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 animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

The following microbe is used as a biological weapon recently

  1. Phytophthora infestans

  2. Bacillus anthracis

  3. Hibiscus virus

  4. all of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Bacillus anthracis is the bacteria that causes anthrax. In 1991 Gulf War it is used by Iraq. They purchased anthrax spores from the US.
So, the correct option is 'Bacillus anthracis'
Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of the following microorganisms causes ringworm?

  1. Bacteria

  2. Protozoa

  3. Fungi

  4. Virus

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ringworm is a skin infection which is characterized by the formation of a ring-like a pattern in the rash. It is caused by the fungal species name Tenia. The ringworm infection can occur in different parts of the body like feet, armpits, scalp, thighs, groin, etc.

Thus, the correct answer is option C. 

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of these pathogens causes ringworm and athlete's foot?

  1. Protozoa

  2. Bacteria

  3. Fungi

  4. Algae

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Athlete's foot and ringworm are caused by fungus. They are collectively known as tinea. Ringworm is caused by a worm known as ringworm. It is characterised by ring-like red patches on the skin.

Athelete foot is mainly caused in between the fingers of the toes due to excessive sweating or moisture.
So, the correct answer is option C.

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of the following is a fungal disease in human?

  1. Athletes food disease

  2. Foot and mouth disease

  3. Leukoderma

  4. Proriasis

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Athlete's foot is a common fungal infection of the skin, especially between the toes. Foot and mouth disease is a viral disease affecting animals. Leukoderma (vitiligo) is a pigmentation disorder, and psoriasis is an autoimmune skin condition - neither is fungal.

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Causative agent of Athlete's foot disease is _________.

  1. Tinea

  2. Ascaris

  3. Aspergillus

  4. Candida

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Tinea is the name of a group of diseases caused by a fungus.
  • Types of tinea include ringworm, athlete's foot and jock itch. 
  • You can get them by touching an infected person, from damp surfaces such as shower floors, or even from a pet. 
  • Hence, the Causative agent of Athlete's foot disease is Tinea.
  • So, the correct answer is 'Tinea'.
Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Ringworm in humans is caused by

  1. Viruses

  2. Bacteria

  3. Fungi

  4. Nematodes

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ringworm is a common fungal infection of the skin and is not due to the worm. The condition is named for the site of the body where the infection occurs. It causes a scaly, crusted rash that may appear round, red patches on the skin.
So, the correct answer is 'Fungi'

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Name the disease which is caused by fungus.

  1. Cancer

  2. Parkinsons

  3. Typhoid

  4. Ergot

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Ergot is a fungal disease of cereal grasses, especially rye, caused by species of the ascomycete fungus Claviceps.
  • Typhoid fever is caused by Salmonella typhi bacteria.
  • Parkinson's disease (PD) is a neurodegenerative disorder that affects the nerve cells in the brain that produce dopamine. It is not caused by bacteria or fungi.
  • Cancer results when cellular changes cause the uncontrolled growth and division of cells, hence it is not caused by any infectious agent.

Hence answer is 'Ergot'
Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

A fungal disease of humans is due to :

  1. Typhoid

  2. Trichophyton

  3. Microsporum

  4. Both B and C

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Typhoid is an enteric fever caused by the bacterium salmonella thyphi. Hence typhoid is not a fungal disease.
  • Trichophyton is a genus of fungi, which includes the parasitic varieties that cause diseases such as tinea, including athlete's foot, ringworm, jock itch, and similar infections of the nail, beard, skin, and scalp.
  • Microsporum is a genus of fungi that causes tinea capitis, tinea corporis, ringworm diseases.
  • Hence Trichophyton and Microsporum cause fungal disease in Humans.
  • So, the correct answer is 'Both B and C'.
Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

The pathogen Microsporum responsible for ringworm diease in humans belongs to the same kingdom of organisms as that of :

  1. Taenia - a tapeworm

  2. Wuchereria - a filarial worm

  3. Rhizopus - a mould

  4. Ascaris - a roundworm

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of Rhizopus - a mold(a fungus that grows in the form of multicellular filaments called hyphae)because both Microsporum and Rhizophus belong to kingdom Fungi.
  • So, the correct answer is 'Rhizopus - a mould'.
Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Ringworm in humans caused by

  1. Fungi

  2. Nematodes

  3. Viruses

  4. Bacteria

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Ringworm or Dermatophytosis is a fungal infection caused by Dermatophytosis (Trichophyton and Microsporum fungi).
  •  The causative agent feeds on Keratin. 
  • Symptoms and Stages of a Ringworm Infection Itchy skin.,Red, scaly, or cracked skin.,A ring-shaped rash (from which ringworm gets its name), Hair loss in the affected area (if the hair was present).Hence Ringworm in humans caused by Fungi.
  • So, the correct answer is 'Fungi'.