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Everyday Science MCQs

290 Questions Subject Test
Subject Preparation Guide

Prepare Everyday Science with confidence

Understand the science behind daily life through questions covering health, energy, environment, inventions and natural phenomena.

Human BodyEnergyEnvironmentScientific Inventions
Important for general science portions of CSS, PMS, FPSC and provincial tests.
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161
Medium fpsc ppsc nts

Which flexible connective tissue cushions joints and is found in structures like the ear and nose?

  • A Tendon
  • B Ligament
  • C Cartilage
  • D Bone marrow
Permalink
Correct Answer: Option C — Cartilage
Explanation: Cartilage is a flexible connective tissue that cushions joints reduces friction between bones and provides structural support in areas like the ear and nose.
Submitted by: PaperMCQs
162
Hard fpsc ppsc nts

Which chamber of the heart pumps oxygenated blood out to the rest of the body?

  • A Right atrium
  • B Right ventricle
  • C Left atrium
  • D Left ventricle
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Correct Answer: Option D — Left ventricle
Explanation: The left ventricle pumps oxygenated blood received from the lungs out to the rest of the body through the aorta making it the heart's most muscular chamber.
Submitted by: PaperMCQs
163
Hard fpsc ppsc nts

Which chamber of the heart receives deoxygenated blood from the body before sending it to the lungs?

  • A Left atrium
  • B Right atrium
  • C Left ventricle
  • D Right ventricle
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Correct Answer: Option B — Right atrium
Explanation: The right atrium receives deoxygenated blood returning from the body and passes it to the right ventricle which then pumps it to the lungs for oxygenation.
Submitted by: PaperMCQs
164
Medium fpsc ppsc nts

Which tiny blood vessels allow the exchange of oxygen nutrients and waste between blood and body tissues?

  • A Arteries
  • B Veins
  • C Capillaries
  • D Venules
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Correct Answer: Option C — Capillaries
Explanation: Capillaries are tiny thin walled blood vessels that allow the exchange of oxygen nutrients and waste products between the blood and surrounding body tissues at the cellular level.
Submitted by: PaperMCQs
165
Easy fpsc ppsc nts

Which blood vessels carry deoxygenated blood back to the heart from body tissues?

  • A Arteries
  • B Veins
  • C Capillaries
  • D Arterioles
Permalink
Correct Answer: Option B — Veins
Explanation: Veins carry deoxygenated blood back to the heart from body tissues and contain valves to prevent backward flow especially important in the limbs against gravity.
Submitted by: PaperMCQs
166
Easy fpsc ppsc nts

Which blood vessels carry oxygenated blood away from the heart to the rest of the body?

  • A Veins
  • B Arteries
  • C Capillaries
  • D Venules
Permalink
Correct Answer: Option B — Arteries
Explanation: Arteries carry oxygenated blood away from the heart to various tissues and organs throughout the body with the aorta being the largest and most significant artery.
Submitted by: PaperMCQs
167
Medium fpsc ppsc nts

Which structure in the heart prevents the backward flow of blood between chambers?

  • A Valves
  • B Arteries
  • C Veins
  • D Capillaries
Permalink
Correct Answer: Option A — Valves
Explanation: Heart valves prevent the backward flow of blood between chambers ensuring efficient one directional circulation throughout the cardiovascular system during each heartbeat.
Submitted by: PaperMCQs
168
Medium fpsc ppsc nts

Which muscle separates the chest cavity from the abdominal cavity and assists in breathing?

  • A Diaphragm
  • B Intercostal muscles
  • C Trapezius
  • D Bicep
Permalink
Correct Answer: Option A — Diaphragm
Explanation: The diaphragm is a dome shaped muscle that separates the chest cavity from the abdominal cavity and contracts and relaxes to facilitate inhalation and exhalation.
Submitted by: PaperMCQs
169
Medium fpsc ppsc nts

Which flap of tissue prevents food from entering the trachea during swallowing?

  • A Larynx
  • B Epiglottis
  • C Pharynx
  • D Esophagus
Permalink
Correct Answer: Option B — Epiglottis
Explanation: The epiglottis is a flap of tissue that folds over the trachea during swallowing preventing food and liquids from entering the airway and causing choking.
Submitted by: PaperMCQs
170
Medium fpsc ppsc nts

Which structure in the throat is commonly known as the voice box and is responsible for sound production?

  • A Pharynx
  • B Larynx
  • C Trachea
  • D Epiglottis
Permalink
Correct Answer: Option B — Larynx
Explanation: The larynx commonly known as the voice box contains vocal cords that vibrate to produce sound and also helps protect the airway during swallowing.
Submitted by: PaperMCQs
171
Medium fpsc ppsc nts

Which structure connects the throat to the lungs and branches into smaller airways within the chest?

  • A Esophagus
  • B Trachea
  • C Larynx
  • D Pharynx
Permalink
Correct Answer: Option B — Trachea
Explanation: The trachea commonly known as the windpipe connects the throat to the lungs branching into smaller airways called bronchi that direct air into each lung.
Submitted by: PaperMCQs
172
Medium fpsc ppsc nts

Which part of the human respiratory system is primarily responsible for warming and filtering incoming air?

  • A Trachea
  • B Nasal cavity
  • C Bronchi
  • D Alveoli
Permalink
Correct Answer: Option B — Nasal cavity
Explanation: The nasal cavity warms moistens and filters incoming air removing dust and pathogens before it travels further into the respiratory system for gas exchange.
Submitted by: PaperMCQs
173
Medium fpsc ppsc nts

Which organ in the human body acts as a reservoir for blood and helps filter out old or damaged red blood cells?

  • A Liver
  • B Spleen
  • C Pancreas
  • D Kidney
Permalink
Correct Answer: Option B — Spleen
Explanation: The spleen acts as a reservoir for blood and filters out old or damaged red blood cells while also playing a role in immune system function within the body.
Submitted by: PaperMCQs
174
Easy fpsc ppsc nts

Which organ produces insulin to regulate blood sugar levels in the body?

  • A Liver
  • B Pancreas
  • C Kidney
  • D Spleen
Permalink
Correct Answer: Option B — Pancreas
Explanation: The pancreas produces insulin a hormone that regulates blood sugar levels by allowing cells to absorb glucose from the bloodstream for energy or storage.
Submitted by: PaperMCQs
175
Medium fpsc ppsc nts

Which organ stores bile produced by the liver until it is needed for digestion?

  • A Pancreas
  • B Gallbladder
  • C Stomach
  • D Spleen
Permalink
Correct Answer: Option B — Gallbladder
Explanation: The gallbladder stores and concentrates bile produced by the liver releasing it into the small intestine when needed to help digest fatty foods consumed during meals.
Submitted by: PaperMCQs
176
Medium fpsc ppsc nts

Which organ produces bile that aids in the digestion of fats?

  • A Pancreas
  • B Liver
  • C Gallbladder
  • D Stomach
Permalink
Correct Answer: Option B — Liver
Explanation: The liver produces bile which is stored in the gallbladder and released into the small intestine to emulsify fats making them easier to digest and absorb.
Submitted by: PaperMCQs
177
Easy fpsc ppsc nts

Which acid in the stomach helps in the digestion of food and kills harmful bacteria?

  • A Sulfuric acid
  • B Hydrochloric acid
  • C Acetic acid
  • D Citric acid
Permalink
Correct Answer: Option B — Hydrochloric acid
Explanation: Hydrochloric acid secreted by stomach glands helps digest food by activating pepsin and also kills many harmful bacteria that may be present in ingested food.
Submitted by: PaperMCQs
178
Medium fpsc ppsc nts

Which stomach enzyme is primarily responsible for breaking down proteins into smaller peptides?

  • A Amylase
  • B Lipase
  • C Pepsin
  • D Trypsin
Permalink
Correct Answer: Option C — Pepsin
Explanation: Pepsin is a stomach enzyme that breaks down proteins into smaller peptides functioning optimally in the highly acidic environment created by hydrochloric acid in the stomach.
Submitted by: PaperMCQs
179
Medium fpsc ppsc nts

Which enzyme present in saliva begins the digestion of starch in the mouth?

  • A Pepsin
  • B Amylase
  • C Lipase
  • D Trypsin
Permalink
Correct Answer: Option B — Amylase
Explanation: Amylase present in saliva begins breaking down starch into simpler sugars during the initial stage of digestion before food even reaches the stomach.
Submitted by: PaperMCQs
180
Easy fpsc ppsc nts

Which gland produces saliva to aid in the initial digestion of food in the mouth?

  • A Pituitary gland
  • B Salivary gland
  • C Thyroid gland
  • D Adrenal gland
Permalink
Correct Answer: Option B — Salivary gland
Explanation: Salivary glands produce saliva containing enzymes like amylase that begin breaking down starches in food while also moistening it to ease swallowing and digestion.
Submitted by: PaperMCQs
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