Plant Diseases caused by Viruses and Bacteria MCQs and Answers

Are you looking for Plant Diseases caused by Viruses and Bacteria MCQs and Answers for medical entrance examinations? If yes, these are some most important multiple choice questions and answers on NCERT Class-12 Biology, Chapter-9 (Strategies for Enhancement in Food Production).

Here we composed these Plant Diseases caused by Viruses and Bacteria MCQs and Answers after reading the chapter on Strategies for Enhancement in Food Production from the NCERT book on Class 12 Biology. The questions are topics-wise and the students can relate the questions easily to the most important topics of this chapter.

Plant Diseases caused by Viruses and Bacteria MCQs and Answers

1. Which of the following group of viruses generally attack plants?

a) Retroviruses

b) Riboviruses

c) Rheoviruses

d) Enteroviruses

Answer: b


2. Which of the following is not a method by which viral infection spreads in plants?

a) Exuding sap of infected plants

b) Infected seeds

c) Through meristem

d) Infected pollen

Answer: c


3. Which of the following is not a method by which a virus enters a healthy host?

a) By vectors

b) Meristem

c) Infected fungal spores

d) Through wounds

Answer: b


4. Which of the following is not a common measure of controlling viral infections?

a) Using healthy virus-free seeds

b) Antibiotics

c) Using resistant varieties

d) Protection from insect vectors

Answer: b


5. Which of the following organism causes Bean Mosaic Disease in plants?

a) Virus

b) Bacteria

c) Fungi

d) Nematode

Answer: a


6. Which of the following is not a symptom of Bean Mosaic disease?

a) Plants are bunchy

b) Leaves show mottling

c) Mosaic appearance on leaves

d) Blackening of leaflets

Answer: d


7. Which of the following is not a method of overcoming the infection of Bean mosaic disease?

a) Virus-free seeds

b) Cutting leaves

c) Delayed planting

d) Sowing resistant varieties

Answer: b


8. Which of the following is not a bacterial plant pathogen?

a) Pseudomonas

b) Clostridium

c) Puccinia

d) Xanthomonas

Answer: b


9. Which of the following is not a symptom of bacterial diseases in plants?

a) Blight

b) Mosaic

c) Wilts

d) Rots

Answer: b


10. Which of the following is not a method of controlling bacterial diseases in plants?

a) Roguing of infected plants

b) Sanitation methods

c) Quarantine

d) Virus-free seeds

Answer: d


FAQs on Plant Diseases caused by Viruses and Bacteria

Q1. What are some common plant diseases caused by viruses?

Answer: Some common plant diseases caused by viruses include cucurbit yellow stunting disorder virus, impatiens necrotic spot virus, and tobacco mosaic virus. These viruses can cause stunting, yellowing, and necrosis in plants.

Q2. What are some common plant diseases caused by bacteria?

Answer: Some common plant diseases caused by bacteria include bacterial leaf spot, bacterial canker, and bacterial wilt. These diseases can cause leaf spots, cankers, and wilting in plants.

Q3. How can I prevent plant diseases caused by viruses and bacteria?

Answer: There are a few things you can do to prevent plant diseases caused by viruses and bacteria. These include:

-Avoiding planting in areas where these diseases are common

-Keeping your plants healthy and free from stress

-Practicing good hygiene and sanitation

-Using disease-resistant varieties of plants

If you do notice symptoms of a plant disease caused by a virus or bacterium, you should contact a professional for diagnosis and treatment.

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