants are made transgenic for identification, expressing the gene activity in time, to produce several chemicals like fatty acids, sugars, cellulose, rubber, etc.
So, the correct option is option C.
Question 3
1 / -0

Assertion : Genital herpes cannot be cured if recurrent.
Reason : Genital herpes can be inhibited by acyclovir.

A
Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.

B
Both the Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

C
The Assertion is true but the Reason is false.

D
Both the Assertion and Reason are false.

E
The Assertion is false but Reason is true.

Solution

An antiviral drug is used to treat genital herpes outbreaks stay symptom-free longer. These drugs can also reduce the severity and duration of symptoms when they do flare up. Drug therapy is not a cure, but it can make living with the condition easier. Because of lack of research about the Herpes virus action mechanism, there is no cure for Herpes but it is inhibited by acyclovir. It is one of the most common sexually transmitted infections.
Question 4
1 / -0

Genetic engineering has been successfully used for producing

A
transgenic mice for testing safety of polio vaccine before use in humans

B
transgenic models for studying new treatments for certain cardiac disease

C
transgenic Cow-Rosie which produces high fat milk for making ghee

D
Animals like bulls for farm work as they have super power

Solution

Genetic engineering is the process where gene is manipulated through biotechnology process. Vaccine is first experimented on mice before use by humans as it helps in identifying side effects and other harmful effects. It is also necessary for obtaining approval for the vaccine
So, the correct option is option A
Question 5
1 / -0

An example of gene therapy is

A
Production of injectable Hepatitis-B vaccine

B
Production of vaccines in food crops like potatoes which can be eaten

C
Introduction of gene for adenosine deaminase in persons suffering from severe combined immuno-deficiency (SCID)

D
Production of test tube babies by artificial insemination and implantation of fertilized eggs

Solution

Gene therapy is the process of introduction of DNA into living human beings in order to treat disease. It is used to replace a missing gene product or to correct mutant alleles. For example, human gene therapy trial can be used for ex vivo introduction of functional ADA gene in bone marrow cells of the patient, suffering from SCID, through an engineered retrovirus containing a functional ADA gene. The treated cells were reintroduced into the patient’s marrow. Manual mixing of sperms and egg followed by implantation of fertilised egg in the uterus of the surrogate mother is called in vitro fertilisation. Gene manipulation refers to any techniques that create recombinant DNA which carries DNA from two different sources. Vaccines are produced by gene manipulation techniques.
Thus, the correct answer is option C.
Question 6
1 / -0

The Ti plasmid is often used for making transgenic plants. This plasmid is found in

A
Rhizobium of the roots of leguminous plants

B
Agrobacterium

C
Yeast as a 2 $$\mu$$m plasmid

D
Azotobacter

Solution

A Ti or tumour inducing plasmid is a plasmid that often, but not always, is a part of the genetic equipment that Agrobacterium tumefaciens and Agrobacterium rhizogenes use to transduce their genetic material to plants.
Question 7
1 / -0

The technique of obtaining large number of plantlets by tissue culture method is called as

A
Plantlet culture

B
Organ culture

C
Micropropagation

D
Macropropagation
Solution
Correct option: C
Explanation:
Plantlet culture is the growing of plants in test tubes.
Organ culture refers to the in vitro growth of organs or part of organs.
Micropropagation is the large scale production of plants in controlled environmental conditions by tissue culture.
Macropropagation involves the generation of suckers from planting material by removing apical dominance
Hence, the technique of obtaining a large number of plantlets by tissue culture method is called "micropropagation".
Question 8
1 / -0

Flavr savr is

A
Tetraploid variety

B
Haploid variety

C
Somaclonal variant

D
Transgenic variety

Solution

Flavr Savr is a genetically modified tomato. This was the first commercially grown genetically engineered food. Flavr Savr tomato is more resistant to rotting. This feature is due to the introduction of an antisense gene which interferes with the production of enzyme polygalacturonase. This enzyme is responsible for the degradation of pectin which is present in the cell wall of the fruit. This results in the softening and makes the fruit susceptible to fungal infections. The modified fruit has extended shelf life due to reduction in the ripening rate.
Thus, the correct answer is option C.
Question 9
1 / -0

Transgenic plants receive genes from which of the following organisms?

A
Insects

B
Bacteria

C
Virus

D
All of the above
Question 10
1 / -0

Which of the following was the first transgenic plant?

A
Potato

B
Tomato

C
Tobacco

D
Maize

Solution

The plants carrying one or more genes from a different organism or plant source is a transgenic plant. The first transgenic plant was a tobacco plant which bear resistance to antibiotics and was created in 1983. The first transgenic Bt potato was produced in 1995. The first transgenic tomato was produced by China which was virus-resistant. The first transgenic maize was insect protected variety (1996).
Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Biotechnology and its Applications Test - 19

Result

Biotechnology and its Applications Test - 19

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SHARING IS CARING

Question 1

Pig

Fish

Mice

Cow

Solution

Question 2

Grown in artificial medium after hybridization in the field

Produced by a somatic embryo in artificial medium

Generated by introducing foreign DNA into a cell and regenerating a plant from that cell

Produced after protoplast fusion in artificial medium

Solution

Question 3

Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.

Both the Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

The Assertion is true but the Reason is false.

Both the Assertion and Reason are false.

The Assertion is false but Reason is true.

Solution

Question 4

transgenic mice for testing safety of polio vaccine before use in humans

transgenic models for studying new treatments for certain cardiac disease

transgenic Cow-Rosie which produces high fat milk for making ghee

Animals like bulls for farm work as they have super power

Solution

Question 5

Production of injectable Hepatitis-B vaccine

Production of vaccines in food crops like potatoes which can be eaten

Introduction of gene for adenosine deaminase in persons suffering from severe combined immuno-deficiency (SCID)

Production of test tube babies by artificial insemination and implantation of fertilized eggs

Solution

Question 6

Rhizobium of the roots of leguminous plants

Agrobacterium

Yeast as a 2 $$\mu$$m plasmid

Azotobacter

Solution

Question 7

Plantlet culture

Organ culture

Micropropagation

Macropropagation

Solution

Question 8

Tetraploid variety

Haploid variety

Somaclonal variant

Transgenic variety

Solution

Question 9

Insects

Bacteria

Virus

All of the above

Question 10

Potato

Tomato

Tobacco

Maize

Solution

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