Tag: economic importance of bacteria and fungi

Questions Related to economic importance of bacteria and fungi

Choose the correct answers from the alternatives given.
A sexual spore produced by a sac fungus is called

biology economic importance of bacteria and fungi common diseases in humans epidemics transmission of diseases

  1. mycelium

  2. conidium

  3. ascospore

  4. basidiospore

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Correct Option: C
Explanation:

Ascomycota members include molds that have septate hyphae and some yeasts which are called sac fungi because their sexual spores, called ascospores, are produced in a sac or ascus.

So, the correct option is 'ascospore'.

The thread like structures that developed on the bread are the hyphae of the mushroom. 

biology economic importance of bacteria and fungi common diseases in humans epidemics transmission of diseases

  1. True

  2. False

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Correct Option: B
Explanation:
  • The hyphae that develop on the bread are of the fungus Rhizopus stolonifer also known as black bread mold and it is not a type of mushroom.

Ray fungi as diazotrophs are

biology economic importance of bacteria and fungi common diseases in humans epidemics transmission of diseases

  1. Streptomyces and Mycoplasma

  2. Gram negative monerans and symbiotically associated with Xanthomonas

  3. Gram positive monerans and symbiotically associated with Alnus

  4. Chemoautotrophic $ { N } _{ 2} $ - fixer

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Correct Option: C
Explanation:

Actinomyces species of bacteria form colonies that have fungus like branched networks of hyphae and are therefore also known as ray fungus. They are gram positive and a few species of nitrogen fixing bacteria live in symbiosis with actinorhizal plants of the genus Alnus. 

So, the correct option is 'Gram-positive monerans and symbiotically associated with Alnus'.

Choose the correct answers from the alternatives given.
Which of the following purposes do you think is served, by $CO _2$ as an end product of fermentation in baking industry?

biology economic importance of bacteria and fungi common diseases in humans epidemics transmission of diseases

  1. To lighten the dough

  2. To give colour to bread

  3. To give flavour to the bread

  4. To produce beautiful shape

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Correct Option: A
Explanation:

The sugars in the bread product are converted into carbon dioxide and ethanol as an end product. The carbon dioxide is evolved from the dough when the yeast gets dissolved in water so that it makes the dough lighter.

So, the correct option is 'To lighten the dough'.