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

What is the primary mode of transmission for sudden oak death?

  1. Wind

  2. Birds

  3. Animals

  4. Fungi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sudden oak death is primarily transmitted by fungi, which are carried by wind or animals.

Multiple choice

What is the term for the symbiotic relationship between certain fungi and plant roots?

  1. Mycorrhizae

  2. Rhizobia

  3. Actinomycetes

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

Mycorrhizae are symbiotic associations between certain fungi and plant roots, where the fungus helps the plant absorb nutrients from the soil in exchange for carbohydrates.

Multiple choice

Which group of microorganisms is primarily responsible for the decomposition of lignin in soil?

  1. Bacteria

  2. Fungi

  3. Protozoa

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

Fungi, particularly brown-rot fungi, are the primary decomposers of lignin, a complex organic compound found in plant cell walls.

Multiple choice

Which of the following is NOT a common type of plant disease?

  1. Powdery mildew

  2. Black spot

  3. Rust

  4. Chlorosis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorosis is not a common type of plant disease, as it is caused by a lack of chlorophyll, which is essential for photosynthesis.

Multiple choice

Which of the following is NOT a common type of fungus used in mycoremediation?

  1. White-rot fungi

  2. Brown-rot fungi

  3. Aspergillus niger

  4. Trichoderma harzianum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aspergillus niger is a common fungus used in ex-situ bioremediation, not in-situ bioremediation. White-rot fungi, brown-rot fungi, and Trichoderma harzianum are all common types of fungi used in mycoremediation.

Multiple choice

Which of these is a fungal disease that affects horses' hooves and causes laminitis?

  1. Equine Influenza

  2. Equine Herpesvirus

  3. Equine Colic

  4. Equine Laminitis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Equine Laminitis is a fungal disease that affects horses' hooves, causing inflammation and separation of the hoof wall from the underlying structures, leading to lameness.

Multiple choice

Which of the following is an example of a fungus used in mycoremediation?

  1. Aspergillus niger

  2. Trichoderma reesei

  3. Penicillium chrysogenum

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

Aspergillus niger is a fungus that is commonly used in mycoremediation. It is known for its ability to degrade a wide range of pollutants, including pesticides, dyes, and heavy metals.

Multiple choice

Which of the following is NOT a common type of fungus used in bioremediation of heavy metals?

  1. Aspergillus

  2. Penicillium

  3. Trichoderma

  4. Saccharomyces
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saccharomyces is a type of yeast, not a fungus, and is not typically used in bioremediation of heavy metals.

Multiple choice

Which of the following is NOT a common type of fungus used in bioremediation of heavy metals?

  1. Aspergillus

  2. Penicillium

  3. Trichoderma

  4. Saccharomyces
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saccharomyces is a type of yeast, not a fungus, and is not typically used in bioremediation of heavy metals.

Multiple choice

Which of the following is NOT a type of fungus?

  1. Yeast

  2. Mold

  3. Mushroom

  4. Bacteria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bacteria are not fungi because they are prokaryotic organisms.

Multiple choice

What is the primary mechanism by which fungi contribute to the bioremediation of nanomaterials?

  1. Mycoremediation

  2. Phytoextraction

  3. Phytoreduction

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

Mycoremediation involves the use of fungi to degrade and remove nanomaterials from the environment.

Multiple choice

Which of the following is a common type of biological growth that can damage mosaics?

  1. Algae

  2. Fungi

  3. Lichen

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Algae, fungi, and lichen are all common types of biological growth that can damage mosaics.

Multiple choice

Mycoremediation involves the use of fungi to degrade or transform contaminants. Which of the following fungi is commonly used for mycoremediation of oil spills?

  1. Aspergillus niger

  2. Trichoderma harzianum

  3. Pleurotus ostreatus

  4. Phanerochaete chrysosporium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phanerochaete chrysosporium is a white-rot fungus that is known for its ability to degrade lignin, a major component of wood, and it is also effective in degrading a variety of other organic pollutants, including those found in oil spills.

Multiple choice

Which of the following is an example of a bioremediation technology that involves the use of fungi?

  1. Phytoremediation

  2. Mycoremediation

  3. Bioaugmentation

  4. In situ bioremediation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mycoremediation is a bioremediation technology that involves the use of fungi to degrade or transform contaminants.

Multiple choice

Which of the following diseases is caused by a fungus that is transmitted through contact with soil?

  1. Histoplasmosis

  2. Coccidioidomycosis

  3. Blastomycosis

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Histoplasmosis, coccidioidomycosis, and blastomycosis are all caused by fungi that are transmitted through contact with soil.