Tag: biology

Questions Related to biology

Which of the following is an edible mushroom?

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

  1. Agaricus bisporus

  2. Amanita phalloides

  3. Jack O Lantern

  4. Entoloma

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Correct Option: A
Explanation:
  1. Agaricus bisporus from the above options is an edible mushroom which is a native of grassland of Europe and North America.
  2. Rest of the mushrooms Amanita phalloides (Death cap), Omphalous olearius (Jack O Lantern) and fungus of genus Entoloma are all poisonous and not eligible for human consumption as they me cause sever cramps and vomiting and other symptoms.

In mushroom, fungal tissue which formed central part of a
gill is

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

  1. Strema

  2. Trema

  3. Sub-hyminium

  4. Hyminium

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Correct Option: B
Explanation:

Mature gill composed of a central core called trema which is made up of parallel or loosely interwoven hyphae.

In mushroom cultivation, spawn is 

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

  1. Compost

  2. Button stage

  3. Vegetative mycelium

  4. Harvested mushroom

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Correct Option: C
Explanation:

Mushroom Spawn is simply any substance that has been inoculated with mycelium, the vegetative growth of the fungus. Mycelium a thread like the collection of the cell is to a mushroom-like an apple tree is to an apple.

So, the correct option is 'Vegetative mycelium'.

Consider the following substances.
a. Cellulose
b. Glucan
c. Lignin
Which of the statements is/are found as a component/components of fungal cell wall?

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

  1. $1$ and $2$ only

  2. $2$ and $3$ only

  3. $3$ only

  4. $1, 2$ and $3$

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Correct Option: A

Which one of the following is used as fungal insecticide in Bio-control programs?

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

  1. Trichoderma viridi

  2. Phytophthora parasitica

  3. Beauveria bassiana

  4. Aspergillus niger

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Correct Option: A

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

Show answer
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'.

The ultimate energy source of all ecosystems is?

biology living in harmony climate factors abiotic components organisms and environment

  1. Producers

  2. Organic molecules

  3. Carbohydrate

  4. Solar radiation

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Correct Option: D
Explanation:

 The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs. The continual input of energy, mostly from sunlight, sustains the process of life. Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere. The overall productivity of an ecosystem is controlled by the total energy available.

So the correct option is 'solar radiation'.