Biology/MCQs Question and Answer -Biology Set 4 Sample Test,Sample questions

Question:
 In which disease of plant white mildew appears typically on underside of leaves?

1.Cylindrocladium

2.Angular leaf Spot

3.Downy Mildew

4.Black arm of Cotton


Question:
 Name the disease of plant in which leaves, branches, fruits all are affected?

1.Spider Mites

2.Mealybugs

3. Aphids

4.Citrus Canker


Question:
Bacterial blight of Rice disease of plant is caused due to which bacteria?

1.Pseudomonas bacteria

2.Xanthomonas citri bacteria

3.Xanthomonas oryzae bacteria

4.None of the above


Question:
Bunchy top of banana plant disease is caused due to:

1.Bacteria

2.Fungus

3.Virus

4.None of the above


Question:
In which disease of plant stem rot at soil line with brown to red lesions?

1.Rhizoctonia

2.Angular leaf Spot

3.Bacterial Blight

4.Bacterial Spot


Question:
In which of the following diseases of plant chlorophyll of the leaves get destroyed and leaves get shrinked?

1. Mosaic disease of tobacco

2.Citrus Canker

3.Tundu disease of wheat

4.Rhizoctonia


Question:
 The ‘lock and key hypothesis’ mechanism is related with:

1.Digestion of fat in the body

2. For enzyme specificity

3. For the formation of vacuole

4.Explosives


Question:
Name a disease of plant in which dark to light brown rot forms around wounded plant tissue?

1.Gray Mold

2.Citrus Canker

3.Spider Mites

4.None of the above


Question:
Name a disease of plant in which fine webbing occurs on undersides of the leaves?

1.Spider Mites

2.Anthracnose

3.Mealybugs

4.Rhizoctonia


Question:
Name the disease of plant in which large yellow spot appears on the leaves?

1.Bacterial Blight

2.Bacterial Spot

3.Aphids

4.Botrytis


Question:
Which disease of plant is known as ring disease?

1.Citrus Canker

2. Black arm of cotton

3.Wilt of Potato

4.None of the above


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