Biology

Microbes and Plant Diseases

1,145 Questions

Microbes and plant diseases examine the role of fungi, bacteria, and viruses in causing infections in plants and humans. Topics cover symbiotic associations like mycorrhiza, fungal structures, and specific agricultural pathogens. Practice these biology questions to master microbiology concepts for upcoming competitive examinations.

Fungal associationsPlant pathogensMicrobial structuresBacterial infections

Microbes and Plant Diseases Questions

Multiple choice

Which of the following is false about ‘fungi’?

  1. They are made of fine thread-like structures called hyphae.

  2. Most of them feed on dead things.

  3. They look like plants.

  4. They can synthesise their own food.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi are saprophytic. They do not have chlorophyll. Hence, they cannot synthesise their own food.

Multiple choice

Red tide is mostly caused by

  1. Noctiluca

  2. Gymnodinium

  3. Symbiodinium

  4. Nematodinium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Red tide is a common name for a phenomenon more correctly known as an algal bloom (large concentrations ofmicroorganisms), an event in which estuarine, marine, or fresh water algae accumulate rapidly in the watercolumn and results in discoloration of the surface water. It is usually found in coastal areas. Gymnodinium is agenus of dinoflagellates

Multiple choice

Viruses are

  1. Obligate parasites

  2. Obligate saprophytes

  3. Partial parasites

  4. Facultative parasites
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An obligate parasite is a parasitic organism that cannot live independently of its host

Multiple choice

Crown Gall is due to

  1. Agrobacterium

  2. Mycobacterium

  3. Clostridium

  4. Ewinia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Agrobacterium tumefaciens (updated scientific name: Rhizobium radiobacter) is the causal agent of crown gall disease (the formationof tumours)

Multiple choice

The scientific name of bread mould is

  1. Rhizopus artocarpi

  2. Rhizopus oligiosporus

  3. Rhizopus nigricans

  4. Rhizopus oryzae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Rhizopus nigricans is the name of bread mould which belongs to zygomycota division of fungi.