Biology

Microbes and Plant Diseases

1,118 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 scientific name of the fungus that causes barley stem rust?

  1. Puccinia graminis f. sp. hordei

  2. Puccinia recondita f. sp. hordei

  3. Puccinia striiformis f. sp. hordei

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

Puccinia graminis f. sp. hordei, Puccinia recondita f. sp. hordei, and Puccinia striiformis f. sp. hordei are all fungi that cause barley stem rust.

Multiple choice

Which of the following is a common disease of barley?

  1. Barley stem rust

  2. Barley leaf rust

  3. Barley stripe rust

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

Barley stem rust, barley leaf rust, and barley stripe rust are all common diseases of barley.

Multiple choice

What is the role of fungi in the bioremediation of petroleum hydrocarbons?

  1. They can degrade a wide range of hydrocarbons

  2. They produce enzymes that break down hydrocarbons

  3. They can tolerate extreme environmental conditions

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

Fungi play a significant role in the bioremediation of petroleum hydrocarbons. They can degrade a wide range of hydrocarbons, produce enzymes that break down hydrocarbons, and tolerate extreme environmental conditions. This makes them valuable agents for the bioremediation of contaminated sites.

Multiple choice

Which of the following is NOT a type of microbial pathogen?

  1. Bacteria

  2. Archaea

  3. Fungi

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

Archaea are not known to be microbial pathogens, although some species can be opportunistic pathogens in certain circumstances.

Multiple choice

Mycorrhizae are a type of symbiotic relationship between fungi and plants. True or False?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mycorrhizae are a type of mutualistic symbiosis between fungi and plants, where the fungus helps the plant absorb water and nutrients from the soil, while the plant provides the fungus with carbohydrates.

Multiple choice

What is the term used to describe the phenomenon where viruses infect and lyse bacteria, leading to a decrease in bacterial abundance and an increase in phytoplankton biomass?

  1. Bacterial shunt

  2. Bacterial loop

  3. Bacterial lysis

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

Bacterial shunt is the phenomenon where viruses infect and lyse bacteria, leading to a decrease in bacterial abundance and an increase in phytoplankton biomass.

Multiple choice

Which of the following is a common type of disease that affects local agriculture?

  1. Bacterial wilt

  2. Fungal blight

  3. Viral mosaic

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

Fungal blights are caused by fungi that attack the leaves, stems, or fruits of plants. They can cause significant damage to crops by reducing plant growth and yield.

Multiple choice

What is the causative agent of ringworm?

  1. Bacteria

  2. Virus

  3. Fungus

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

Ringworm, also known as tinea, is a fungal infection of the skin. It is caused by a group of fungi called dermatophytes, which thrive on keratin, a protein found in the skin, hair, and nails.