Plant Biotechnology Online Multiple Choice Test 10

1. What are the essential characteristics of a cloning vector?

• Bacterial cells cannot survive without it
• Bacterial cells replicate it
• Bacterial cells take it up
• Both b and c

2. Which bacteria are known as natural genetic engineer of plants?

• Agrobacterium tumefaciens
• E.coli
• Bacillus sp
• Streptomyces sp

Plant Biotechnology MCQs Part 9

Neeraj Girdhar

1. What is the shape of root nodules?

• Spherical
• Circular
• Oval
• Rectangle

2. Root nodule is formed by the _________ of the root cells.

• elongation
• circularization
• curling
• proliferation

3. Proliferation of root nodule is induced by the bacterium _______.

• Anabena
• Azomonas
• Rhizobium
• Azospirillum

4. Fe-protein part of nitrogenase enzyme can also be called as _______.

• dinitrogen reductase
• dinitrogenase
• reductase
• dinitrogen

5. Fe-Mo-protein part of nitrogenase enzyme can also be called as _______.

• dinitrogen reductase
• dinitrogenase
• reductase
• dinitrogen

6. Preparation of microorganism which on adding to the soil to improve the fertility of the soil is known as _______.

• biofertilizers
• vermicompost
• fertilizers
• composting

7. Biofertilizers which converts nitrogen into nitrogenous compound are called as ________ fixers

• dinitrogen
• nitrogen
• ammonia
• nitric acid

8. Which one of the following is considered to be the best nitrogen fixers for biofertilizers?

• Anabena
• Azomonas
• Rhizobium
• Azospirillum

9. who reported the suspension cultures from carrot root explant?

• Watson and Crick
• Steward and Shantz
• Benthaman and Hook
• Lederber and Tatum

10. What is a cloning vector?

• An agent used to transfer DNA from an in vitro solution into a living cell
• The sticky end of a DNA fragment
• The laboratory apparatus used to clone genes
• A DNA probe used to locate a particular gene in the genome

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Correct answers:

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Plant Biotechnology MCQs Part 8

1. ________ fixes molecular nitrogen in the roots of leguminous plant.

• Rhizobium species
• Bacillus species
• Clostridium species
• Staphylococcus species

2. Rizobium is a Gram ______ bacterium

• negative rod
• negative spherical
• positive rod
• positive spherical

3. Nodule bacteria were isolated by _______.

• Watson
• Crick
• Nitesh
• Beijernck

4. Nodule bacteria were isolated by Beijernck in ______.

• 1988
• 1888
• 1788
• 1688

5. Conversion of molecular nitrogen into ammonia by free living organism is called __________ nitrogen fixation.

• atmospheric
• industrial
• nonsymbiotic
• symbiotic

6. Conversion of molecular nitrogen into ammonia by organism in the root itself is called __________ nitrogen fixation.

• atmospheric
• industrial
• nonsymbiotic
• symbiotic

7. Non symbiotic nitrogen fixers are _______.

• bacteria
• virus
• fungi
• nematodes

8. Non symbiotic nitrogen fixing bacterium is _______.

• Anabena
• Azomonas
• Rhizobium
• Klebsiella

9. Non symbiotic nitrogen fixing cyanobacterium is _______.

• Anabena
• Azomonas
• Rhizobium
• Klebsiella

10. Heterocyst is the structure present in _______.

• Anabena
• Azomonas
• Rhizobium
• Azospirillum

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Plant Biotechnology MCQs Parts => 1.. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9..

Animal Biotechnology MCQs Part 10

1. Which statement is NOT true about a retrovirus?

• It may cause cancer or AIDS
• It contains reverse transcriptase
• It is known to cause diseases only in animals, not in humans
• It has the capacity to integrate cDNA into the host DNA of the cell it infects

2. Blood cells that transport oxygen within the body are the _____________ .

• plasma
• erythrocytes
• platelets
• leukocytes

Plant Biotechnology MCQs Part 7

1. Gene silencing is generally termed as __________ of genes.

• switching off
• switching on
• absence
• presence

2. Production of ethylene is inhibited by antisense gene________.

• glyphoshate
• ACC synthase
• ACC synthatase
• lyase

3. ____________ is responsible for fruit ripening.

• Glyphoshate
• ACC synthase
• ACC synthatase
• Polygalacturonidase

4. Which one of the following technique is used to produce Flavr Savr tomato?

• rDNA technology
• Trangenesis
• Antisense RNA technology
• rRNA technology

5. Preservation of germplasm in the frozen state is termed as _______.

• cryoprectectant
• cryopreservation
• preservation
• storage

6. Conversion of molecular nitrogen into nitrogenous compound is called as _______.

• nitrogen fixation
• nitrogen adsorption
• nitrogen dissociation
• nitrogen absorption

7. Conversion of molecular nitrogen into nitrogenous compound through lightening is called as __________ nitrogen fixation.

• atmospheric
• industrial
• biological
• symbiotic

8. Conversion of molecular nitrogen into nitrogenous compound through chemical is called __________ nitrogen fixation

• atmospheric
• industrial
• biological
• symbiotic

9. Conversion of molecular nitrogen into nitrogenous compound through living organism is called __________ nitrogen fixation

• atmospheric
• industrial
• biological
• symbiotic

10. Which one of the following is NOT nitrogen fixer?

• Rhizobium species
• Bacillus species
• Clostridium species
• Staphylococcus species

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Plant Biotechnology MCQs part 6

1. Who first succeeded in promoting the development of callus tissue?

• Gautheret
• Nobecourt
• Can Overbeek
• Conklin

2. Which of the below statement is CORRECT for the callus culture?

• Aseptic preparation of plant material
• Selection of suitable nutrient medium
• Incubation of culture
• All the above

3. For callus culture the manipulation sequence forceps, scalpels must kept in _____% ethanol.

• 90
• 95
• 80
• 85

4. The callus tissue formation is processed through _______ of the explant.

• cell alteration
• cell lengthening
• cell expansion
• cell stringent

5. 2, 4-D alone is sufficient for _______ culture.

• callus
• organ
• anther
• pollen

6. _______ is required for growth of cell.

• Gibberrellin
• Auxin
• Cytokinin
• Ethylene

7. _____ is required for cell division

• Gibberrellin
• Auxin
• Cytokinin
• Ethylene

8. Callus is yellow due to synthesis of ______ pigments

• carotenoid
• anthocyanin
• chlorophyll
• phycocyanin

9. Callus is purple due to accumulation of ____________.

• carotenoid
• anthocyanin
• chlorophyll
• phycocyanin

10. Which one of the following is a type of culture in which single cells or small aggregates of cells multiply?

• Micropropagation
• Organogenesis
• Callus culture
• Suspension culture

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Correct answers:

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