Tag: biology

Questions Related to biology

Which bacteria is used as biopesticide first on the commercial scale in the world?

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. Bacillus thuringiensis

  2. E' colt

  3. Pseudomonas aeruginosa

  4. Agrobacterium tumefaciens

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Correct Option: B

Match column I with column II and select the correct below. 

Column I Column II
A. Stains (i) Biogas
B. Dung  (ii) Saccharomyces cerevisae
C. Ethanol production (iii) Monascus purpureus
D. Cyclosporin A (iv) Trichoderma polysporum 
microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. A-(iii), B-(i), C-(iv), D-(ii)

  2. A-(i), B-(iii), C-(iv), D-(ii)

  3. A-(iii), B-(ii), C-(iv), D-(i)

  4. A-(iii), B-(i), C-(ii), D-(iv)

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Correct Option: D
Explanation:
Strains are produced by Monascus purpureus. Dung is used to produce Biogas. Saccharomyces cerevisae is used in the production of ethanol.  Cyclosporin A is obtained from Tricoderma polysporum.
So, the correct option is 'A-(iii), B-(I), C-(ii), D-(iv)'

Which, one of the following alcoholic drinks is produced without distillation ?

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. Wine

  2. Whisky

  3. Rum

  4. Brandy

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Correct Option: A
Explanation:

Wine is the alcoholic drink produced without distillation whereas whisky, rum and brandy are produced by the distillation of the fermented broth. The alcoholic drinks are formed either by distillation or without distillation depending on the type of raw material used for fermentation. 

So, the correct option is 'Option A' .

Formation of vinegar from alcohol is caused by

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. Bacillus subtilis

  2. Clostridium

  3. Acetobacter aceti

  4. Azotobacter

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Correct Option: C

Give the correct ascending order of alcohol content in the following.


(a) Brandy
(b) Gin

(c) Wine
(d) Beer

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. $a \rightarrow b \rightarrow d \rightarrow c$

  2. $b \rightarrow c \rightarrow d \rightarrow a$

  3. $d \rightarrow c \rightarrow a \rightarrow b$

  4. $d \rightarrow c \rightarrow b \rightarrow a$

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Correct Option: C
Explanation:

a) Brandy has an alcohol content of 40%.

b) Gin has an alcohol content of 40-47%.
c) Wine has an alcohol content of 11.6%.
d) Beer has an alcohol content of 4-6%.
So, the correct answer is d→c→a→b

Alcoholic dehydrogenase gets activated by?

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. $Mg^{++}$

  2. Mo

  3. $Zn^{++}$

  4. K

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Correct Option: A
Explanation:

Alcoholic dehydrogenase is an enzyme required during the anaerobic respiration to convert the aldehyde to the ethanol. Its activity is enhanced by the presence of Mg$^{++}$ ions that allow the NADPH to combine for oxidation to NADP.

Hence, the correct answer is 'Mg$^{++}$'.

Bitterness of cucurbits is due to

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. The acid present in them

  2. Presence of bitter seed in them

  3. The alkalinity in their pulp

  4. The occurrence of triterpenoids

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Correct Option: D
Explanation:

Cucurbitacins is a triterpenoid that occurs commonly in Cucurbitaceae family and gives a bitter flavour. It acts as an anticancer agents, insecticides and beetle attractants. The concentration of cucurbitacins is generally highest in roots and fruit. 

Thus, the correct answer is option D.

Pyrethrin is extracted from Chrysanthemum cinerarifolium

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. True

  2. False

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Correct Option: A
Explanation:
Pyrethrum is the crude extract obtained from Chrysanthemum. Pyrethrin refers to a more refined extract of Pyrethrum.
So, the correct option is 'True'

Production of ethanol $(C _2H _5OH)$ occurs in one of the life processes of

microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. Bread mould

  2. Yeast

  3. Mushroom

  4. Penicillium

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Correct Option: B
Explanation:

Ethanol is produced during Anaerobic respiration by yeast, the process commonly known as Fermentation.

Glucose $ \rightarrow\ $ethanol + Carbon dioxide + energy
It is utilised in the breweries and bakeries.
Hence, the correct answer is 'Yeast'.

Monoclonal antibodies can be used

biology diseases and immunity antibodies antibodies and antitoxin antigen and antibody

  1. diagnosis, screening and therapy

  2. in vaccine production

  3. as enzyme and called enzymes

  4. in purification and quantification of other molecules

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Correct Option: A,B,C,D