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 name of the virus that causes mosaic symptoms on pepper plants, resulting in distorted leaves and reduced fruit quality?

  1. Tobacco mosaic virus

  2. Cucumber mosaic virus

  3. Pepper mild mottle virus

  4. Potato virus Y
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pepper mild mottle virus is a virus that causes mosaic symptoms on pepper plants, leading to distorted leaves, reduced fruit quality, and stunted growth.

Multiple choice

Which fungal disease is known for causing damping-off in vegetable seedlings, resulting in the collapse and death of young plants?

  1. Pythium damping-off

  2. Rhizoctonia damping-off

  3. Fusarium wilt

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

Pythium damping-off is a fungal disease that affects vegetable seedlings, causing them to collapse and die due to root and stem rot.

Multiple choice

Which fungal disease causes late blight in potatoes and tomatoes, leading to rapid defoliation and fruit rot?

  1. Downy mildew

  2. Fusarium wilt

  3. Powdery mildew

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

Late blight is a fungal disease that affects potatoes and tomatoes, causing rapid defoliation and fruit rot, leading to significant crop losses.

Multiple choice

What is the name of the bacterial disease that causes angular leaf spot on cucurbit crops, resulting in angular lesions on leaves and fruits?

  1. Bacterial spot

  2. Erwinia carotovora

  3. Fire blight

  4. Angular leaf spot
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Angular leaf spot is a bacterial disease that affects cucurbit crops, causing angular lesions on leaves and fruits, leading to reduced plant vigor and yield.

Multiple choice

What is the common name for the fungal disease that causes Fusarium wilt in tomatoes, resulting in yellowing and wilting of leaves?

  1. Downy mildew

  2. Fusarium wilt

  3. Powdery mildew

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

Fusarium wilt is a fungal disease that affects tomatoes, causing yellowing and wilting of leaves, leading to reduced fruit production and plant death.

Multiple choice

What is the name of the fungal disease that causes Botrytis blight in vegetables, resulting in soft rot and gray mold on affected plant tissues?

  1. Downy mildew

  2. Fusarium wilt

  3. Powdery mildew

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

Botrytis blight is a fungal disease that affects various vegetables, causing soft rot and gray mold on affected plant tissues, leading to reduced yields and quality.

Multiple choice

Which bacterial disease is responsible for causing fire blight in apple and pear trees, resulting in blackened leaves, blossoms, and fruit?

  1. Bacterial spot

  2. Erwinia carotovora

  3. Fire blight

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

Fire blight is a bacterial disease that affects apple and pear trees, causing blackened leaves, blossoms, and fruit, leading to reduced yields and tree death.

Multiple choice

Which fungal disease causes black rot in crucifers, resulting in dark, sunken lesions on leaves, stems, and pods?

  1. Downy mildew

  2. Fusarium wilt

  3. Powdery mildew

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

Black rot is a fungal disease that affects crucifers, causing dark, sunken lesions on leaves, stems, and pods, leading to reduced plant vigor and yield.

Multiple choice

What is the scientific name of the Indian Myxomycete commonly known as the 'Flowering Slime'?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Physarum polycephalum is a slime mold commonly known as the 'Flowering Slime' due to its ability to form intricate network-like structures that resemble flowers.

Multiple choice

Which Indian Myxomycete is known for its ability to solve mazes?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Physarum polycephalum is known for its ability to solve mazes by forming network-like structures that follow the shortest path between two points.

Multiple choice

Which Indian Myxomycete is commonly known as the 'Wolf's Milk Slime'?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Fuligo septica is commonly known as the 'Wolf's Milk Slime' due to its milky appearance and its ability to grow on decaying wood.

Multiple choice

Which Indian Myxomycete is known for its ability to form fruiting bodies that resemble bird's nests?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Stemonitis fusca is known for its ability to form fruiting bodies that resemble bird's nests, with a dark brown spore mass supported by a slender stalk.

Multiple choice

Which Indian Myxomycete is commonly known as the 'Social Amoeba'?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Dictyostelium discoideum is commonly known as the 'Social Amoeba' due to its ability to form multicellular structures called fruiting bodies through a process of aggregation and differentiation.

Multiple choice

Which Indian Myxomycete is known for its ability to produce bioluminescent light?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Physarum polycephalum is known for its ability to produce bioluminescent light, emitting a faint glow in dark conditions.

Multiple choice

Which Indian Myxomycete is known for its ability to form plasmodium, a large multinucleated mass of cytoplasm?

  1. Physarum polycephalum

  2. Fuligo septica

  3. Stemonitis fusca

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

Physarum polycephalum is known for its ability to form plasmodium, a large multinucleated mass of cytoplasm that can grow to several centimeters in size.