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
  1. Phycomycetes

  2. Deuteromycetes

  3. Basidiomycetes

  4. Ascomycetes

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deuteromycetes are known as 'fungi imperfecti' because they lack a known sexual phase in their life cycle.

Multiple choice
  1. Phycomycetes

  2. Ascomycetes

  3. Basidiomycetes

  4. Deuteromyvetes

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ascomycetes are commonly referred to as 'sac fungi' because their spores are produced within a sac-like structure called an ascus.

Multiple choice
  1. Filament

  2. Mycorrhiza

  3. Lichen

  4. All

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lichens are symbiotic associations between fungi and algae. Mycorrhiza is an association between fungi and plant roots.

Multiple choice
  1. Mycelium

  2. Mycorrhiza

  3. Lichen

  4. All

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mycorrhiza is the symbiotic association between fungi and the roots of higher plants. This relationship helps the plant absorb nutrients, particularly phosphorus.

Multiple choice
  1. Heteroteophic

  2. Saprophyte

  3. Parasite

  4. All

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi are heterotrophic organisms that obtain nutrients through absorption. They can be saprophytes, parasites, or symbionts, making all the listed options correct.

Multiple choice
  1. Filament

  2. Thread

  3. Mycelium

  4. Trichome

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The body of a fungus consists of long, slender thread-like structures called hyphae. The network of these hyphae is collectively known as mycelium.

Multiple choice
  1. Fungi

  2. Monera

  3. Plantae

  4. Animalia

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mushrooms are macroscopic reproductive structures produced by fungi, specifically within the phyla Basidiomycota.

Multiple choice
  1. plant have cell wall and fungi do not

  2. fungi reproduce sexually and plants do not

  3. Plants are autotrophs and fungi are decomposers

  4. Plants are tall and fungi are not

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants are autotrophs that produce their own food via photosynthesis, whereas fungi are heterotrophs that obtain nutrients by decomposing organic matter.

Multiple choice
  1. Histoplasma capsulatum

  2. Trichoderma polysporum

  3. Trichoderma asperellum

  4. Neisseria gonorrhoeae

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cyclosporin A is an immunosuppressant drug produced by the fungus Trichoderma polysporum.

Multiple choice
  1. Butyric acid

  2. Tartaric acid

  3. Citric acid

  4. None of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aspergillus niger is an industrial fungus used for the commercial production of citric acid.

Multiple choice
  1. killing insects

  2. biological control of plant diseases

  3. controlling butterfly caterpillars

  4. producing antibiotics

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Trichoderma species are free-living fungi that are effective as biological control agents against several plant pathogens.

Multiple choice
  1. Fungi

  2. Plants

  3. Decomposers

  4. Animals

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants are the primary example of autotrophs because they use chlorophyll to capture light energy and perform photosynthesis to create their own food.