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NEET • BIOLOGY • BIOTECHNOLOGY AND ITS APPLICATIONS
Biotechnology and its applications practice · Mixed difficulty
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Showing 1-30 of 204 questions
1
Medium
1 of 204
Understanding
+4 | -1
Multicellular organisms that carries a specific genetic change in each cell because of an intervention at the fertilized egg stage is a
View answer and explanation
Correct option: C
Transgenic
Option C is correct because a transgenic organism carries a specific genetic change in each cell due to intervention at the fertilized egg stage.
2
Easy
2 of 204
Remembering
+4 | -1
Which bacteria was the first to be used as biopesticide on the commercial scale in the world?
View answer and explanation
Correct option: A
Bacillus thuringiensis
Option A (Bacillus thuringiensis) is correct because Bacillus thuringiensis (Bt) was the first bacteria to be used commercially as a biopesticide due to its production of insecticidal toxins.
3
Easy
3 of 204
Understanding
+4 | -1
Which of the following options is not a reason to produce transgenic animals?
View answer and explanation
Correct option: D
To bring about changes in natural evolutionary pattern
Option D is correct because changing the natural evolutionary pattern is not a primary goal or justification for producing transgenic animals; their purpose is more focused on research, disease models, and biological product creation.
4
Medium
4 of 204
Remembering
+4 | -1
The process of RNA interference has been used to make tobacco plant resistant to
View answer and explanation
Correct option: B
Meloidogyne incognita
Option B is correct because RNA interference has been used to make tobacco plants resistant to Meloidogyne incognita, a nematode.
5
Hard
5 of 204
Remembering
+4 | -1
Biotechnology medical products include
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because insulin, growth hormone, and tpa are all produced using biotechnology for medical applications.
6
Medium
6 of 204
Remembering
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Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called
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Correct option: A
Genetically modified organisms
Option A (Genetically modified organisms) is correct because organisms with altered genes through manipulation are called GMOs.
7
Hard
7 of 204
Understanding
+4 | -1
Which one of the following is a correct statement?
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Correct option: C
The anticoagulant 'hirudin' is being produced from transgenic Brassica napus seeds.
Option C is correct because the anticoagulant 'hirudin' is indeed being produced from transgenic Brassica napus seeds.
8
Medium
8 of 204
Understanding
+4 | -1
The SCID patient has a defective gene for the enzyme Adenosine Deaminase (ADA). He/She lacks functional …… and therefore, fails to fight the infecting pathogens
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Correct option: C
T-lymphocytes
The correct answer is C (T-lymphocytes) because ADA deficiency primarily affects T-lymphocytes, which are crucial for cell-mediated immunity and fighting infections.
9
Medium
9 of 204
Remembering
+4 | -1
The site of the production of ADA in the body is
View answer and explanation
Correct option: B
Lymphocytes
Option B (Lymphocytes) is correct because ADA (Adenosine Deaminase) is primarily produced in lymphocytes.
10
Easy
10 of 204
Remembering
+4 | -1
Which of the following can be controlled by using biopesticides?
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Correct option: D
All of these
Option D (All of these) is correct because biopesticides can be used to control insects, diseases, and weeds through various mechanisms.
11
Easy
11 of 204
Remembering
+4 | -1
The protein produced by some strains of Bacillus thuringiensis can kill all of the following except
View answer and explanation
Correct option: D
Ants
Option D is correct. Bt toxin is effective against beetles, armyworms (caterpillars), and flies, but not ants.
12
Medium
12 of 204
Understanding
+4 | -1
Biopiracy is
View answer and explanation
Correct option: C
The use of bioresources of a country without proper authorisation
Option C (The use of bioresources of a country without proper authorisation) is correct because it accurately defines biopiracy.
13
Easy
13 of 204
Remembering
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Which technique should be used to achieve amplification of the nucleic acid?
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Correct option: B
PCR
PCR (Polymerase Chain Reaction) is the technique used to amplify nucleic acid, making Option B the correct answer.
14
Medium
14 of 204
Understanding
+4 | -1
The most likely reason for the development of resistance against pesticides in insect damaging a crop is
View answer and explanation
Correct option: C
Directed mutations
The correct answer is A (Random mutations) because resistance to pesticides arises from random mutations in insects that happen to confer resistance, which are then selected for by the pesticide application.
15
Medium
15 of 204
Understanding
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Tobacco plant resistant to a nematode have been developed by the introduction of DNA that produces (in the host cells)
View answer and explanation
Correct option: B
Both sense and antisense RNA
Option B is correct because the nematode-resistant tobacco plant produces both sense and antisense RNA to silence specific nematode genes.
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16
Medium
16 of 204
Remembering
+4 | -1
Number of recombinant therapeutics presently being marketed in India are.
View answer and explanation
Correct option: B
12
Option B (12) is correct because there are approximately 12 recombinant therapeutics currently marketed in India.
17
Hard
17 of 204
Understanding
+4 | -1
Assertion (A): In gene therapy of SCID, a patient requires periodic infusion of genetically engineered lymphocytes.
Reason (R): If the ADA gene is introduced into cells at early embryonic stage, it could be a permanent cure.
Reason (R): If the ADA gene is introduced into cells at early embryonic stage, it could be a permanent cure.
View answer and explanation
Correct option: B
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
The correct answer is B (Both (A) & (R) are true but the (R) is not the correct explanation of the (A)) because both statements are true, but the reason doesn't directly explain why periodic infusions are needed. The need for periodic infusions is due to the limited lifespan of the genetically engineered lymphocytes.
18
Medium
18 of 204
Remembering
+4 | -1
Father of green revolution in India is
View answer and explanation
Correct option: A
M S Swaminathan
Option A (M S Swaminathan) is correct because M.S. Swaminathan is widely regarded as the father of the Green Revolution in India for his role in introducing high-yielding varieties of wheat and rice.
19
Medium
19 of 204
Understanding
+4 | -1
Producing a giant mouse in the laboratory was possible through
View answer and explanation
Correct option: A
Gene manipulation
Option A is correct because gene manipulation, such as inserting a growth hormone gene, can lead to the production of a giant mouse in the laboratory.
20
Hard
20 of 204
Remembering
+4 | -1
What is golden rice?
View answer and explanation
Correct option: B
A GM crop designed to produce -carotene, which the body converts to vitamin A
Option B (A GM crop designed to produce -carotene, which the body converts to vitamin A) is correct because golden rice is a genetically modified crop engineered to produce beta-carotene, a precursor to vitamin A, to combat vitamin A deficiency.
21
Hard
21 of 204
Understanding
+4 | -1
Assertion (A): The recombinant therapeutics do not induce unwanted immunological response.
Reason (R): About 30 recombinant therapeutics have been approved for human use world-wide.
Reason (R): About 30 recombinant therapeutics have been approved for human use world-wide.
View answer and explanation
Correct option: B
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
Option B is correct because both the assertion and the reason are true, but the reason does not explain why recombinant therapeutics do not induce unwanted immunological responses.
22
Hard
22 of 204
Understanding
+4 | -1
Given below are two statements:
Statement I: Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II: Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect
the inactive protoxin gets converted into active form due to acidic pH of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
Statement I: Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II: Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect
the inactive protoxin gets converted into active form due to acidic pH of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
View answer and explanation
Correct option: B
Statement I is true but Statement II is false
Option B is correct because Statement I is true, stating Bt toxins are insect group specific and coded by cry IAc, while Statement II is false, as the protoxin activation occurs due to alkaline pH, not acidic.
23
Easy
23 of 204
Understanding
+4 | -1
Eli Lilly company produced DNA sequences corresponding to the following types of chains of Insulin gene
I) 'A' chain
II) 'B' chain
III) 'C' chain
IV) 'D' chain
I) 'A' chain
II) 'B' chain
III) 'C' chain
IV) 'D' chain
View answer and explanation
Correct option: C
I, II only
The correct answer is C (I, II only) because Eli Lilly produced DNA sequences corresponding to the 'A' and 'B' chains of the insulin gene, which are the functional chains of insulin. The 'C' chain is removed during insulin maturation.
24
Easy
24 of 204
Application
+4 | -1
Babanrao is an organic farmer growing ladyfingers in his field. What are the precautions he will take to control pests in his field?
I) Use of ladybird and dragonflie to control butterfly caterpillars
II) Use of Nucleopolyhedrovirus to control arthropods.
III) Use of Bacillus thuringiensis to control butterfly caterpillars
IV) Use of Trichoderma to control arthropods
I) Use of ladybird and dragonflie to control butterfly caterpillars
II) Use of Nucleopolyhedrovirus to control arthropods.
III) Use of Bacillus thuringiensis to control butterfly caterpillars
IV) Use of Trichoderma to control arthropods
View answer and explanation
Correct option: B
II and III
Option B (II and III) is correct because Nucleopolyhedrovirus and Bacillus thuringiensis are commonly used in organic farming to control pests.
25
Medium
25 of 204
Understanding
+4 | -1
A single stranded DNA (or) RNA, tagged with a radio active molecule (probe) is allowed to hybridize to its. Complementary DNA in a clone of cells followed by detection using
View answer and explanation
Correct option: B
Autoradio graphy
Option B (Autoradio graphy) is correct because autoradiography is used to detect the radioactive probe hybridized to its complementary DNA.
26
Medium
26 of 204
Remembering
+4 | -1
First transgenic cow produced milk enriched with
View answer and explanation
Correct option: B
2.4 gm human alpha – lactalbumin per L
Option B (2.4 gm human alpha – lactalbumin per L) is correct because the first transgenic cow produced milk enriched with 2.4 gm human alpha – lactalbumin per liter.
27
Medium
27 of 204
Analyzing
+4 | -1
Assertion (A): Going beyond the morality of human activities, the biological significance is important.
Reason (R): Genetic modification of organisms can have unpredictable results when they are introduced into the ecosystem.
Reason (R): Genetic modification of organisms can have unpredictable results when they are introduced into the ecosystem.
View answer and explanation
Correct option: A
Both assertion and reason are true and reason is the correct explanation of assertion
Option A is correct because both the assertion and reason are true, and the reason correctly explains why biological significance is important beyond morality.
28
Easy
28 of 204
Understanding
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Assertion (A): For effective treatment of a disease, early diagnosis and understanding its pathophysiology is very important.
Reason (R): r-DNA technology, PCR and ELISA are some of the techniques that serve the purpose of early diagnosis.
Reason (R): r-DNA technology, PCR and ELISA are some of the techniques that serve the purpose of early diagnosis.
View answer and explanation
Correct option: B
Both assertion and reason are true but reason is not the correct explanation of assertion
Option B (Both assertion and reason are true but reason is not the correct explanation of assertion) is correct because both the assertion and the reason are true statements, but the reason doesn't directly explain why early diagnosis and understanding pathophysiology are important for effective treatment.
29
Easy
29 of 204
Understanding
+4 | -1
Which of the following is used for introducing nematode specific genes into host tobacco plant for initiating RNAi?
View answer and explanation
Correct option: B
Agrobacterium vector
Option B (Agrobacterium vector) is correct because Agrobacterium is commonly used to introduce genes into plants for RNA interference.
30
Hard
30 of 204
Understanding
+4 | -1
Which of the following is not a use of genetic modification in transgenic plants?
View answer and explanation
Correct option: A
Making crops more sensitive to abiotic stresses
Option A (Making crops more sensitive to abiotic stresses) is correct because genetic modification aims to make crops *more* resistant, not sensitive, to abiotic stresses.
Revision notes and key takeaways
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Key Takeaways
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