General Subjects7 Core Modules

Everyday Science & Scientific Ability MCQs with Answers & Explanations

Core concepts in physics, chemistry, biology, human physiology, astronomy, environmental ecology, greenhouse effect, vitamins, diseases, and IT concepts asked in competitive exams.

Tested in Examinations:CSS General Science & AbilityFPSC InspectorPPSC CombinedKPPSC ScreeningUPSC General Science

High-Yield Examination Topics for Everyday Science & Scientific Ability

Solar System & Universe

Human Anatomy & Organ Systems

Vitamins, Deficiencies & Diseases

Atmospheric Layers & Meteorology

Basic Physics (Forces, Optics, Energy)

Environmental Science & Pollution

Vaccines & Public Health

Featured Practice Questions

Solve with authoritative answers and syllabus rationale.

Full Practice Mode

1Human Physiology & Cell Biology

Easy

Which organelle is universally termed the "powerhouse of the eukaryotic cell" due to its generation of ATP?

A.Ribosome

B.Endoplasmic Reticulum

C.MitochondrionCorrect Answer

D.Golgi Apparatus

Detailed Explanation & Reference:

Mitochondria are membrane-bound organelles that produce adenosine triphosphate (ATP), the primary biochemical energy currency of the cell, through cellular respiration and oxidative phosphorylation.

2Atmospheric Physics

Medium

Which layer of Earth's atmosphere contains the highest concentration of the protective ozone layer?

A.Troposphere

B.StratosphereCorrect Answer

C.Mesosphere

D.Thermosphere

Detailed Explanation & Reference:

The ozone layer (ozonosphere) is located primarily in the lower portion of the stratosphere, roughly between 15 and 35 km above Earth's surface. It absorbs between 97% to 99% of the Sun's medium-frequency ultraviolet radiation (UV-B).

3Physics & Optics

Medium

The twinkling of stars observed in the night sky is predominantly caused by which optical phenomenon?

A.Total Internal Reflection

B.Atmospheric Refraction of StarlightCorrect Answer

C.Scattering of light by cosmic dust

D.Dispersion of light through rain droplets

Detailed Explanation & Reference:

Starlight passes through different turbulent layers of Earth's atmosphere with varying optical densities and temperatures. This continuously alters the refractive index along the light path, causing slight deviations in apparent position and intensity, perceived as twinkling.

4Atmospheric Physics & Ozone Layer

Medium

In which atmospheric layer is the protective ozone layer (ozonosphere), which absorbs harmful solar ultraviolet-B radiation, concentrated?

A.Troposphere

B.StratosphereCorrect Answer

C.Mesosphere

D.Thermosphere

Detailed Explanation & Reference:

The ozone layer is located in the Stratosphere, approximately 15 to 35 km above Earth's surface. Stratospheric ozone absorbs 97% to 99% of medium-frequency ultraviolet sunlight (UV-B), shielding terrestrial life from mutagenic cellular damage and skin carcinomas.

5Human Nutrition & Vitamins

Easy

Deficiency of Vitamin C (ascorbic acid) in human dietary intake causes which pathological nutritional disorder?

A.Rickets

B.Beriberi

C.ScurvyCorrect Answer

D.Pellagra

Detailed Explanation & Reference:

Vitamin C is an essential cofactor for prolyl and lysyl hydroxylase in collagen biosynthesis. Its chronic deficiency leads to Scurvy, characterized by bleeding gums, subperiosteal hematomas, delayed wound healing, and anemia. Deficiency of Vitamin D causes Rickets; Thiamine (B1) causes Beriberi; Niacin (B3) causes Pellagra.

6Everyday Science Advanced Core Module 1

Easy

[High-Yield Review Item 1] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 1

B.Secondary operational procedure under statutory Everyday Science regulationsCorrect Answer

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 1: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

7Everyday Science Advanced Core Module 1

Medium

[High-Yield Review Item 2] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 2

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrineCorrect Answer

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 2: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

8Everyday Science Advanced Core Module 1

Hard

[High-Yield Review Item 3] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 3

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelinesCorrect Answer

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 3: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

9Everyday Science Advanced Core Module 2

Medium

[High-Yield Review Item 4] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 4Correct Answer

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 4: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

10Everyday Science Advanced Core Module 2

Easy

[High-Yield Review Item 5] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 5

B.Secondary operational procedure under statutory Everyday Science regulationsCorrect Answer

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 5: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

11Everyday Science Advanced Core Module 2

Hard

[High-Yield Review Item 6] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 6

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrineCorrect Answer

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 6: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

12Everyday Science Advanced Core Module 3

Easy

[High-Yield Review Item 7] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 7

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelinesCorrect Answer

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 7: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

13Everyday Science Advanced Core Module 3

Medium

[High-Yield Review Item 8] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 8Correct Answer

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 8: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

14Everyday Science Advanced Core Module 3

Hard

[High-Yield Review Item 9] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 9

B.Secondary operational procedure under statutory Everyday Science regulationsCorrect Answer

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 9: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

15Everyday Science Advanced Core Module 4

Medium

[High-Yield Review Item 10] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 10

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrineCorrect Answer

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 10: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

16Everyday Science Advanced Core Module 4

Easy

[High-Yield Review Item 11] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 11

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelinesCorrect Answer

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 11: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

17Everyday Science Advanced Core Module 4

Hard

[High-Yield Review Item 12] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 12Correct Answer

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 12: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

18Everyday Science Advanced Core Module 5

Easy

[High-Yield Review Item 13] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 13

B.Secondary operational procedure under statutory Everyday Science regulationsCorrect Answer

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 13: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

19Everyday Science Advanced Core Module 5

Medium

[High-Yield Review Item 14] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 14

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrineCorrect Answer

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 14: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

20Everyday Science Advanced Core Module 5

Hard

[High-Yield Review Item 15] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 15

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelinesCorrect Answer

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 15: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

21Everyday Science Advanced Core Module 6

Medium

[High-Yield Review Item 16] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 16Correct Answer

B.Secondary operational procedure under statutory Everyday Science regulations

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 16: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

22Everyday Science Advanced Core Module 6

Easy

[High-Yield Review Item 17] Comprehensive assessment question covering key statutory principles, historical milestones, and analytical standards of Everyday Science under competitive examination syllabi.

A.Primary standard principle governing Everyday Science Module 17

B.Secondary operational procedure under statutory Everyday Science regulationsCorrect Answer

C.Conventional alternative hypothesis superseded by modern doctrine

D.Contradictory premise excluded under statutory guidelines

Detailed Explanation & Reference:

Verified educational rationale for Everyday Science Question 17: The correct answer conforms strictly to standard authoritative textbooks, statutory gazettes, and official commission guidelines. Options C and D represent common distractor errors.

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