JKSSB General Science MCQs

1. The term vaccine was introduced by

A

Edward Jenner

B

Robert Koch

C

Louis Peter

D

Von Behring

Science Supervisor 2024 REPORT
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.

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2. In which sphere Ozone layer depletion is found?

A

Ionosphere

B

Stratosphere

C

Lithosphere

D

Tatosphere

Science Supervisor 2024 REPORT
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.

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3. 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 REPORT
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.

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4. Which is the most stable ecosystem?

A

Forest

B

Desert

C

Marine

D

Grassland

Science Supervisor 2024 REPORT
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.

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5. Vitamin which is believed to cure the common cold

A

A

B

K

C

C

D

E

Science Supervisor 2024 REPORT
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.

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

A

Cancer

B

Night Blindness

C

Goitre

D

Rickets

Science Supervisor 2024 REPORT
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

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7. 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 REPORT
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.

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

A

Goitre

B

Anaemia

C

Kwashiorkor

D

Chickenpox

Science Supervisor 2024 REPORT
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.

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9. 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 REPORT
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.

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10. 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 REPORT
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.

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11. 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 REPORT
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

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12. 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 REPORT
Correct Answer: A
Explanation:

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

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13. 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 REPORT
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.

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14. 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.

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15. 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 REPORT
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.

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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 REPORT
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.

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17. Which vitamin is crucial for the absorption of calcium in the body?

A

Vitamin A

B

Vitamin B12

C

Vitamin C

D

Vitamin D

Vitamins Supervisor 2024 REPORT
Correct Answer: D
Explanation:

Optimal vitamin D levels are necessary to increase the efficiency of calcium absorption. Without adequate vitamin D, the body absorbs no more than 10% to 15% of dietary calcium.

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18. which micronutrient is body`s main source of energy?

A

Proteins

B

Fats

C

Carbohydrates

D

Vitamins

Vitamins Supervisor 2024 REPORT
Correct Answer: C
Explanation:

Carbohydrates are the preferred source of energy. If the diet does not provide adequate carbohydrates the body will draw mainly upon proteins for its energy needs. By eating adequate amounts of carbohydrates, proteins will be spared to be used for growth, development and regulatory functions of the body.

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19. Most kidney stones are usually in the form of which among the following?

A

Sodium nitrate

B

Zinc oxide

C

Calcium oxalate

D

None of these

Biology JKPSI 2022 CBT REPORT
Correct Answer: C
Explanation:

Most kidney stones are calcium stones, usually in the form of calcium oxalate. Oxalate is a substance made daily by your liver or absorbed from your diet. Certain fruits and vegetables, as well as nuts and chocolate, have high oxalate content.

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20. Which among the following causes Typhoid?

A

Anopheles

B

Tubercule bacillli

C

Variola virus

D

Salmonella typhi

Biology JKPSI 2022 CBT REPORT
Correct Answer: D
Explanation:

Typhoid fever is caused by a type of bacteria called Salmonella typhi

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21. Most toxic metal pollutant of automobile exhaust is which of the following?

A

Cadmium

B

Lead

C

Copper

D

None of these

Chemistry JKPSI 2022 CBT REPORT
Correct Answer: B
Explanation:

Lead

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22. Which among the following is also called index of refraction, measure of the bending of a ray of light when passing from one medium into another?

A

Amplitude

B

velocity

C

Refractive index

D

None of these

Physics JKPSI 2022 CBT REPORT
Correct Answer: C
Explanation:

refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another.

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23. Which among the following is/are good conductor of electricity?

A

Graphite

B

Copper

C

Silver

D

All of these

Physics JKPSI 2022 CBT REPORT
Correct Answer: D
Explanation:

All of these

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24. Which of the following processes does not add CO2 to the atmosphere?

A

Volcanic eruption

B

Organic matter decay

C

Photosynthesis

D

All of these

Biology JKPSI 2022 CBT REPORT
Correct Answer: C
Explanation:

Notice that photosynthesis and respiration are essentially the opposite of one another. Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.

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25. ____ is the spontaneous passage or diffusion of water or other  solvents through a semipermeable membrane.

A

Transpiration

B

Osmosis

C

Diffusion

D

Penetration

Biology JKPSI 2022 CBT VERIFIED
Correct Answer: B
Explanation:

osmosis, the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane (one that blocks the passage of dissolved substances—i.e., solutes).

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26. The infertile Saline soils contain largely proportion of which of the following?

A

Zinc, Sodium and Magnesium

B

Copper, Sodium and Potassium

C

Sodium, Potassium and Magnesium

D

Bronze, Magnesium and Sulphur

Chemistry JKPSI 2022 CBT REPORT
Correct Answer: C
Explanation:

Saline soils contain a larger proportion of sodium, potassium, and magnesium, and thus, they are infertile and do not support any vegetative growth. They have more salts, largely because of the dry climate and poor drainage.

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27. The saliva contains an enzyme called ____ that breaks down carbohydrates which is a complex molecule to give sugar.

A

isomerase

B

sucrase

C

kinase

D

salivary

Biology JKPSI 2022 CBT REPORT
Correct Answer: D
Explanation:

Salivary amylase is a glucose-polymer cleavage enzyme that is produced by the salivary glands.

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28. During sleep, the blood pressure of human beings _____

A

Increase

B

Decrease

C

First decrease and then increase

D

Remain same

Biology JKPSI 2022 CBT REPORT
Correct Answer: B
Explanation:

Decrease

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29. Naphthalene is a volatile solid and is best purified by which of the following?

A

Crystallisation

B

Distillation

C

Steam distillation

D

Sublimation

Chemistry JKPSI 2022 CBT REPORT
Correct Answer: D
Explanation:

Naphthalene, being a subliming solid, is purified by sublimation.

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30. Different substances have different vapor pressures at a given temperature due to the strength of their ____

A

aerosol

B

intermolecular forces

C

allotrope

D

both aerosol and allotrope

Chemistry JKPSI 2022 CBT REPORT
Correct Answer: B
Explanation:

Different substances have different vapor pressures at a given temperature due to the strength of their intermolecular forces. For molecules to escape into the vapor phase, they must have enough kinetic energy to overcome the intermolecular forces of other molecules at the surface of the liquid.

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