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

Ainsworth`s put Rhizopus in

  1. Zygomycotina

  2. Mastigomycotina

  3. Myxomycotina

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

Zygomycota, or zygote fungi, is a phylum of fungi. They are mostly terrestrial in habitat, living in soil or in decaying plant or animal material. Some are parasites of plants, insects, and small animals, while others form symbiotic relationships with plants. Example: Rhizopus

Multiple choice

Mushroom belongs to which of the following classes?

  1. Ascomycetes

  2. Basidiomycetes

  3. Phycomycetes

  4. Zygomycetes

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The class Basidiomycetes includes those members that produce their basidia and basidiospores on or in a basidiocarp. Mushroom is an example.

Multiple choice

Clamp connections are observed in which of the following?

  1. Basidiomycetes

  2. Zygomycetes

  3. Ascomycetes

  4. Oomycetes

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The small branches at each septum are termed as clamp connections. It is believed that the formation of clamp connections, where they occur in the dikaryons of some species, function in ensuring that each cell is binucleate.

Multiple choice

Which of the following categories is penicillium from?

  1. Bacteria from the family of lacto bacillus

  2. Fungus from the family of Trichocomaceae

  3. Virus in the family of Abaca Bunchy

  4. Protozua from the family of Sphores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Penicillium is a species of fungus from the family Trichocomaceae. It is common in temperate and subtropical regions and can be found on salted food products, but it is mostly found in indoor environments, especially in damp or water-damaged buildings. 

Multiple choice

Match the name of the disease with the causal organism.

Disease Causal organism
P. False smut of rice 1. Plasmopara viticola
Q. Ring rot of potato 2. Collectotrichum falcatum
R. Red rot of sugarcane 3. Corynebacterium sepidonicum
S. Downy mildew of grape 4. Ustilaginoidea virens
5. Erwinia amylovora
6. Synchytrium endobioticum

  1. P - 1, Q - 5, R - 2, S - 4

  2. P - 4, Q - 3, R - 2, S - 1

  3. P - 6, Q - 2, R - 4, S - 1

  4. P - 5, Q - 3, R - 2, S - 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice

What do you call an organism that lives on dead matter?

  1. A).saprophyte

  2. B).parasite

  3. C).virus

  4. D).both b & c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A saprophyte is an organism that lives on dead or decaying organic matter. Parasites live on living hosts. Viruses are infectious agents. The correct answer is saprophyte.

Multiple choice

What is the most common type of bacteria?

  1. spherical shaped

  2. rod shaped

  3. cork-screw shaped

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

Bacilli are rod-shaped bacteria and are the most common form of bacteria found in nature.

Multiple choice

What do you call a fungal infection of the skin?

  1. ringworm

  2. herpes

  3. impetigo

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

Ringworm, or tinea, is a common fungal infection of the skin. Herpes is viral, impetigo is bacterial, and folliculitis is inflammation of the hair follicle.