Microbiology and Plant Pathology (IFS Botany): Questions 1 - 10 of 12

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Question number: 1

» Microbiology and Plant Pathology » Major Plant Diseases

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write short notes on the following: Tundu disease of wheat (Paper-1, Section-A)

Explanation

  • Tundu disease of wheat is also called as yellow Ear rot or Ear cockle.

  • Tundu is a minor disease problem worldwide.

  • It is quite common in north-west regions of India.

  • This disease of wheat was first reported by Hutchinson in 1917 from Punjab.

  • Now it is spread in many other… (277 more words) …

Question number: 2

» Microbiology and Plant Pathology » Bacteria

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the role of microbes in production of antibiotics. (Paper-1, Section-A)

Explanation

Definition

Antibiotics are the chemical substances that can inhibit the growth and destroy the microorganisms.

  • Antibiotics are chemicals that kill or inhibit the growth of bacteria and are used to treat bacterial infections.

  • Antibiotics are derived from microorganisms or living system through fermentation process.

  • Over 2, 500 years ago, Chinese… (190 more words) …

Question number: 3

» Microbiology and Plant Pathology » Fungal Toxins

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the use of Bordeaux mixture? How is it prepared? (Paper-1, Section-A)

Explanation

Definition

  • Bordeaux mixture is a combination of copper sulfate, lime, and water.

  • Bordeaux mixture is an effective fungicide and bactericide that has been used for decades to control diseases of fruit and nut trees, vine fruits and ornamental plants.

  • Bordeaux mixture is an outstanding fungicide and bactericide for controlling some… (194 more words) …

Question number: 4

» Microbiology and Plant Pathology » Viruses

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain the structure of TMV. (Paper-1, Section-A)

Explanation

Full name of TMV is Tobacco mosaic virus.

Structure

  • The structure of tobacco mosaic virus (TMV) is impossible to see with the human eye because it is very small, mainly 300 nanometers long.
  • The basic components of all viruses are as much as the same.
Various types of virus & its parts

Various Types of Virus &… (310 more words) …

Question number: 5

» Microbiology and Plant Pathology » Bacteria

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What are the various methods of genetic recombination in bacteria? (Paper-1, Section-A)

Explanation

  • Genetic recombination is a process where genetic materials, contained in two separate genomes, are brought together within one unit.

  • Genetic recombination is when genes from two different sources are combined to form a new genetic combination.

In bacteria the recombination takes place by three methods;

  • Transformation

  • Transduction

  • Conjugation

Transformation:

  • Transformation… (389 more words) …

Question number: 6

» Microbiology and Plant Pathology » Major Plant Diseases

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write short note on: Powdery mildew diseases in plants (Paper-1, Section-A)

Explanation

Definition:

  • Powdery mildew is a fungal disease of the foliage, stems and occasionally flowers and fruit where a superficial fungal growth covers the surface of the plant.

  • Powdery mildews are a group of related fungi which attack a wide range of plants, causing a white, dusty coating on leaves, stems… (310 more words) …

Question number: 7

» Microbiology and Plant Pathology » Bacteria

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Endospore formation in bacteria and its significance (Paper 1, Section A)

Explanation

  • An endospore is an extremely resistant dormant cell structure produced by some bacterial species.

  • Endospore means; endo means inside and spore means to the dormant structure, so the endospore is a structure formed inside the cell.

  • There are many examples of endospore forming bacteria.

  • The two most common are Clostridium… (388 more words) …

Question number: 8

» Microbiology and Plant Pathology » Physiology of Parasitism & Control

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Write short note on the following: Soil solarization and its use to control nematodes in soil (Paper 1, Section A)

Explanation

Defining soil solarization:

  • Soil solarization is a hydrothermal process which occurs in moist soil when covered by plastic film and heated by exposure to sunlight during the warm months.

  • The process changes physical, chemical, and biological properties and thereby improves soil health.

  • Soil solarization is a nonchemical method for controlling… (353 more words) …

Question number: 9

» Microbiology and Plant Pathology » Viruses

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Write a brief account of the following: Lytic and Lysogenic cycle (Paper 1, Section A)

Explanation

Lytic and lysogenic cycles are two different methods of viral replication.

While they are different, they can be interchangeable or the replication can involve both methods in separate phases.

  • The Lytic Cycle:

  • In the lytic cycle, which is considered the main cycle in viral replication, once the viral DNA enters… (396 more words) …

Question number: 10

» Microbiology and Plant Pathology » Applications

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Biopesticides (Paper 1, Section A)

Explanation

  • Biopesticides are certain types of pesticides derived from such natural materials as animals, plants, bacteria, and certain minerals.

  • Biopesticides are those biological agents that are used for control of weeds, insects and pathogens.

  • The micro-organisms used as biopesticides are viruses, bacteria, protozoa, fungi and mites.

Classes of Biopesticides:

  • Biochemical pesticides… (252 more words) …

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