Tag: bacteria - friend and foe

Questions Related to bacteria - friend and foe

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

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

Reveal answer Fill a bubble to check yourself
D Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

Crown Gall is due to

  1. Agrobacterium

  2. Mycobacterium

  3. Clostridium

  4. Erwinia

Reveal answer Fill a bubble to check yourself
A Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

Agrobacterium tumefaciens causes

  1. Wilt

  2. Damping off

  3. Rust

  4. Crown gall

Reveal answer Fill a bubble to check yourself
D Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

Grown gall disease of plants is caused by

  1. Ti-plasmid

  2. Pi-Plasmid

  3. Virus

  4. Protozoan

Reveal answer Fill a bubble to check yourself
A Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

Xanthomonas citri is related to

  1. Disease in Xanthium

  2. Xanthophyceae

  3. A virus

  4. Citrus canker

Reveal answer Fill a bubble to check yourself
D Correct answer
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.' 

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

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

  1. Viruses

  2. Bacteria

  3. Mycoplasma

  4. Chlamydia

Reveal answer Fill a bubble to check yourself
D Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

Trachoma is caused by

  1. Spirochaete

  2. Chlamydia

  3. Trichonympha

  4. Paramaecium

Reveal answer Fill a bubble to check yourself
B Correct answer
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.'

Multiple choice botany bacteria bacteria - friend and foe useful and harmful bacteria bacteria; benefits and harmful effects

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

  1. Anthrax

  2. Necrosis

  3. Tick fever

  4. Rinderpest

Reveal answer Fill a bubble to check yourself
A Correct answer
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.'