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

Which disease is caused by the fungus Cronartium ribicola and affects white pines, leading to stem cankers and growth reduction?

  1. White pine blister rust

  2. Chestnut blight

  3. Dutch elm disease

  4. Sudden oak death
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White pine blister rust is caused by the fungus Cronartium ribicola and affects white pines, causing stem cankers and growth reduction.

Multiple choice

Which of the following is a common disease that can affect vegetable crops?

  1. Powdery mildew

  2. Blight

  3. Root rot

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

Powdery mildew, blight, and root rot are all common diseases that can affect vegetable crops, causing damage to leaves, stems, roots, and fruits.

Multiple choice

Which type of microorganism is commonly found in spacecraft environments and can pose a health risk to astronauts?

  1. Bacteria

  2. Fungi

  3. Protozoa

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

Bacteria are the most prevalent type of microorganism found in spacecraft environments. They can survive in extreme conditions and some species can cause infections and diseases in humans.

Multiple choice

Which of the following diseases is a major challenge for organic farmers?

  1. Powdery mildew

  2. Downy mildew

  3. Rust

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

Powdery mildew is a fungal disease that can infect a wide variety of crops. It can cause significant damage by reducing plant growth and yield.

Multiple choice

Which of the following is NOT a type of mushroom?

  1. Agaricus bisporus

  2. Pleurotus ostreatus

  3. Lentinula edodes

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

Amanita muscaria is not a mushroom, but a member of the family Amanitaceae.

Multiple choice

What is the primary mechanism by which fungi cause disease?

  1. By producing toxins

  2. By invading and destroying host cells

  3. By stimulating the host's immune response

  4. By competing with the host for nutrients
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fungi cause disease by invading and destroying host cells. They do this by secreting enzymes that break down the host cell wall, allowing the fungus to enter the cell and multiply.

Multiple choice

What is the primary cause of fungal growth on photographs?

  1. High humidity

  2. Exposure to light

  3. Improper storage

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

High humidity is the primary cause of fungal growth on photographs.

Multiple choice

Which disease commonly affects paddy plants in the Eastern Coastal Plains?

  1. Blast

  2. Blight

  3. Tungro

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

Paddy plants in the Eastern Coastal Plains are susceptible to diseases such as blast, blight, and tungro.

Multiple choice

What is the primary cause of mold growth on art objects?

  1. Visible light

  2. Infrared light

  3. Ultraviolet light

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

High humidity can cause mold to grow on art objects, which can lead to damage.

Multiple choice

What is the primary cause of pest infestation in art objects?

  1. Visible light

  2. Infrared light

  3. Ultraviolet light

  4. Poor storage conditions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Poor storage conditions, such as high humidity and temperature, can attract pests to art objects.

Multiple choice

Which protozoan parasite causes giardiasis, a common waterborne disease?

  1. Giardia lamblia

  2. Cryptosporidium parvum

  3. Entamoeba histolytica

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

Giardia lamblia is the protozoan parasite responsible for giardiasis, characterized by symptoms such as diarrhea, abdominal pain, and nausea.

Multiple choice

Which of the following is an example of a parasitic relationship between microorganisms?

  1. Mycorrhizal fungi and plants

  2. Nitrogen-fixing bacteria and legumes

  3. Pathogenic bacteria and their hosts

  4. Predator bacteria and their prey
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pathogenic bacteria are parasites that cause disease in their hosts.

Multiple choice

Which of the following is an example of a cave-dwelling fungus?

  1. Penicillium

  2. Aspergillus

  3. Rhizopus

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

Penicillium, Aspergillus, and Rhizopus are all examples of cave-dwelling fungi.

Multiple choice

What is the term for the study of cave-dwelling fungi?

  1. Spelunking

  2. Cave Mycology

  3. Troglofungi

  4. Subterranean Fungal Ecology
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Troglofungi is the study of cave-dwelling fungi.

Multiple choice

Which of the following is NOT a common type of microbial contamination found in pharmaceutical products?

  1. Bacteria

  2. Viruses

  3. Endotoxins

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

Protozoa are not typically found in pharmaceutical products, as they require a living host to survive.