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

Rust is caused by

  1. Fungi

  2. Viruses

  3. Bacteria

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

Rust in plants, such as wheat rust, is a disease caused by parasitic fungi. It is not caused by viruses, bacteria, or protozoa.

Multiple choice biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

Match the columns

i) Yeast a) Causing AIDS
ii) Virus b) Baking of bread
iii) Rhizobium c) Fixing nitrogen

  1. I- c, II- b, III- a

  2. I- a, II- b, III- c

  3. I- b, II- a, III- c

  4. I- b, II- c, III- a
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  1. Yeast -  Saccharomyces cerevisiae is the scientific name for baker's yeast.
  2. Virus - HIV or Human immunodeficiency virus is the virus which causes AIDS
  3. Rhizobium - These are the bacteria that fix nitrogen after becoming established inside the root nodules of legumes.
 So the correct answer is I- b, II-a, III- c.

Multiple choice innate and learned behaviour option a: neurobiology and behaviour biology

LSD is obtained from

  1. Fungus

  2. Lichen

  3. Alga

  4. Bacterium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
LSD (Lysergic acid diethylamide) are powerful hallucinogens. They are obtained from the sclerotia of ergot fungus, Claviceps purpurea, present on rye plant. They are natural and powerful hallucinogens that change mood, behaviour and thoughts. They may cause pleasant or unpleasant sensations in the body. They effect cerebrum and sense organs and produce euphoria (excitement).
So, the correct answer is 'Fungus'.
Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

The free-living fungus Trichoderma can be used for:

  1. killing insects

  2. biological control of plant diseases

  3. controlling butterfly caterpillars

  4. producing antibiotics
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Trichoderma species are free living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens like Fusarium, Phytopthora etc and used in the treatment of plant diseases.

So, the correct answer is 'biological control of plant diseases' 

Multiple choice botany families of angiosperms family fabaceae eudicots family - fabaceae, sativum and solanaceae study of some important families

Lathyrism is caused by

  1. Dal

  2. Moth dal

  3. Khesari dal

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

Lathyrism is a neurological disorder in humans. It is caused due to consumption of legume belonging to genus Lathyrus, particularly  Lathyrus sativus  or Khesari dal. The cause of the disease is due to neurotoxin ODAP ($\beta$ - oxalyl,L $\alpha$ - diaminopropionic acid) which is structural analogue of  neurotransmitter glutamate. Which results in paralysis of the lower limbs.

So, the correct answer is 'khesari dal'

Multiple choice

Which of the following is NOT a common type of fruit tree disease?

  1. Apple Scab

  2. Powdery Mildew

  3. Fire Blight

  4. Nitrogen Deficiency
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nitrogen Deficiency is not a common type of fruit tree disease. Apple Scab, Powdery Mildew, and Fire Blight are all common diseases that can affect fruit trees.