Tag: biology

Questions Related to biology

Atomic bomb was used during world war II in the year

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. 1939

  2. 1945

  3. 1941

  4. 1943

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Correct Option: B

Assertion: X and Y rays are emitted by disintegration of atomic nuclei of radioactive elements Reason: Nuclear fall out is shown by radioactive elements

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

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Correct Option: B

A non-ecofriendly source of energy is

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. Tidal energy

  2. Wind energy

  3. Solar energy

  4. Nuclear energy

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Correct Option: D
Explanation:

Tidal energy, wind energy and solar energy are non-polluting sources of energy. They do not harm the environment. Nuclear energy is obtained by fission reaction carried out in nuclear reactors. Dumping of radioactive wastes generated during energy production using nuclear reaction causes serious environmental hazards making it non-ecofriendly. Thus the correct answer is option D.

The first disaster of nuclear reactor occurred at

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. Trombay

  2. Narora

  3. Chemobyl

  4. TMI-2

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Correct Option: D

Chernobyl tragedy occurred in

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. 26th May, 1966

  2. 26th April, 1986

  3. 6th August, 1947

  4. 9th May, 1945

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Correct Option: B
Explanation:

Chernobyl is located in Ukraine. In April 1986, power reactor in Chernobyl burst due to over heating causing leakage of radioactive substances and radiations.

Problem associated with nuclear power plant is 

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. Thermal pollution

  2. Emission of hazardous radio-nuclides

  3. Disposal of radioactive waste

  4. All of the above

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Correct Option: D
Explanation:

Some thermal power stations exchange 60 to 70% of their thermal energy by cycling with a body of water or by evaporating water through a cooling tower. 

This thermal efficiency creates more waste heat. Most commercial nuclear power plants release gaseous and liquid radiological effluents into the environment as a byproduct. 
The nuclear fission of uranium-235 produces large quantities of intermediate mass radioisotopes. The mass distribution of these radioisotopes peaks at about mass numbers 95 and 137 , and most of them are radioactive. The most dangerous for environmental release are cesium and strontium because of their intermediate half-lives and entry in the food chain.

The term "Nuclear winter" is associated with

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. Nuclear War

  2. Nuclear disarmament

  3. Nuclear weapon testing

  4. After effect of a nuclear explosion

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Correct Option: D

Which of the following is the correct sequence of disposal of high-level radioactive wastes?
1. They are kept in thick leak proof containers
2. The wastes are concentrated to reduce their bulk
3. They are stored in special protective shields during handling and transport
4. The wastes are then buried deep down in the earth or undersea bed

biology towards green energy solar power plant generation of electricity production of electricity from solar energy

  1. 2-1-3-4

  2. 3-2-1-4

  3. 3-1-2-4

  4. 2-3-1-4

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Correct Option: B
Explanation:

Before disposal of high level of radioactive waste which is very harmful for living organism, there is procedure to dispose it. 

Radioactive waste is stored in special protective shield before handling and transport. After that it is reduce to minimum amount and kept in leak proof containers before depose it, so that it cant harm environment around. Waste should be dispose into deep down earth or under sea bed for misuse.
So, the correct option is '3-2-1-4'.

Identify the incorrect pair ____________.

biology food and it's constituents energy giving food carbohydrate and its test biological molecules

  1. Glucose; polysaccharide

  2. Starch; polysaccharide

  3. Starch; carbohydrate

  4. Glucose; carbohydrate

  5. Glucose; monosaccharide

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Correct Option: A

Carbohydrates are produced by

biology food and it's constituents energy giving food carbohydrate and its test biological molecules

  1. Some bacteria, algae and green plant cells

  2. Fungi, algae and green plant cells

  3. All bacteria, fungi and algae

  4. Viruses, fungi and bacteria

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Correct Option: A
Explanation:

Carbohydrates are the most abundant biomolecules found on the face of the earth. This is so because every year plants and algae through the process of photosynthesis convert more than 100 billion metric tons of carbon dioxide and water to cellulose and other products for use by the plants. Some bacteria undergo photosynthesis but it is anoxygenic as bacteria has only pigment system I. Thus, the correct answer is option A.