Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The assertion is true because radioactive decay involves the emission of alpha, beta, and gamma rays. The reason is also true as radioactive elements do cause fallout, but the fallout itself is a consequence of the decay, not the mechanism that explains why the rays are emitted.

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

A non-ecofriendly source of energy is

  1. Tidal energy

  2. Wind energy

  3. Solar energy

  4. Nuclear energy
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

The first disaster of nuclear reactor occurred at

  1. Trombay

  2. Narora

  3. Chemobyl

  4. TMI-2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The first major nuclear reactor disaster occurred at Three Mile Island Unit 2 (TMI-2) in Pennsylvania, USA in 1979. This was a partial meltdown. Chernobyl (1986) happened later, and 'Chemobyl' appears to be a misspelling.

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

Problem associated with nuclear power plant is 

  1. Thermal pollution

  2. Emission of hazardous radio-nuclides

  3. Disposal of radioactive waste

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

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

The term "Nuclear winter" is associated with

  1. Nuclear War

  2. Nuclear disarmament

  3. Nuclear weapon testing

  4. After effect of a nuclear explosion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nuclear winter is a hypothetical climatic effect where smoke and soot from massive nuclear explosions block sunlight, leading to a significant drop in global temperatures.

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

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

  1. 2-1-3-4

  2. 3-2-1-4

  3. 3-1-2-4

  4. 2-3-1-4
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Carbohydrates are produced by

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.