Science & Technology mcqs#3
Q 1.Which of the following statements is / are correct?
1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.
Select the correct answer using the codes given below.
a.1 only
b.2 and 3 only
c.1 and 3 only
d.1, 2 and 3
Ans -b
Q 2.The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. with reference to them, which one of the following statements is not correct?
a.Gravity is the strongest of the four
b.Electromagnetism act only on particles with an electric charge
c.Weak nuclear force causes radioactivity
d.Strong nuclear force holds protons and neutrons inside the nuclear of an atom.
Ans -a
Q 3.The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is /are the importance/importances of discovering this particle?
1. It will enable us to understand why elementary particles have mass.
technology to transferring matter from one point to another without traversing the physical space between them.
3. It will enable us to create better fuels for nuclear fission.
Select the correct answer using the codes given below:
a.1 only
b.2 and 3 only
c.1 and 3 only
d,1, 2 and 3
Ans -a
Q 4.Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to
1. resist drought and increase absorptive area
2. tolerate extremes of PH
3. Resist disease infestation
Select the correct answer using the codes given below:
a.1 only
b.2 and 3 only
c.1 and 3 only
d.1, 2 and 3
Ans -d
Q 5.With reference to technologies for solar power production, consider the following statements:
1.’Photovoltaics’ is a technology that generates electricity by direct conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilizes the Sun’s rays to generate heat which is further used in electricity generation process.
2. Photovoltaics generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC).
3. India has manufacturing base for Solar Thermal technology, but not for Photovoltaics.
Which of the statements given above is / are correct?
a.1 only
b.2 and 3 only
c.1, 2 and 3
d.None
Ans -a
Q 6.Recombinant DNA technology (Genetic Engineering) allows genes to be transferred
1. across different species of plants
2. from animals to plants
3. from microorganisms to higher organisms
Select the correct answer using the codes given below.
a.1 only
b.2 and 3 only
c.1 and 3 only
d.1, 2 and 3
Ans -d
Q 7.Consider the following:
1. Electromagnetic radiation
2. Geothermal energy
3. Gravitational force
4. Plate movements
5. Rotation of the earth
6. Revolution of the earth
Which of the above are responsible for bringing dynamic changes on the surface of the earth?
a.1, 2, 3 and 4 only
b.1, 3, 5 and 6 only
c.2, 4, 5 and 6 only
d.1, 2, 3, 4, 5 and 6
Ans -d
Q 8.Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by
a.bacteria
b.protozoa
c.,moulds
d.viruses
Ans -c
Q 9.Which of the following diseases can be transmitted from one person to another through tattooing?
1. Chikungunya
2. Hepatitis B
3. HIV-AIDS
Select the correct answer using the codes given below.
a.1 only
b.2 and 3 only
c.1 and 3 only
d.1, 2 and 3
Ans -b
Q 10.Consider the following minerals
1. Calcium
2. Iron
3. Sodium
Which of the minerals given above is/are required by human body for the contraction of muscles?
a.1 only
b.2 and 3 only
c.1 and 3 only
d.1, 2 and 3
Ans -d
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