Microbiology and Plant Pathology-Bacteria [IFS (Forests Services) Botany (Mains)]: Questions 1 - 6 of 6

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Question number: 1

» Microbiology and Plant Pathology » Bacteria

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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 used the

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Question number: 2

» Microbiology and Plant Pathology » Bacteria

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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

Transformati

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Question number: 3

» Microbiology and Plant Pathology » Bacteria

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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 and Bacillus.

  • In favorable condi

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Question number: 4

» Microbiology and Plant Pathology » Bacteria

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

What are the various method of genetic recombination in bacteria. (Paper 2)

Explanation

  • In bacteria sexual reproduction does not involve fusion of gametes as in other organisms but each heritable character is determined by a portion of its genetic material as in other organism.

  • Interchange of genetic material in bacteria is accomplished either by conjugation or by exotic methods.

  • In conjugation exchange of genetic material between two c

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Question number: 5

» Microbiology and Plant Pathology » Bacteria

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

Give the name of the causal organism, symptoms and measures to control a plant disease caused by a bacterium.

Explanation

Bacterial disease-

Citrus canker

Causal organism-

Xanthomonas citri

It is gram negative, Monotrichous, capsulated bacillus which is strictly aerobic in nature. it shows a yellow, copiously mucoid growth on 2 % sucrose peptone agar but on beef agar colonies are circular and straw yellow to amber yellow.

Symptoms

  • Affects all above ground parts of the plant

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Question number: 6

» Microbiology and Plant Pathology » Bacteria

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Appeared in Year: 2017

Short Answer Question▾

Write in Short

Discuss the role of transduction in genetic recombination in bacteria.

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