Tag: uses of microorganisms

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Multiple choice biology introduction to microbiology food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms commercial use of microorganism microbes in household and industry

During its formation, bread becomes porous due to CO$ _2$ released by

  1. Protozoans

  2. Bacteria

  3. Yeast

  4. Viruses
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bread is prepared from the dough, which is fermented using baker's yeast ( Saccharomyces cerevisiae ). The puffed-up appearance of dough is due to the production of carbon dioxide during fermentation. Carbon dioxide gas along with ethyl alcohol evaporate during baking, making bread porous and soft. 

So, n2
So, the correct answer is 'Yeast'

Multiple choice biology introduction to microbiology food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms commercial use of microorganism microbes in household and industry

Which one is used for preparation of bread?

  1. Lactobacillus

  2. Streptobacillus

  3. Aspergillus

  4. S.cerevisiae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saccharomyces cerevisiae, commonly known as baker's yeast, is the primary microorganism used in the bread-making process for leavening.

Multiple choice biology introduction to microbiology food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms commercial use of microorganism microbes in household and industry

Mostly bread is semi-sweet in taste due to.

  1. Yeast

  2. Remnants of alcohol

  3. Sugar

  4. Acetic acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the making of bread both carbon dioxide and alcohol are trapped by the dough and both are expelled from the dough by the heat of baking. So, the bread tastes semi-sweet.

So, the correct answer is 'Remnants of alcohol'.

Multiple choice biology introduction to microbiology food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms commercial use of microorganism microbes in household and industry

Elevated $CO _{2}$ level can be beneficial to some plants and harmful on others, included

  1. Rice

  2. Wheat

  3. Sugarcane

  4. Cotton
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

C3 plants, such as wheat, generally show a more significant increase in photosynthetic rate and growth in response to elevated CO2 levels compared to C4 plants like sugarcane or maize.

Multiple choice biology introduction to microbiology food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms commercial use of microorganism microbes in household and industry

Viruses are useful for making breads.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Yeast is used as a leavening agent in bread making. Yeast converts sugars present in the dough to carbon dioxide.
 Due to this, the dough expands. When such dough is baked then air pockets formed due to carbon dioxide will give soft and spongy texture to the bread. The virus is not used for making bread as it lacks respiration. 

Thus, the correct answer is option B.

Multiple choice biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

Technologies break down various plant materials (for example, cellulose, lignin and xylan from crops) and it results in a

  1. Non-biodegradeable

  2. Less toxic

  3. Biomass

  4. Biofuel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The productivity of plants as biofuel or biomaterial crops is established by both the yield of plant biomass per unit area of land and the efficiency of conversion of the biomass to biofuel. Genomics approaches support genetic selection strategies to deliver significant genetic improvement of plants as sources of biomass for biofuel manufacture. Genetic modification of plants provides a further range of options for improving the composition of biomass and for plant modifications to assist the fabrication of biofuels. The relative carbohydrate and lignin content influences the deconstruction of plant cell walls to biofuels. Key options for facilitating the deconstruction leading to higher monomeric sugar release from plants include increasing cellulose content, reducing cellulose crystallinity, and/or altering the amount or composition of noncellulosic polysaccharides or lignin. Modification of chemical linkages within and between these biomass components may improve the ease of deconstruction. Expression of enzymes in the plant may provide a cost-effective option for biochemical conversion to biofuel.

Therefore, the correct answer is option D.

Multiple choice biology micro organisms food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

Moulds belong to 

  1. Ascomycota

  2. Zygomycota

  3. Deutromycota

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(A)Ascomycota is a class commonly known as sac fungi with asexual spore ascus.

(B)Zygomycota is a class of fast-growing fungi with asexual spore conidia.
(C)Deutromycota is a class commonly called fungi Imperfecti where there is no sexual phase.
So, the correct answer is 'All of the above'.

Multiple choice biology micro organisms food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

Hyphomycetes is a group of

  1. Mushroom

  2. Yeast

  3. Mould

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mould is a fungus that grows on the bread when kept outside for long, molds feed on the carbohydrate present on the bread. Fungi have the saprophytic mode of nutrition. Fungi is further classified into fungi imperfecti called Hyphomycetes.

So, the correct option is 'Fungi'.