Tag: micro - organisms: a wonderful world

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Questions Related to micro - organisms: a wonderful world

Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

The germ theory of diseases was established by

  1. Louis Pasteur

  2. Robert Koch

  3. Lister

  4. Alexander Fleming
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Louis Pasteur proposed the germ theory of disease. This theory explains that the disease is caused by the microorganisms which cannot be seen by naked eyes. These are small and microscopic organisms. These organisms are dependent on the host for activities like growth. He demonstrated that fermentation is the result of the action of microorganism on sugar. 

Thus, the correct answer is 'Louis Pasteur'.

Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

The fermenting agent of dosa and idli is

  1. Saccharomyces cerevisiae

  2. Leuconostoc mesenteroides

  3. Streptococcus faecalis

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The fermentation of Idli and Dosa batter is a complex process involving multiple lactic acid bacteria, including Leuconostoc mesenteroides and Streptococcus faecalis.

Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

Which one is not used in the production of Yoghurt?

  1. Streptococcus lactis

  2. Streptococcus thermophilus

  3. Lactobacillus bulgaricus

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

Yoghurt are produced from cultures of Lactobacillus and Streptococcus.Acetobacter aceti has no role in production of yoghurt.

Correct answer-D

Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

Which group is responsible for formation and flavour of yogurt?

  1. Bacillus megathermus and Xanthomonas sp.

  2. Bacillus subtilis and E.coli

  3. Rhizobium meliloti and Azotobacter

  4. Lactobacillus casei and Streptococcus thermophilus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lactobacillus and Streptococcus that are capable of lactic acid fermentation are used in the flavouring of yogurt.

Correct answer-D

Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

Large holes in Swiss cheese are formed due to production of a large amount of ${CO} _{2}$ by

  1. Propionebacterium

  2. Mycobacterium

  3. Saccharomyces

  4. Penicillium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Propionibacterium Sharmani or P.Sharmani is the bacterium used for the production of a large amount of CO2 for making large holes in cheese.

so, the correct option is 'Propionibacterium'.

Multiple choice biology micro - organisms: a wonderful world diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

How does Paramecium look under compound microscope?

  1. Oval

  2. Irregular

  3. Circular

  4. Long thread like
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Paramecium is a unicellular ciliated protozoan. It looks an oval, slipper-shaped micro-organism when observed under a microscope, rounded at the front/top and pointed at the back/bottom. It can also be seen by naked eyes.

Multiple choice biology micro - organisms: a wonderful world diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

A Paramoecium reproduces by 

  1. Budding

  2. Laying eggs

  3. Preparing spores

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

In Paramoecium, reproduction takes place by binary fission method. At first, micronucleus divides into 2 nuclei by mitosis. The cytopharynx also divides into 2 parts. The cytoplasm is also divided into 2 parts. Then transverse constriction is made from two sides. New contractile vacuoles are formed. The constriction meet at centre and two daughter paramecia reproduced. Thus, the correct answer is option D.

Multiple choice biology micro - organisms: a wonderful world diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

The microorganism known as pond scum is autotrophic due to the presence of 

  1. Carotene

  2. Chlorophyll

  3. Melanin

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pond scum is a massive growth of algae on the surface of the pond or any stagnant water source. They are autotrophic in nature due to the green compound present which helps in photosynthesis, these pigments are called chlorophyll.

So, the correct option is 'Chlorophyll'.