A transgenic rice having gene for ${\rm{\beta }}$-carotene (pro-vitamin-A)

A type of rice grown along the yellow river in China

Normal variety of rice with golden coloured grains

Wild and long sized rice having golden tint

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NEET • BIOLOGY • BIOTECHNOLOGY AND ITS APPLICATIONS

Biotechnology and its applications practice · Mixed difficulty

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Showing 31-60 of 204 questions

31 Easy

31 of 204

Remembering +4 | -1

When the first clinical gene therapy was given?

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Correct option: A

1990

Option A (1990) is correct because the first clinical gene therapy was given in 1990.

32 Easy

32 of 204

Remembering +4 | -1

Which of the following is now being economically produced by biotechnological procedures?

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Correct option: C

Insulin

Option C (Insulin) is correct because insulin is now economically produced using biotechnological procedures, specifically recombinant DNA technology.

33 Easy

33 of 204

Understanding +4 | -1

Assertion (A): The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency.
Reason (R): Bone marrow transplantation, enzyme replacement therapy are completely curative.

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Correct option: C

Assertion is true but reason is false

The correct answer is C (Assertion is true but reason is false) because the first clinical gene therapy was indeed for ADA deficiency, but bone marrow transplantation and enzyme replacement therapy are not completely curative.

34 Medium

34 of 204

Analyzing +4 | -1

Assertion (A): Transgenic animals are made that carry genes which make them more sensitive to toxic substances than non-transgenic animals.
Reason (R): Toxicity testing in non transgenic animals will allow us to obtain results in less time.

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Correct option: C

Assertion is true but reason is false

Option C is correct because while the assertion is true (transgenic animals can be more sensitive), the reason is false (toxicity testing in non-transgenic animals does not necessarily take less time).

35 Easy

35 of 204

Remembering +4 | -1

The first human hormone produced by recombinant DNA technology is

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Correct option: A

Insulin

Option A (Insulin) is correct because insulin was the first human hormone produced using recombinant DNA technology.

36 Medium

36 of 204

Understanding +4 | -1

Choose the correct option about agrochemicals

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Correct option: D

All of the above

Option D (All of the above) is correct because agrochemicals are expensive, harmful to the environment, and genetically modified crops can be a less expensive alternative.

37 Medium

37 of 204

Understanding +4 | -1

Study the following statements regarding Bt toxins produced by bacterium Bacillus thuringiens is and select the correct one

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Correct option: D

All of the above

Option D (All of the above) is correct because all statements accurately describe Bt toxins.

38 Medium

38 of 204

Application +4 | -1

A doctor, while operating on an HIV⁺ patient accidently cut himself with a scalpel. He comes to you, suspecting himself to have contacted the virus. Which test will you advise him to rule out/confirm his suspicion?

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Correct option: A

PCR

Option A (PCR) is correct because PCR (Polymerase Chain Reaction) is the most sensitive and rapid test to detect the presence of HIV genetic material soon after exposure.

39 Medium

39 of 204

Remembering +4 | -1

Select the molecular diagnostic tool which is used for the detection of mutations in genes in suspected cancer patients.

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Correct option: C

PCR

Option C (PCR) is correct because PCR is a molecular diagnostic tool used for detecting mutations in genes, which is crucial in diagnosing cancer.

40 Medium

40 of 204

Understanding +4 | -1

Which one of the following is correct?

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because herbicides and insecticides act through the mechanisms described.

41 Hard

41 of 204

Remembering +4 | -1

Which of the following technique is based on the principle of antigen-antibody interaction?

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Correct option: B

ELISA

ELISA (Enzyme-Linked Immunosorbent Assay) is based on the principle of antigen-antibody interaction, making Option B the correct answer.

42 Medium

42 of 204

Remembering +4 | -1

An efficient oil eating ‘Super bug’ developed through genetic engineering used in cleaning of oil-spill polluted sites is a species of

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Correct option: C

Pseudomonas

Option C (Pseudomonas) is correct because certain species of Pseudomonas have been genetically engineered to efficiently degrade oil, making them useful for cleaning oil spills.

43 Hard

43 of 204

Remembering +4 | -1

E. coli are used in production of

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Correct option: D

Interferon

Option D (Interferon) is correct because E. coli is commonly used in the production of interferon through recombinant DNA technology.

44 Medium

44 of 204

Understanding +4 | -1

Which step was proved to be the main challenge in the production of human insulin by recombinant DNA technology?

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Correct option: C

Getting insulin assembled into mature form

The correct answer is C (Getting insulin assembled into mature form) because the main challenge was correctly folding and assembling the A and B chains of insulin into the functional, mature form with the correct disulfide bonds.

45 Easy

45 of 204

Understanding +4 | -1

Early detection of a disease is possible by

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Correct option: D

Both (1) and (3)

Option D (Both (1) and (3)) is correct because PCR and rDNA technology with ELISA are both used for early disease detection.

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46 Medium

46 of 204

Remembering +4 | -1

Which of the following can be biotechnological products?

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Correct option: D

All of these

Antibiotics, vaccines, and enzymes can all be produced using biotechnological methods, making Option D (All of these) the correct answer.

47 Easy

47 of 204

Understanding +4 | -1

Read the following and choose the incorrect statement.

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Correct option: D

Mature insulin has three polypeptide chains.

Option D (Mature insulin has three polypeptide chains) is the incorrect statement because mature insulin has only two polypeptide chains (A and B) linked by disulfide bonds.

48 Hard

48 of 204

Understanding +4 | -1

Which of the following processes / techniques are included under the umbrella of biotechnology?
(a) In vitro fertilization leading to a ‘test-tube’ baby
(b) Synthesizing a gene and using it
(c) Developing a DNA vaccine
(d) Correcting a defective gene
Choose the correct option.

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Correct option: D

(a), (b), (c) and (d)

Option D ((a), (b), (c) and (d)) is correct because all listed processes/techniques (in vitro fertilization, gene synthesis, DNA vaccines, and gene correction) fall under the umbrella of biotechnology.

49 Easy

49 of 204

Understanding +4 | -1

Disadvantages of chemical agents are
I. chemicals are toxic and harmful to human beings and animals
II. chemical pollute the environment and plants
III. weedicides used to remove weeds also pollute the soil
Choose the correct option

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Correct option: A

I, II and III

Option A (I, II and III) is correct because all the given statements are disadvantages of chemical agents.

50 Medium

50 of 204

Remembering +4 | -1

A bt prototoxin is

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Correct option: B

Inactive toxin

Option B (Inactive toxin) is correct because Bt protoxin is the inactive form of the toxin produced by Bacillus thuringiensis.

51 Hard

51 of 204

Understanding +4 | -1

Which 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 (The anticoagulant hirudin is being produced from transgenic Brassica napus seeds) is correct because transgenic Brassica napus (rapeseed) is used to produce hirudin.

52 Medium

52 of 204

Remembering +4 | -1

The vector used to transfer a gene to produce pest-resistant tobacco plant is

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Correct option: C

Modified Ti plasmid

Option C (Modified Ti plasmid) is correct because the Ti plasmid from Agrobacterium tumefaciens is commonly modified and used as a vector to transfer genes into plants, including those for pest resistance.

53 Medium

53 of 204

Remembering +4 | -1

Genetically engineered bacteria have been successfully used in the commercial production of

View answer and explanation

Correct option: A

Human insulin

Option A (Human insulin) is correct because genetically engineered bacteria are used to produce human insulin commercially.

54 Medium

54 of 204

Remembering +4 | -1

Biocontrol agent Bacillus thuringiensis (Bt) is used to control

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Correct option: A

Butterfly caterpillars

Option A (Butterfly caterpillars) is correct because Bacillus thuringiensis (Bt) produces toxins that are specifically effective against lepidopteran larvae, which include butterfly caterpillars.

55 Easy

55 of 204

Remembering +4 | -1

Cry II Ab and cry I Ab produce toxins that control

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Correct option: A

Cotton bollworms and corn borer respectively

Option A (Cotton bollworms and corn borer respectively) is correct because Cry II Ab and Cry I Ab toxins are effective against cotton bollworms and corn borers, respectively.

56 Easy

56 of 204

Understanding +4 | -1

Statement A: Bt toxin is produced by Bacillus thuringiensis bacteria during particular phase of their growth.

Statement B: Protoxins are converted into an active form of toxin due to alkaline pH of gut which solubilize the crystals.

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Correct option: A

Both statement A and statement B are correct

Option A (Both statement A and statement B are correct) is correct because both statements accurately describe the production and activation of Bt toxin.

57 Medium

57 of 204

Remembering +4 | -1

Golden rice is

View answer and explanation

Correct option: B

A transgenic rice having gene for

\mathrm{\beta }

-carotene (pro-vitamin-A)

Option B (A transgenic rice having gene for

\mathrm{\beta }

-carotene (pro-vitamin-A)) is correct because golden rice is genetically engineered to produce beta-carotene, a precursor to vitamin A.

58 Easy

58 of 204

Understanding +4 | -1

Which of the following could be a permanent cure for treatment of Severe Combined Immuno Deficiency (SCID)?

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Correct option: A

Gene therapy

Option D (All of the above) is the most comprehensive answer because gene therapy, bone marrow transplant, and enzyme replacement therapy are all potential treatments for SCID, but gene therapy offers the possibility of a permanent cure.

59 Hard

59 of 204

Understanding +4 | -1

In order for gene therapy to be most effective, genes should be inserted in

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Correct option: C

Stem cell

Option C (Stem cell) is correct because stem cells can differentiate into various cell types, ensuring that the introduced gene is present in all future generations of cells derived from the stem cell.

60 Hard

60 of 204

Remembering +4 | -1

A Protoxin is?

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Correct option: D

Inactive toxin

Option D (Inactive toxin) is correct because a protoxin is an inactive precursor of a toxin that needs to be activated to become toxic.

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