Tag: biology

Questions Related to biology

Consider the following:
1. Bacillus subtilis                 2. Trichadiama viride
3. erysiphe graminis             4. Septoria glycines
Which of the above antagonistic orgaanisms is /are capable of suppressing plant disease?

  1. 1 and 2

  2. 2 and 3

  3. 2, 3 and 4

  4. 1 only


Correct Option: A

Match List-I with List-II and select the correct answer using the codes given the lists.

List-I(Disease) List-II(Pathogen)
a. Bacterial blight of paddy $1$. Pseudomonas
b. Brown rot of potato $2$. Corynebacterium
c. Tundu disease of wheat $3$. Erwinia
d. Fire blight of apples $4$. Xanthomonas
  1. A-$1$, B-$2$, C-$3$, D-$4$

  2. A-$4$, B-$1$, C-$2$, D-$3$

  3. A-$3$, B-$2$, C-$1$, D-$4$

  4. A-$2$, B-$3$, C-$4$, D-$1$


Correct Option: A

Which one of the following is a disease caused by zinc deficiency?

  1. Die back of rice

  2. Khaira disease of rice

  3. Black heart of potato

  4. Brown spot of rice


Correct Option: A

Which of the following pairs are correctly matched? Disease Causal organism.
a. Kamal bunt of wheat - Fungus
b. Khaira disease of rice- Bacterium
c. Fiji disease of sugarcane- Virus
d. Purple top of potato-Mycoplasma
Select the correct answer from the codes given.

  1. $1, 2$ and $4$

  2. $2, 3$ and $4$

  3. $1, 3$ and $4$

  4. $1, 2$ and $3$


Correct Option: A

The toxic substance produced by the pathogen causing Brown leaf spot of rice, harming seedlings reducing respiration of the host is?

  1. Piricularian

  2. A-Picolinic acid

  3. Cochliobolin

  4. Ferulic acid


Correct Option: A

Consider the following diseases of plants.
a. Root knot of sugar-cane.
b. Root rot of wheat.
c. Wilt of cotton.
d. Angular leaf spot of cotton.
Which of these diseases is/are caused by fungi?

  1. $1$ and $4$ only

  2. $2$ only

  3. $2$ and $3$

  4. $1, 3$ and $4$


Correct Option: A

Which one of the following pairs is not correctly matched?

  1. Flag smut of wheat - Ustilago nude tritici

  2. Karnal bunt of wheat- Tilletia barclayana

  3. Brown rust of wheat- Puccinia recondite

  4. Powdery mildew of wheat- Erysiphe graminis


Correct Option: A

Which one of the following diseases of rice is not caused by microbe?

  1. Tip burn of paddy

  2. Stem rot of paddy

  3. False smut of paddy

  4. Blast disease of rise


Correct Option: A

Which one of the following pairs is not correctly matched?

  1. Tikka disease of groundnut-Cercospora personata

  2. Blast of rice-Ephelis oryzae

  3. Red rot of sugar-cane-Collectotrichum falcatum

  4. Early blight of potato-Alternaria Solani


Correct Option: A

Which one of the following pairs of plant diseases and symptoms is correctly matched?

  1. Rice infected with Helminthosporium Oryzae- Blight

  2. Jute infected with Macrphoming Phaseolina- Club root

  3. Crucifer infected with Plasmodiophora Brassicae- Rot

  4. Potato infected with Synchytrium- Endobioticum wart


Correct Option: A