science Questions with solutions MCQs

1. Deficiency of Vitamin D causes

A

Rickets

B

Night Blindness

C

Scurvy

D

Beri-Beri

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

2. During the process of photosynthesis in a neem tree, the first step is

A

Absorption of light energy by chlorophyll

B

Reduction of carbon dioxide to Carbohydrates

C

splitting of water molecules in hydrogen and oxygen

D

Conversion of light energy to chemical energy

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

3. Which of the following organisms derives its nutrition directly from other organisms?

A

Leech

B

Aspergillus

C

Paramecium

D

None of these

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

4. Which isotope is used for the treatment of cancer

A

Radium

B

Cobalt

C

Iodine

D

Uranium

Science Laboratory Attendant 2021
Correct Answer : B
Explanation :

B

Correct Answered :

Wrong Answered :

5. Firewood has low heat content per kg of its mass. Which one of the following technologies can be used to convert firewood to a better source of energy?

A

Converting it into fossil fuel

B

Burning it in limited supply of oxygen

C

Converting it into bio gas

D

Converting it into ash

Science Laboratory Attendant 2021
Correct Answer : B
Explanation :

B

Correct Answered :

Wrong Answered :

6. Which one of the following is true for ozone?

A

Ozone is a deadly poison

B

Ozone is not harmful

C

Ozone is essential for all aerobic forms of life

D

Ozone is essential for the metabolic activities of plants

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

7. A particle moves on X-axis starting from x=1.0 If the particle moves 5.0 units in the positive direction and 3.0 units in the negative direction, then the displacement d is given by the expression

A

d=5.0+3.0

B

d=5.0-3.0

C

d=5.0+3.0-1.0

D

d=5.0-3.0-1.0

Science Laboratory Attendant 2021
Correct Answer : B
Explanation :

B

Correct Answered :

Wrong Answered :

8. Carbon and energy requirements of the autotrophic organism are fulfilled b

A

Transpiration

B

Digestion

C

Respiration

D

Photosynthesis

Science Laboratory Attendant 2021
Correct Answer : D
Explanation :

D

Correct Answered :

Wrong Answered :

9. Longitudinal waves with amplitude A=0.1 can be propagated through fluids and solids with volume 2.0 m because

A

Fluids and solids have bulk modulus

B

Fluids have shear modulus and solids have bulk modulus

C

They both possess shear modulus

D

Fluids have bulk modulus and solids have shear modulus

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

10. Biological magnification refers to

A

the increase in the concentration of toxin as we move to the top of food web

B

the micro and macro organisms that live in an ecosystem

C

The number of levels in the food web

D

the system of consumption of various foods

science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

11. The solar energy reaching unit area at outer edge of the earth`s atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and earth is known as

A

Thermal power

B

Solar constant

C

Voltaic coefficient

D

Energy coefficient

Science Laboratory Attendant 2021
Correct Answer : B
Explanation :

B

Correct Answered :

Wrong Answered :

12. As per the rules of operations on scalars which of the following statements isnot correct about vectors in the context of Physical quantities?

A

Any two arbitrary vectors can be multiplied

B

Any arbitrary vector can be multiplied by an arbitrary scalar

C

Any two arbitrary vectors can be added if they have the same units

D

None of these

Science Laboratory Attendant 2021
Correct Answer : C
Explanation :

C

Correct Answered :

Wrong Answered :

13. Which one of the following statements holds true for a human being?

A

About 12% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers

B

About 2% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers

C

About 10% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers

D

About 22% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers

Science Laboratory Attendant 2021
Correct Answer : C
Explanation :

C

Correct Answered :

Wrong Answered :

14. A coil with 25 turns and 2 cm length is passed in 1 second over a bar magnet`s north pole and pulled away in 0.5 sec through the same distance. What will you observe?

A

The current induced in the coil is highest when the coil is moved parallel to the magnetic field.

B

The current induced in the coil is highest when the coil is moved at an angle of 45 degrees to the magnetic field to the magnetic field.

C

The current induced in the coil is highest when the coil is moved perpendicular to the magnetic field.

D

The current induced in the coil is lowest when the coil is moved perpendicular to the magnetic field

Science Laboratory Attendant 2021
Correct Answer : C
Explanation :

The current induced in the coil is highest when the coil is moved perpendicular to the magnetic field.

Correct Answered :

Wrong Answered :

15. Sudden increase in temperature during the day is prevented by the

A

Atmosphere

B

Clouds

C

Rain

D

Acid Rain

Science Laboratory Attendant 2021
Correct Answer : A
Explanation :

A

Correct Answered :

Wrong Answered :

16. Which hormone regulates blood glucose levels by facilitating the uptake of glucose into cells? 

A

Glucagon

B

Insulin

C

Adrenaline

D

Cortisol

Science Supervisor 2024
Correct Answer : B
Explanation :

Insulin, together with its principal counter-regulatory hormone glucagon, regulates blood glucose concentrations. Pancreatic β cells secrete 0.25–1.5 units of insulin per hour during the fasting (or basal) state, sufficient to enable glucose insulin-dependent entry into cells.

Correct Answered :

Wrong Answered :

17. What is the main goal of health promotion?

A

Cure diseases

B

Prevent diseasea and enhance health

C

Develop new medications

D

Provide emergency care

Science Supervisor 2024
Correct Answer : B
Explanation :

Health promotion reduces premature deaths. By focusing on prevention, health promotion reduces the costs (both financial and human) that individuals, employers, families, insurance companies, medical facilities, communities, the state and the nation would spend on medical treatment.

Correct Answered :

Wrong Answered :

18. At what minimum internal temperature should poultry be cooked to ensure it is safe to eat?

A

145o F (63o C)

B

155o F (68o C)

C

165o F (74o C)

D

175o F (79o C)

Science Supervisor 2024 VERIFIED
Correct Answer : C
Explanation :

There are three important temperatures to remember when cooking meat or eggs at home: Eggs and all ground meats must be cooked to 160°F; poultry and fowl to 165°F; and fresh meat steaks, chops and roasts to 145°F. Use a thermometer to check temperatures.

Correct Answered :

Wrong Answered :

19. Which type of bacteria is most commonly associated with foodborne illness from undercooked or raw eggs?

A

E. Coli

B

Listeria

C

Salmonella

D

Staphylococcus

Science Supervisor 2024
Correct Answer : C
Explanation :

Foods involved in outbreaks of salmonellosis include eggs, poultry and other products of animal origin. Foodborne cases with Campylobacter are mainly caused by raw milk, raw or undercooked poultry and drinking water.

Correct Answered :

Wrong Answered :

20. What is cross-contamination?

A

Using the same cutting board for raw meat and vegetables without washing it

B

Storing cooked food in the refrigerator

C

Cooking food to the right temperature

D

Washing hand before handling food

Science Supervisor 2024
Correct Answer : A
Explanation :

Cross-contamination is the physical movement or transfer of harmful bacteria from one person, object or place to another.

Correct Answered :

Wrong Answered :

21. Which of the following is a common symptom of food poisoning?

A

Headache

B

Fever

C

Muscle pain

D

Nausea and vomiting

Science Supervisor 2024
Correct Answer : D
Explanation :

Symptoms of food poisoning often include upset stomach, diarrhea and vomiting. Symptoms usually start within hours or several days of eating the food. Most people have mild illness and get better without treatment

Correct Answered :

Wrong Answered :

22. What is the primary function of phosphorus in the human body?

A

Development of bones and teeth

B

Regulation of pH of body fluids

C

Regulation of muscle contraction

D

None of the above

Science Supervisor 2024
Correct Answer : A
Explanation :

Function. The main function of phosphorus is in the formation of bones and teeth. It plays an important role in how the body uses carbohydrates and fats. It is also needed for the body to make protein for the growth, maintenance, and repair of cells and tissues.

Correct Answered :

Wrong Answered :

23. Which of the following is a renewable source of energy that is used to power vehicles?

A

Coal

B

Oil

C

Propane

D

Ethanol

Science Supervisor 2024
Correct Answer : D
Explanation :

Ethanol is used to power vehicles as an alternate source of energy because ethanol in the presence of heat reacts with atmospheric oxygen to release energy and form carbon dioxide and water. This is a chemical reaction.

Correct Answered :

Wrong Answered :

24. Children with pot belly is an indicative of which type of disease

A

Goitre

B

Anaemia

C

Kwashiorkor

D

Chickenpox

Science Supervisor 2024
Correct Answer : C
Explanation :

Kwashiorkor is a type of malnutrition characterized by severe protein deficiency. It causes fluid retention and a swollen, distended abdomen. Kwashiorkor most commonly affects children, particularly in developing countries with high levels of poverty and food insecurity.

Correct Answered :

Wrong Answered :

25. The amount of air that moves in and out of the lungs, with each inspiration and expiration is called 

A

Residual volume

B

Vital capacity

C

Tidal Volume

D

Tidal capacity

Science Supervisor 2024
Correct Answer : C
Explanation :

Tidal volume is the amount of air that moves in or out of the lungs with each respiratory cycle. It measures around 500 mL in an average healthy adult male and approximately 400 mL in a healthy female.

Correct Answered :

Wrong Answered :

26. Which of the given diseases caused due to deficiency of iodine?

A

Cancer

B

Night Blindness

C

Goitre

D

Rickets

Science Supervisor 2024
Correct Answer : C
Explanation :

In adults, mild to moderate iodine deficiency can cause goiter as well as impaired mental function and work productivity secondary to hypothyroidism. Chronic iodine deficiency may be associated with an increased risk of the follicular form of thyroid cancer

Correct Answered :

Wrong Answered :

27. Vitamin which is believed to cure the common cold

A

A

B

K

C

C

D

E

Science Supervisor 2024
Correct Answer : C
Explanation :

Although not fully proven, large doses of vitamin C may help reduce how long a cold lasts. Large doses of vitamin C do not protect against getting a cold. Vitamin C may also be helpful for those exposed to brief periods of severe or extreme physical activity. The likelihood of success may vary from person to person.

Correct Answered :

Wrong Answered :

28. Which is the most stable ecosystem?

A

Forest

B

Desert

C

Marine

D

Grassland

Science Supervisor 2024
Correct Answer : C
Explanation :

The Marine is the most stable ecosystem:

It is stable due to its natural liquid nature (saline), dissolved oxygen, light, and temperature. An environment is considered to be stable when its structure and function remain unchanged for a long period of time. The ocean is the most stable ecosystem among the choices.

Correct Answered :

Wrong Answered :

29. What is the dominating range of light wavelengths in the lower atmosphere?

A

Less than 100 nm

B

Greater than 300 nm

C

Between 100 and 300 nm

D

All wavelengths are equally present

Science Supervisor 2024
Correct Answer : B
Explanation :

In the lower layers of the atmosphere, the range of light wavelength that is most predominant is between 400 and 700 nm, also referred to as visible light.

Correct Answered :

Wrong Answered :

30. In which sphere Ozone layer depletion is found?

A

Ionosphere

B

Stratosphere

C

Lithosphere

D

Tatosphere

Science Supervisor 2024
Correct Answer : B
Explanation :

When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere.

Correct Answered :

Wrong Answered :

31. The term vaccine was introduced by

A

Edward Jenner

B

Robert Koch

C

Louis Peter

D

Von Behring

Science Supervisor 2024
Correct Answer : A
Explanation :

Edward Jenner coined the term vaccine and vaccination. It is derived from the cow smallpox. Edward Jenner is well known for his contribution to the eradication of smallpox and immunization. In 1790, he created the world`s first vaccine for smallpox.

Correct Answered :

Wrong Answered :

CONTACT US

  • J & K

  • admin@prepmart.in

  • LIKE AND SHARE YOUR EXPERIENCE

    Like Us on Facebook Join Us on Telegram
    VISITORS COUNT 9 0 4 4 6 1
    Developed By : Azhar Rashid Teli