Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                 Column II
(GM microbe)                           (Application)
I. Rhizobium meliloti                 1. Prevention of frost damage
II. Pseudomonas                       2. Nitrogen fixation in fluorescence cereals
III. Pseudomonas putida            3. Scavenging of oil spills
IV. Trichoderma                         4. Biocontrol of fungal diseases
Codes:
      I   II   III   IV
  • D.   1   2   4      3

  • C.   2   1   3      4
  • A.   1   2    3     4
  • B.   2   1   4      3

In the given diagram the gas X can be:
  • Hydrogen sulfide
  • Carbon monoxide
  • Ammonia
  • Oxygen

The virus shown here is a causative agent of:
  • Intestinal infections
  • Respiratory infections
  • CNS infections
  • Genito-urinary infections

Which one of the following impurities is easiest to remove from wastewater? (NCERT Exemplar)
  • Bacteria
  • Colloids
  • Dissolved solids
  • Suspended solids

Match the following list of bioactive substances and their roles:
Bioactive Substances: -
(i) Statins (ii) Cyclosporin A (iii) Streptokinase (iv) Lipase

Role-
A. Removal of oil stains
B. Removal of clots from blood vessels
C. Lowering of blood cholesterol
D. Immuno-suppressive agent

Choose the correct match:

  • i B, ii C, iii A, iv D

  • i D, ii B, iii A, iv C

  • i B, ii A, iii D, iv C

  • i C, ii D, iii B, iv A

A genetically engineered micro- organism used successfully in bioremediation of oil spills is a species of:

  • Pseudomonas

  • Trichoderma

  • Xanthomonas

  • Bacillus

Which one of the following pairs is wrongly matched?

  • Methanogens - Gobar gas

  • Yeast - Ethanol

  • Streptomycetes - Antibiotic

  • Coliforms - Vinegar

Match the items in Column ‘A’ and Column ‘B’ and choose correct answer:   

Column A

Column B

(i) Lady bird

(A) Methanobacterium

(ii) Mycorrhiza

(B) Trichoderma

(iii) Biological control

(C) Aphids

(iv) Biogas

(D) Glomus

           

The correct answer is:

  • i B, ii D, iii C, iv A     

  • i C, ii D, iii B, iv A

  • i D, ii A, iii B, iv C         

  • i C, ii D, iii A, iv A

Mycorrhiza does not help the host plant in:

  • Enhancing its phosphorus uptake capacity

  • Increasing its tolerance to drought

  • Enhancing its resistance to root pathogens

  • Increasing its resistance to insects

Biological Pest Control methods are more preferably used because-

  • Chemical pesticides are discriminate

  • Predators work through check and balance

  • Predators are indiscriminate

  • All of above

Which of the following statement is incorrect?

  • Trichoderma is free living fungi, present in root ecosystem acts as biocontrol agent

  • Genus of baculoviruses is species group specific broad spectrum insecticide

  • All harmful insect pests should be kept at manageable level as it furthers biodiversity

  • Ladybird and Dragonflies are used as biocontrol agent

Read the following four statements (I – IV), find out certain mistakes in two of them.
I: In our stomach lactic acid bacteria play beneficial role by checking growth of disease causing microbes.
II: Lactic acid bacteria produce acid that coagulates and completely digests the milk protein.
III: Lactic acid bacteria improve the nutritional quality by increasing the amount of Riboflavin
IV: Lactic acid bacteria require suitable temperature for their multiplication.
Which of the above two statements are not correct?

  • Statements I and II

  • Statement I and III

  • Statement II and III

  • Statements II and IV

Select the mis-match:

  • Monascus purpureus - Statins

  • Trichoderma polysporum - Cyclosporin-A

  • Clostridium butylicum - Citric acid

  • Streptococci - Streptokinase

Nucleopolyhedrovirus are:

  • Broad-spectrum insecticides

  • Effective against several plant pathogens

  • Harmful to non-target insects

  • Used as biological control agents

The distillation of the fermented broth is required in the formation of

A. rum               

B. beer

C. brandy           

D. whisky

  • A, B, C

  • A, C, D

  • B, C, D

  • A, B, D

Microbe used for biocontrol of pest butterfly caterpillars is

  • Bacillus thuringiensis.

  • Streptococcus species

  • Trichoderma species

  • Saccharomyces cerevisiae

A biofertilizer is

  • Cyanobacterium Anabaena in cavities of Azolla leaves.

  • Symbiotic association of Azotobacter for fixing atmospheric nitrogen.

  • Farmyard manure.

  • Green manure

Flocs is

treatment.

  • Primary sludge produced in sewage treatment.

  • A type of biofortified food.

  • A mesh like structure formed by association of bacteria and fungal filaments in sewage

  • The effluent in primary treatment tank obtained during sewage treatment

Identify the set which has all organisms used in biological control of pests

  • Trichoderma, Nucleopolyhedro virus, Bacillus thuringiensis, Lady Bird (Lady Bug) beetle.

  • Dragon flies, Bacillus thuringiensis, Lady Bird, Aphids.

  • Lady Bird, Penicillium, Baculovirus, Aspergillus.

  • Trichoderma, Aspergillus, Bacillus thuringiensis, Nucleopolyhedro virus.

Ernest Chain and Howard Florey’s contribution was

  • Discovery of streptokinase.

  • Establishment of potential of penicillin as effective drug.

  • Discovery of DNA sequences.

  • Isolating the bacterial plasmid.

Conversion of milk to curd improves its nutritional value by increasing the amount of

 

  • Vitamin D

  • Vitamin A

  • Vitamin B12 

  • Vitamin E

Which of the following alcoholic drinks are produced by distillation of the fermented broth:

  • Beer and wine

  • Whisky, brandy, rum

  • Beer and rum

  • Wine and brandy

A major component of gobar gas is :

  • Butane

  • Ammonia

  • Methane

  • Ethane

Which of the following is not used as a biofertilizers :

  • Rhizobium

  • Fungi-Glomus

  • Cyano bacteria

  • Yeast

Which of the following is one of the most significant discoveries of the twentieth century that greatly contributed towards the welfare of human society?

  • Biogas

  • Curd

  • Penicillin

  • Citric acid

Assertion : Dragonflies are useful to get rid of mosquitoes

Reason : Baculoviruses are pathogens that attack insects and other arthropods.
  • If both the ssertion and the reason are true and the reason is a correct explanation of the assertion
  • If oth the assertion and reason are true but the reason is not a correct explanation of the assertion
  • If the assertion is true but the reason is false
  • If both the assertion an reason are false

Blood-cholesterol lowering agent is and produced by

  •   Statins, Monascus purpureus

  •   Statins, Trichoderma polysporum

  •   Cyclosporin A, Streptococcus

  •   Streptokinase, Streptococcus

During secondary treatment, major part of activated sludge is pumped into tanks called

  •   Aerobic sludge digesters.

  •   Anaerobic sludge digesters.

  •   Primary sludge digesters.

  •   Settling tanks.

To obtain microbial product at industrial scale which equipment is used.

  • Auto clave.

  • Fermentors.

  • Laminar flow.

  • Phytotron.

In STP

  • Primary treatment is a biological process.

  • Flocs are anaerobic and autotrophic microbes.

  • BOD measures the organic matter present in the water.

  • Activated sludge is the effluent of tertiary treatment.

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Practice Botany Quiz Questions and Answers