Match the organism with its use in biotechnology.

NEET-(Sept)2020 [Biotechnology-and-its-applications] [class-xii ]

• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
• (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Correct Option: B  [ (A)-(IV), (B)-(III), (C)-(I), (D)-(II) ]

Remark:

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:

NEET-(Sept)2020 [Biotechnology-and-its-applications] [class-xii ]

• Insect pests
• Fungal diseases
• Plant nematodes
• Insect predators
Correct Option: A  [ Insect pests ]

Remark:

Which of the following statements is not correct?

NEET-(Sept)2020 [Biotechnology-and-its-applications] [class-xii ]

• In man insulin is synthesised as a proinsulin.
• The proinsulin has an extra peptide called C-peptide.
• The functional insulin has A and B chains linked together by hydrogen bonds.
• Genetically engineered insulin is produced in E-Coli.
Correct Option: C  [ The functional insulin has A and B chains linked together by hydrogen bonds. ]

Remark:

RNA interference is used for which of the following purposes in the field of biotechnology?

NEET-(Oct)2020 [Biotechnology-and-its-applications] [class-xii ]

• to develop a plant tolerant to abiotic stresses
• to develop a pest resistant plant against infestation by nematode
• to enhance the mineral usage by the plant
• to reduce post harvest losses
Correct Option: B  [ to develop a pest resistant plant against infestation by nematode ]

Remark:

The laws and rules to prevent unauthorised exploitation of bio-resources are termed as:

NEET-(Oct)2020 [Biotechnology-and-its-applications] [class-xii ]

• Biopatenting
• Bioethics
• Bioengineering
• Biopiracy
Correct Option: A  [ Biopatenting ]

Remark:

Which of the following in true for Golden rice?

NEET-2019 [Biotechnology-and-its-applications] [class-xii ]

• It has yellow grains, because of a gene introduced from a primitive variety of rice
• It is drought tolerant, developed using Agrobacterium vector
• It is pest resistant, with a gene from Bacillus thuringiensis
• It is Vitamin A enriched, with a gene from daffodil
Correct Option: D  [ It is Vitamin A enriched, with a gene from daffodil ]

Remark:

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:

NEET-2024 [Biotechnology-and-its-applications] [class-xii ]

• Both Statement I and Statement II are false
• Both Statement I and Statement II are true
• Statement I is false but Statement II is true
• Statement I is true but Statement II is false
Correct Option: D  [ Statement I is true but Statement II is false ]

Remark: Explanation: NCERT Page No.208,(Topic-12.1 BIOTECHNOLOGICAL APPLICATIONS IN AGRICULTURE)

Which of the following are fused in somatic hybridization involving two varieties of plants?

NEET-2024 [Biotechnology-and-its-applications] [class-xii ]

• Somatic embryos
• Callus
• Pollens
• Protoplasts
Correct Option: D  [ Protoplasts ]

Remark: Explanation: NCERT Page No.178,(Topic-10.1 BIOTECHNOLOGICAL APPLICATIONS IN AGRICULTURE)