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Test: Biotechnological Applications in Agriculture (NCERT) - NEET MCQ


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25 Questions MCQ Test Biology Class 12 - Test: Biotechnological Applications in Agriculture (NCERT)

Test: Biotechnological Applications in Agriculture (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Biotechnological Applications in Agriculture (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Biotechnological Applications in Agriculture (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biotechnological Applications in Agriculture (NCERT) below.
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Test: Biotechnological Applications in Agriculture (NCERT) - Question 1

Bt  toxin gene has been cloned from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Examples of such plants are

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 1

Bt toxin gene has been closed from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Examples are Bt cotton, Bt corn, rice, tomato, potato and soybean, etc.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 2

Though Green Revolution has been a resounding success in terms of agricultural, production, yet it has failed in its overall social objectives because

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 2

The development of several high yielding varieties of wheat and rice in 1960 increased yields per unit area. This phase is often called the Green Revolution. However, for farmers in the developing world, agrochemicals are often too expensive, and further increase in yield with existing varieties are not possible using conventional breeding. Thus, it has not fully succeeded in making India totally self-sufficient in food with only some parts showing impressive results.

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Test: Biotechnological Applications in Agriculture (NCERT) - Question 3

Read the given statements and select the correct option. 
Statement 1: The tumour inducing plasmid (Ti plasmid) acts as a cloning vector in recombinant DNA technology.
Statement 2: The Ti plasmid which is used in the mechanisms of delivering genes to a cell remains pathogenic.

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 3

A tumour inducing Ti plasmid of Agrobacterium tumefaciens has been modified into a cloning vector which is not pathogenic to the plants, However, it is still able to use its mechanism to deliver genes of our interest into various plants.
So, the correct answer is 'Statement 1 is correct but statement 2 is incorrect'.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 4

Study the following statements regarding Bt toxins produced by bacterium Bacillus thuringiensis and select the correct one.

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 4

Soil bacterium, Bacillus thuringiensis (Bt) produces proteins that kill certain insects like lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). Bacillus thuringiensis forms some intracellular protein crystals. These crystals contain a toxic insecticidal protein. The Bt toxin protein exists as inactive toxin and is converted into an active form due to the alkaline pH of the alimentary canal that solubilises the crystals. The activated toxin binds to the surface of midgut epithelial cells and create pores which cause cell swelling and lysis and finally cause death of the insect.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 5

Which of the following statements is/are correct with regard to the disadvantages of GM crops?

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 5

The transgenic food, containing enyme produced by antibiotic gene, can cause allergies because it is a foreign protein. The bacteria present in alimentary canal can take up antibiotic resistance gene and become resistant to that antibiotic. Transgenes can endanger native species if Bt toxin is expressed in pollens which are transported by pollinator honeybees. GM crop production causes changes in natural environment which may be harmful for all organisms.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 6

Some strains of Bacillus thuringiensis can kill certain insects such as _______

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 6

Lepidopterans are an order of insects consisting of moths and butterflies. Some insects of this order can be killed by the bacteria Bacillus thuringiensis. A few examples of lepidopterans are tobacco budworm, armyworm, bettles, etc.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 7

Which of the following statements are correct regarding the process of RNA interference?

(i) This is used to prevent the infestation of protozoans.
(ii) It takes place in some eukaryotic and all prokaryotic organisms as a method of cellular defense.
(iii) The method involves silencing of a specific mRNA due to a complementary dsRNA molecule.
(iv) It is a novel strategy to produce pest-resistant plants.

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 7

RNAi or RNA interference takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific mRNA. Using Agrobacterium vectors, nematode specific genes are introduced into the host plant (tobacco plant). The introduction of DNA was such that it produced both sense and anti-sense RNA in the host cells. These two RNAs being complementary to each other formed a dsRNA (double stranded RNA) that initiated RNAi.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 8

Genetic engineering is possible, because

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 8

Genetic engineering is the artificial synthesis, isolation, modification, combination, addition and repair of the genetic material (DNA) to alter the phenotype of the host organism to suit human needs. It is the manipulation of genes by man in vitro. Restriction endonucleases play major role in genetic engineering as they can cut DNA at specific sites.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 9

Which of the following genes were introduced in cotton to protect it from cotton bollworms?

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 9

Two cry genes, crylAc and cryllAb have been incorporated in cotton. The genetically modified crop is called Bt cotton as it contains Bt toxin genes. The genes crylAc and cryllAb control cotton bollworms.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 10

'Golden rice' developed through transgene approach is enriched with

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 10

Rice is a staple food in many countries, particularly in Asia, but does not contain vitamin A or its immediate precursors. By inserting two genes from Daffodil and one gene from a bacterial species into rice plants, Swiss researchers have produced rice capable of synthesising β-carotene, the precursor of vitamin A. Vitamin A is required by all individuals as it is present in retina of eyes. Deficiency of vitamin A causes night blindness and skin disorders. This rice is called 'Golden rice' because of yellow colour of rice grains due to the presence of β-carotene.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 11

All are the biotechnological applications in order to increase food production except

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 11

Rearing of honeybees for obtaining honey and bee wax is called apiculture. It is not a biotechnological application. 

Test: Biotechnological Applications in Agriculture (NCERT) - Question 12

Agrochemical based agriculture includes

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 12

Agrochemical based agriculture is used to increase the food production. It includes use of agrochemicals such as fertilisers and pesticides.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 13

Which of the following statements is not correct regarding the genetic modification of corps?

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 13

Genetic modification has:
(i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat)
(ii) Reduced reliance on chemical pesticides (pest-resistant crops)
(iii) Helped to reduce post harvest losses
(iv) Increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil)
(v) Enhanced nutritional value of food e.g., golden rice, i.e., vitamin 'A' enriched rice.

In addition to these uses, GM has been used to create tailor-made plants to supply alternative resources to industries, in the form of starch, fuel, and pharmaceuticals. 

Test: Biotechnological Applications in Agriculture (NCERT) - Question 14

The process of RNA inteference has been used to made tovacco plant resistant to 

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 14

Meloidogyne incognita infects the roots of tobacco plants and causes great reduction in yield. Fire and Mello (1998) invented a novel strategyt to prevent this infestation. It was based on the process of RNA interference.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 15

Bt corn has been made resistant from corn borer disease by introduction of the gene

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 15

CrylAb has been introduced in Bt corn to protect it from corn borer.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 16

Which one of the following is not used as bio-fertiliser?

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 16

Bacillus thuringiensis is not used as a bio-fertitiser but it is used to create transgenic plants.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 17

Read the given statements and select the correct option

Statement 1: Foods derived from transgenic crops are called as GM foods
Statement 2: Health and food safety concerns have been raised to ensure the safety of GM foods.

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 17

Crops in which foreign genes been introduced through genetic engineering are called genetically modified crops or GM foods. There have been many health and safety concern, therefore, such foods undergo lots of examination before release.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 18

Hirudin is

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 18

Hirudin is a protein that prevents blood clotting. Its gene was chemically synthesized and was transferred into Brassica napus where hirudin accumulates in seeds. The hirudin is extracted and purified and then used as medicine.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 19

Main objective of production of herbicide resistant GM crops is to

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 19

Weeds such as Striga decrease crop yields and quality by competing with crop plants for light, water and nutrients. Weeds are to be removed with the help of herbicide (weed killer) Herbicide tolerance has been developed in maize, cotton, soybean, tobacco, etc. The main aim is to reduce herbicide accumulation in food products for health safety.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 20

First genetically modified plant commercially released in India is

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 20

The Government has agreed to allow cultivation of genetically modified Bt Cotton. Bt cotton farming has shown good results in Malwa region in punjab

Test: Biotechnological Applications in Agriculture (NCERT) - Question 21

Some of the characteristics of Bt-cotton are:

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 21

Transgenic Bt cotton, which produces its own insecticide contains a gene from a soil bacterium (Bacillus thuringiensis). Bt Cotton is usually resistant to bollworm disease of cotton

Test: Biotechnological Applications in Agriculture (NCERT) - Question 22

Study the following statements regarding organic farming and select the correct ones.
(i) It utilities genetically modified crops like Bt cotton.
(ii) It uses only naturally produced inputs like compost and biofertilisers.
(iii) It does not use pesticides and urea.
(iv) It produces vegetables rich in vitamins and minerals.

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 22

In organic farming, farmers use manures, bio fertilisers, biopesticides and biocontrol agents to increase the crop production instead of using artificial fertilisers and pesticides. It does not utilise genetic engineering.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 23

The Bt toxin is not toxic to human beings because

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 23

Conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditions which are not present in human stomach. Human stomach is acidic in nature.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 24

Which of the following agricultural challenges cannot be solved with transgenic techniques?

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 24

Transgenic techniques in crops can make crops more resistant to many detrimental factors.
This confers pest resistance and temperature adjustability and avoiding the use of harmful synthetic pesticides.
But the pant or crop does not remain completely Organic in nature.
So, the correct option is 'Public preference for organic vegetables'.

Test: Biotechnological Applications in Agriculture (NCERT) - Question 25

The protein products of the following Bt toxin genes cry I Ac and cry II Ab are responsible for controlling

Detailed Solution for Test: Biotechnological Applications in Agriculture (NCERT) - Question 25

There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.

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