Which one of the following helps in absorption of phosphorus from soil by plants?

  • Rhizobium

  • Anabaena

  • Frankia

  • Glomus

Secondary sewage treatment is mainly a

  • mechanical process

  • chemical process

  • biological process

  • physical process

The most common substrate used in distilleries for the production of ethanol is

  • soya meal

  • ground gram

  • molasses

  • corn meal

Select the correct statement from the following

  • Biogas is produced by the activity of aerobic bacteria on animal waste

  • Methanobacterium is an aerobic bacterium found in rumen of cattle.

  • Biogas, commonly called gobar gas, is pure methane

  • Activated sludge-sediment in settlement tanks of sewage treatment plant is a right source of aerobic bacteria

A common biocontrol agent for the control of plant disease is 

  • Baculovirus

  • Bacillus thuringiensis

  • Glomus

  • (d) Trichoderma

Which one of the following is not used in organic farming?

  • Glomus

  • Earthworm

  • Oscillatoria

  • Snail

Which of the following plant species you would select for the production of bioethanol?

  • Brassica

  • Zea mays

  • Pongamia

  • Jatropha

Which of the following is not used as a biopesticide?

  • Bacillus thuringiensis

  • Trichoderma harzianum

  • Nuclear Polyhedrosis Virus (NPV)

  • Xanthomonas campestris

Probiotics are:

  • safe antibiotics

  • cancer induding microbes

  • new kind of food allergens

  • live microbial food supplement

A compound which is produced by an organism that inhibits growth of other organism is

called:

  • xenobiotics                         

  • antibiotic

  • antibody                             

  • interferon

Select the correct statement

 

  •  Acetobacter aceti produces citric acid.

  •  Saccharomyces cerevisiae is used as clot buster

  •  Penicillium notanum restrict the growth of Staphylococci

  • Methanogens are found in aerobic conditions.

Which of the following statements is incorrect regarding fermentation ?

 

  • Propionibacterium is used to ferment the cheese.

  • The puffed-up appearance of dough is due to the production of CO2 gas. 

  • Fermentation in muscle produces ethanol.

  • Toddy is made by fermenting sap from palms.

Which of the following statements is correct ?

  • Aspergillus niger is used for producing cyclosporin A.

  • Activated sludge is digested by aerobic bacteria to produce marsh gas.

  • Fleming, Chain & Florey were awarded with Nobel Prize for discovering penicillin.

  • BOD is amount of oxygen produced by bacteria on decomposition. 

Which of the following microbes is correctly paired with its function ?

  • Aspergillus niger - Production of lactic acid

  • Trichoderma polysporum  - Lowers blood cholesterol

  • Saccharomyces cerevisiae  - Production of citric acid

  • Methanogenic bacteria - Gobar gas formation 

Select the correct pair of microorganism and the product obtained from it.

  • Monascus purpureus - produces large holes in Swiss cheese.

  • Saccharomyces cerevisiae - used for making wine and beer after distillation

  • Streptococuss-produces streptokinase which is used to remove clots.

  • Aspergillus niger - produces citric acid and butyric acid.

Which antibiotic has bactericidal effect?

  • Erythromycin

  • Penicillin

  • Both 1 and 2

  • None of these

Wine and beer are produced directly by fermentation whereas brandy and whisky require both fermentation and distillation. This is because

 

 

  • fermentation is inhibited at an alcohol level of 10-18%

  • distillation prolongs storage

  • distillation improves quality

  • distillation purifies the beverage

Select the incorrect match

  • Citric acid - Aspergillus niger

  • Streptokinase - Streptococcus

  • Butyric acid - Clostridium acetobutylicum

  • Cyclosporin-A - Monascus purpures

Which of the following antibiotics is not correctly matched with the source from which it is obtained ?

   

Antibiotic

Source

(1)

Penicillin

Penicillium chrysogenum

(2)

Bacitracin

Bacillus licheniformis

(3)

Griseofulvin 

Penicillium griseofulvum

(4)   

Streptomycin      

Bacillus griseus
  • 1
  • 2
  • 3
  • 4

The preparation and flowering of leaves of tea and tobacco is due to the activities of 

  • Bacillus subtilis

  • Bacillus megatherium

  • Streptococcus lactis

  • Acetobacter aceti

The antibiotics have no effect on viruses because

 

  • .   viruses show the metabolism of their own

  • .   viruses are too small in size for antibiotics to act upon them

  • .   viruses show no metabolism of their own

  • .    viruses produce a thick covering and encyst themselves as endospores

The domestic sewage in large cities

  • has a high BOD as it contains both aerobic and bacteria

  • is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment plants (STPs)

  • when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

  • has very high amounts of suspended solids and dissolved salts

Name the blank spaces A, B, C and D given in the following table:

Type of Microbe

Scientific Name

Commercial. Product

Bacterium

A

Lactic acid

Fungus

B

Cyclosporin A

C

Monascus purpureus

Statins

Fungus

Penicillium notatum

D

  • A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Fungus), D - Penicillin

  • A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Algae), D - Penicillin

  • A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Prokaryote), D - Penicillin

  • A - Lactobacillus, B - Trichoderma polysporum, C - Agaricus (Fungus), D - Penicillin

Name the blank spaces a, b, c and d given in the following table:

Type of Microbe

Scientific Name

Commercial Product

Bacterium

A

Clot enzyme

B

Aspergillus niger

Citric acid

Fungus

Trichoderma polysporum

C

Bacterium

D

Butyric add

  • A - Streptococcus, B - Fungus, C - Cyclosporin-A, D - Clostridium butylicum

  • A - Clostridium butylicum, B - Streptococcus, C - Fungus, D - Cyclosporin-A

  • A - Cyclosporin-A, B - Clostridium butylicum, C - Streptococcus, D - Fungus

  • A - Fungus, B - Cyclosporin-A, C - Clostridium butylicum, D - Streptococcus

Which of the following bacteria help in nitrogen fixation from atmosphere?

A. Azotobacter

B. Rhizobium

C. Azospirillum

D. Lactobacillus

  • A, C, D

  • A, B, C, D

  • B, C, D

  • A, B, C

Yeasts have been used for the commercial production of all except:

  • Wine

  • Whisky

  • Ethanol

  • Curd

Methanogens are found in:

A. Ethanol

B. Organic acids

C. Anaerobic sludge

D. Rumen of cattle

  • A, C, D

  • C, D

  • B, C, D

  • A, B

The technology of biogas production in India has been developed by the efforts of:

A. Khadi and Village Industries Commision (KVIC)

B. Indian Council of Agricultural Research (IARI)

C. Indian Agricultural Research Institute (IARI)

D. Indian Council of Medical Research (ICMR)

  • A, C, D

  • C, D

  • A, C

  • A, B

Which of the following cyanobacteria can fix atmospheric nitrogen?

A. Nostoc

B. Anabaena

C. Oscillatoria

D. Yeast

  • A, C, D

  • C, D

  • A, C

  • A, B, C

Which of the following food items is produced by fermentation by the microbes?

A. Idli

B. Dosa

C. Toddy

D. Cheese

  • A, B, C, D

  • C, D

  • A, C

  • A, B, C

0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Botany Quiz Questions and Answers