Tag: bacteria - friend and foe

Questions Related to bacteria - friend and foe

In bacterial$/$ tissue culture, glassware and nutrients are sterilized through

  1. Water bath at $200^o$C

  2. Dry air oven at $200^o$C

  3. Dehumidifier

  4. Autoclave


Correct Option: D
Explanation:

Sterilization by autoclaving is carried out to kill bacteria and other pathogens present in the nutrients, equipment, and materials. In bacterial/ tissue culture, glassware and nutrients are sterilized through autoclave. In this, a pressurized steam is applied with the heat of 121$^0$C for around 15–20 minutes to kill bacteria, spores, and other pathogens.

Thus, the correct answer is 'Autoclave.'

Crown Gall is due to

  1. Agrobacterium

  2. Mycobacterium

  3. Clostridium

  4. Erwinia


Correct Option: A
Explanation:

Crown gall disease is a plant disease that is caused by the bacterium Agrobacterium tumefaciens. It results in the overgrowth appearing as knobbly swellings or galls on stems, roots, trunks, and branches. It affects mostly woody shrubs and herbaceous plants like grapes, raspberries, blackberries, and roses.

Thus, the correct answer is 'Agrobacterium.'

Disease pneumonia is due to

  1. Virus

  2. Bacterium

  3. Cyanobacterium

  4. Protozoan


Correct Option: B
Explanation:

Pneumonia is a lung disease caused by bacteria Streptococcus pneumoniae. It causes inflammation of alveoli of lungs. Symptoms include dry cough, chest pain, fever, difficulty breathing.

Thus, the correct answer is 'Bacterium.'

Agrobacterium tumefaciens causes

  1. Wilt

  2. Damping off

  3. Rust

  4. Crown gall


Correct Option: D
Explanation:

Crown gall disease is a plant disease that is caused by the bacterium Agrobacterium tumefaciens. It results in the overgrowth appearing as knobbly swellings or galls on stems, roots, trunks, and branches. It affects mostly woody shrubs and herbaceous plants like grapes, raspberries, blackberries, and roses.

Thus, the correct answer is 'Crown gall.'

Grown gall disease of plants is caused by

  1. Ti-plasmid

  2. Pi-Plasmid

  3. Virus

  4. Protozoan


Correct Option: A
Explanation:

Crown gall disease is a plant disease that is caused by the bacterium Agrobacterium tumefaciens. Ti plasmid is essential to cause disease. It transfers bacterial DNA into the host cell where it incorporates itself into the host genome. It results in the overgrowth appearing as knobbly swellings or galls on stems, roots, trunks, and branches. It affects mostly woody shrubs and herbaceous plants like grapes, raspberries, blackberries, and roses.

Thus, the correct answer is 'Ti-plasmid.'

Xanthomonas citri is related to

  1. Disease in Xanthium

  2. Xanthophyceae

  3. A virus

  4. Citrus canker


Correct Option: D
Explanation:

Citrus canker is a disease that is caused by the bacterium Xanthomonas axonopodis. It affects the Citrus species of fruits such as lime, oranges, grapefruit. It results in the lesions on the leaves, stems, fruit and other parts of the citrus plants.

Thus, the correct answer is 'Citrus canker.' 

Which of the following organism can be a reason for abortion?

  1. Viruses

  2. Bacteria

  3. Mycoplasma

  4. Chlamydia


Correct Option: D
Explanation:

Abortion is the method of ending the pregnancy by removal of either embryo or foetus. Chlamydia is a sexually transmitted infection. Chlamydia may result into Pelvic Inflammatory Disease (PID). It can lead to serious consequences like infertility, ectopic pregnancy and even abortion.

Thus, the correct answer is 'Chlamydia.'

Trachoma is caused by

  1. Spirochaete

  2. Chlamydia

  3. Trichonympha

  4. Paramaecium


Correct Option: B
Explanation:

Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. It results in the roughening of the inner surface of the eyelids. The symptoms include pain in the eyes, itching and irritation in the eyes, blindness. It is a contagious disease.

Thus, the correct answer is 'Chlamydia.'

The disease crown gall is caused by

  1. Algae

  2. Fungi

  3. Virus

  4. Bacteria


Correct Option: D

The infectious and contagious bacterial disease that affects cattle, buffaloes, horses, sheep and goats is

  1. Anthrax

  2. Necrosis

  3. Tick fever

  4. Rinderpest


Correct Option: A
Explanation:

Anthrax is an infectious disease caused by bacterium Bacillus anthracis. It mainly affects rudiments like cattle, buffaloes, horses, sheep. It rarely occurs in humans. Symptoms include sore throat, mild fever, fatigue, muscle aches.

Thus, the correct answer is 'Anthrax.'