Science MCQ Test 1


30 Questions MCQ Test RAS RPSC Prelims Preparation - Notes, Study Material & Tests | Science MCQ Test 1


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This mock test of Science MCQ Test 1 for UPSC helps you for every UPSC entrance exam. This contains 30 Multiple Choice Questions for UPSC Science MCQ Test 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Science MCQ Test 1 quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Science MCQ Test 1 exercise for a better result in the exam. You can find other Science MCQ Test 1 extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

Bacillus thuringiensis is used as :

Solution:

Biological insecticide

Explanation: Bacillus thuringiensis (or Bt) is a Gram-positive, soil-dwelling bacterium, commonly used as a biological insecticide.

QUESTION: 2

Which among the following gas is most responsible for global warming ?

Solution: Co2 traps heat and global warming means heating of earth. So, Co2 is responsible for global warming.
QUESTION: 3

Which one of the following pairs is not correctly matched ?

Solution:
QUESTION: 4

Which Uranium isotope is used in nuclear power plants to produce electricity ?

Solution:
Nuclear Power is produced when a nucleus absorbs a neutron and splits into two lighter nuclei. This releases enormous amounts of energy which in turn produces heat. In fact the Uranium, which is the most common element used to produce nuclear power today, has an energy content about 3 million times greater than that of fossil fuel. 


Current Nuclear Power plants require the the use of the rare Uranium isotope U-235 and consequently only use one fiftith of the total energy content.
QUESTION: 5

The main constituent of biogas is :

Solution:

Methane

Explanation: The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.

QUESTION: 6

Filament of electric bulb is made of :

Solution:
QUESTION: 7

Which of the following radiations has the highest energy per quantum?

Solution:
QUESTION: 8

India’s first dedicated navigation satellite IRNSS – 1A was launched from :

Solution:

Sriharikota

Explanation: Launch date: July 1, 2013Launch mass: 1,380 kgLaunch site: Satish Dhawan Space CentreOperator: Indian Space Research OrganisationManufacturers: Indian Space Research Organisation Satellite Centre, Space Applications Centre

QUESTION: 9

Which one of the following pairs is not correctly matched ?

Solution:
QUESTION: 10

Indian Institute of Remote Sensing (IIRS) is situated at :

Solution:
QUESTION: 11

Mitochondria are not present in :­

Solution:
QUESTION: 12

The group of proteins responsible for cell lysis are :­

Solution:

Cytokines

Explanation: Cell lysis is the first step in cell fractionation, organelle isolation and protein extraction and purification.

QUESTION: 13

The Polymerase Chain Reaction (PCR) is used to :­

Solution:

All of the above

Explanation: PCR (Polymerase Chain Reaction)is a revolutionary method developed by Kary Mullis in the 1980s. PCR is based on using the ability of DNA polymerase to synthesize new strand of DNA complementary to the offered template strand.

QUESTION: 14

The ozone layer thickness is measured in :­

Solution:
QUESTION: 15

Which of the following hormone is called as emergency hormone?

Solution:

Adrenaline

Explanation: Adrenalin is called an emergency hormone because your body quickly produces and releases this when you are in an emergency situation

QUESTION: 16

Which of the following is a secondary air pollutant :­

Solution:
QUESTION: 17

Which among the following proteins is found in milk :­

Solution:
QUESTION: 18

The antibiotics kanamycin, tobramicin, streptomycin and gentamicin all belong to :­

Solution:
QUESTION: 19

Quinine is obtained from the bark of :­

Solution:

Cinchona Calisaya

Explanation: Quinine is obtained from the bark of the Cinchona tree that is found in the Andes mountain range of Peru and Ecuador. The Peruvian Indians used an infusion of Cinchona bark to treat fever and consequently it was discovered to be an effective treatment and preventative for malaria.

QUESTION: 20

The brown leaf spot of rice is caused by :­

Solution:

Fungus

Explanation: Brown spot is a fungal disease that infects the coleoptile, leaves, leaf sheath, panicle branches, glumes, and spikelets. Its most observable damage are the numerous big spots on the leaves which can kill the whole leaf. When infection occurs in the seed, unfilled grains or spotted or discolored seeds are formed.

QUESTION: 21

The most abundant renewable bio resource present on earth is :­

Solution:

Cellulose

Explanation: Cellulose is the most abundant biomass on Earth .It is the primary product of photosynthesis in terrestrial environments and the most abundant renewable bioresource produced in the biosphere

QUESTION: 22

A medicinal substance given against the intake of poison is known as

Solution:
QUESTION: 23

What is ‘Green Bonus’ ?

Solution:

Compensatory return for the environmental services rendered by the state

Explanation: Green Bonus is a new term in the environmental parlance denoting the money which is to be given for the effort made by a country, state or community for preservation of green cover. It is a compensation to be given to the people for the sacrifices they have made in preserving the green cover, which not only benefits them, but also benefits others nearby and humanity as a whole.

QUESTION: 24

The ozone layer mostly absorbs:

Solution:

Ultraviolet radiation

Explanation: Ozone and oxygen molecules in the stratosphere absorb ultraviolet light from the sun, providing a shield that prevents this radiation from passing to the earth's surface. While both oxygen and ozone together absorb 95 to 99.9% of the sun's ultraviolet radiation, only ozone effectively absorbs the most energetic ultraviolet light, known as UV-C and UV-B, which causes biological damage.

QUESTION: 25

Electric bulb filament is made of

Solution:
QUESTION: 26

The photosynthetic symbiont of a lichen is often:­

Solution:

 Green alga

Explanation: Lichens have been described as "dual organisms" because they are symbiotic associations between two (or sometimes more) entirely different types of microorganism -a fungus (termed the mycobiont)a green alga or a cyanobacterium (termed the photobiont).

QUESTION: 27

Which of the following sets of chemical elements constitutes more than 92 percent of living beings?

Solution:

Carbon, Oxygen, Hydrogen, Nitrogen

Explanation: Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. 

QUESTION: 28

Which one of the following pairs of plant tissues are found both in xylem and phloem?

Solution:
QUESTION: 29

Which of the following in not affected by HIV

Solution: A cytotoxic T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways.
QUESTION: 30

Which of the following diseases/disorders is caused by the death of dopamine secreting brain Neuron?

Solution:

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