Tag: option b: biotechnology and bioinformatics

Questions Related to option b: biotechnology and bioinformatics

An enzyme that stimulates germination of Barley seeds is?

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

  1. Invertase

  2. $\alpha$-amylase

  3. Lipase

  4. Protease

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Correct Option: B
Explanation:

a-amylase, a starch digesting enzyme is used for stimulation of germination of Barley seeds.

Correct answer-B

Select the correct statement.

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

  1. Acetobacter aceti produces citric acid.

  2. Saccharomyces cerevisiae is used as clot buster.

  3. Penicillium notatum restricts the growth of Staphylococci

  4. Methanogens are found in aerobic conditions.

Show answer
Correct Option: A
Explanation:

A)Acetobacter aceti produces acetic acid.

B)Saccharomyces cerevisiae is used as a producer of ethanol.
C)Penicillium notalum restricts the growth of Staphylococci.
D)Methanogens are found in aerobic conditions.
So the correct option is 'Penicillium notalum restricts the growth of Staphylococci'

How many statements are wrong?
microbiology: organisms in industry option b: biotechnology and bioinformatics biology

  1. Colostrum is recommended for the new born, because it is rich in antigen.

  2. Chikungunya is caused by a gram negative bacterium,

  3. Tissue culture has proved useful in obtaining virus-free plants.

  4. Beer is manufactured by distillation of fermented grape juice.

Show answer
Correct Option: A,B,D
Explanation:

Answer is "Three". The correct form of incorrect statements are:
Colostrum is rich in antibodies especially IgA.
Chikungunya is caused alphavirus and not bacteria.
In the fermentation process, beer is obtained from barley while wine is obtained from grapes.

Match column I with column II and select the correct option from the given codes.

Sr.No List I Sr.No.   List II
A.  Pigments  1.  Concanavalin A
B. Terpenoides 2.   Monoterpenes, Diterpenes
C.  Alkaloids 3.   Morphine, codeine
D.  Lectins 4.   Carotenoids, anthocyanins
microbiology: organisms in industry option b: biotechnology and bioinformatics biology

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

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

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

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

Show answer
Correct Option: A
Explanation:

Primary metabolites are the substances like amino acids on proteins structure that are used in the day to day function of the cell. Other than that plant and fungi have different molecules like alkaloid and different pigments and these are considered as secondary metabolites.


Pigments-Carotenoids, Anthocyanins,
Alkaloids- Morphine, Codeine, etc.
Terpenoides-Monoterpenes, Diterpenes etc.
Essential oils-Lemon grass oil, etc.
Toxins-Abrin, Ricin
Lectins-Concanavalin A
Drugs-Vinblastin, curcumin, etc.
Polymer-Rubber, gums, cellulose


So, the corect option is 'A-(iv);B-(ii);C-(iii);D-(i)'

To prevent the misuse of the important commercial solvent (Ethyl alcohol), it is mixed with ____

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

  1. Methanol

  2. Propanol

  3. Ethanoic acid

  4. Propane

Show answer
Correct Option: A
Explanation:

Ethyl alcohol is a very important solvent which is used in industries for preparation of paints, lacquers, dyes, varnishes, cosmetics, and perfumes etc. it is also used for drinking purpose in the form of beer, whiskey, rum, and gin. So, to avoid the misuse of ethyl alcohol meant for industrial processes, it is made unfit for drinking purpose by adding a small amount of CuSO4, methanol, and pyridine in it. This process is known as denaturation of alcohol and the alcohol thus obtained is called denatured alcohol.


So, the correct answer is 'Methanol'.

In the process of making bread, the carbohydrates in the flour are fermented by baker's yeast. Which of the following is another product when sugar is transformed into carbon dioxide?

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

  1. Methanol

  2. Ethanol

  3. Propanol

  4. Butanol

Show answer
Correct Option: B
Explanation:
Yeast converts sugar present in flour into carbon dioxide and ethyl alcohol. CO2 gas is trapped by gluten proteins in the flour which causes the dough to rise. Fermentation results in a light and airy crumb in bread products.

So, the correct answer is 'Ethanol'.

In process of fermentation of production of wine from grapes which microorganism is used?

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

  1. Saccharomyces cerevisiae

  2. Aspergillus oryzae

  3. Lactobacillus brevis

  4. Aspergillus niger

Show answer
Correct Option: A
Explanation:

The role of yeast in winemaking is the most important element that distinguishes wine from grape juice. In the absence of oxygen, yeast converts the sugars of wine grapes into alcohol and carbon dioxide through the process of fermentation. The most common yeast associated with winemaking is Saccharomyces cerevisiae which has been favored due to its predictable and vigorous fermentation capabilities, tolerance of relatively high levels of alcohol and sulfur dioxide as well as its ability to thrive in normal wine pH between 2.8 and 4.


So, the correct answer is 'Saccharomyces cerevisiae'.

Which one of the following alcoholic drink is produced without distillation?

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

  1. Wine

  2. Whisky

  3. Rum

  4. Brandy

Show answer
Correct Option: A
Explanation:
Wine is an undistilled product of fruit juice fermentation brought about by yeast. Wine is produced by the normal alcoholic fermentation of fruit juices, especially the grape juice.
Whiskey is a type of distilled alcoholic beverage, generally made from fermented grain mash including barley, corn, rye, and wheat.
One of the most loved alcoholic drink, rum is actually made by using the byproducts of sugarcane or sugarcane juice directly and is then distilled.
Brandy is the distillation product of fermented grape juice (wine) and contains about 40-50% alcohol. 
So the correct answer is option A "wine"

The functional group in ethanoic acid is ___________.

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

  1. alcohol

  2. aldehyde

  3. ketone

  4. carboxylic

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Correct Option: A

Acetic acid is _________.

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

  1. yellowish

  2. colourless

  3. white

  4. pink

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Correct Option: A