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Class 7th Science Chapter 1 MCQ. We covered all the Class 7th Science Chapter 1 MCQ online test with answers in this post for free so that you can practice well for the exam.
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Class 7th Science Chapter 1 MCQ for Students
Which vitamin plays a key role in helping blood to clot?
(a) Vitamin A
(b) Vitamin B
(c) Vitamin D
(d) Vitamin K
Option d – Vitamin K
Which of the following is known as ‘good cholesterol’ that helps reduce the risk of heart disease and high blood pressure?
(a) High-Density Lipoprotein (HDL)
(b) Low-Density Lipoprotein (LDL)
(c) Triglyceride
(d) Fatty acids
Option b – Low-Density Lipoprotein (LDL)
Which vitamin is present in large amounts in guava fruit?
(a) Vitamin A
(b) Vitamin B12
(c) Vitamin C
(d) Vitamin D
Option c – Vitamin C
What is the main natural source of Vitamin D for humans?
(a) Citrus fruits
(b) Green vegetables
(c) Yeast
(d) Sunlight
Option d – Sunlight
Which vitamin is usually excreted from the body through urine?
(a) Vitamin A
(b) Vitamin B
(c) Vitamin E
(d) Vitamins D and K
Option b – Vitamin B
Cattle can digest the cellulose in grass due to
(a) the presence of cellulose-digesting bacteria in their rumen
(b) their rumen producing cellulose
(c) acids present in the rumen
(d) the long retention time of cellulose in the rumen
Option a – the presence of cellulose-digesting bacteria in their rumen
If pepsin is absent from gastric juice, which of these processes would be affected in the stomach?
(a) Starch breaking down into sugars
(b) Proteins breaking down into peptides
(c) Fats breaking down into glycerol and fatty acids
(d) Digestion of nucleic acids
Option b – Proteins breaking down into peptides
Which part of the digestive system absorbs the most water and minerals?
(a) Small intestine
(b) Large intestine
(c) Stomach
(d) Oesophagus
Option b – Large intestine
The pancreas is made up of
(a) Only exocrine cells
(b) Only endocrine cells
(c) Both endocrine and exocrine cells
(d) Nephrons
Option c – Both endocrine and exocrine cells
Which of the following provides quick energy?
(a) Salt
(b) Glucose
(c) Water
(d) Starch
Option b – Glucose
If the acid-producing cells in the stomach wall are damaged, which digestion would be most affected?
(a) Only proteins
(b) Lipids
(c) Only carbohydrates
(d) Proteins and carbohydrates
Option a – Only proteins
People with Gouty Arthritis, which causes high uric acid levels, should reduce intake of which of these?
(a) Dietary fibers
(b) Nucleic acids
(c) Lipids
(d) Carbohydrates
Option b – Nucleic acids
Sugarcane is mainly grown for which of the following?
(a) Starch
(b) Glucose
(c) Fructose
(d) Sucrose
Option d – Sucrose
The term ‘Probiotic’ refers to
(b) Antacids
(c) Antibiotics
(d) Live microbial supplements
Option d – Live microbial supplements
Which chemical is used to help fruits ripen?
(a) Ethephon
(b) Atrazine
(c) Isoproturon
(d) Malathion
Option a – Ethephon
Why do soggy biscuits become crispy again when placed in a refrigerator?
(a) Cooling removes extra moisture
(b) Low humidity in the fridge absorbs the moisture
(c) High humidity in the fridge absorbs the moisture
(d) High pressure in the fridge releases extra moisture
Option b – Low humidity in the fridge absorbs the moisture
Bile juice makes the food in the digestive system
(a) Acidic
(b) Alkaline
(c) Neutral
(d) Neutral first, then acidic
Option b – Alkaline
Which vitamin can counteract anticoagulant poisons?
(a) Vitamin A
(b) Vitamin D
(c) Vitamin E
(d) Vitamin K
Option d – Vitamin K
The process by which food is absorbed by body cells for energy, growth, and repair is called
(a) Assimilation
(b) Absorption
(c) Digestion
(d) Ingestion
Option a – Assimilation
Which vitamin is also called ergocalciferol?
(a) Vitamin D2
(b) Vitamin D3
(c) Vitamin B12
(d) Vitamin B6
(e) None of the above / More than one above
Option a – Vitamin D2
Which foods are naturally rich in iodine, essential for thyroid function?
(a) Only table salt
(b) Table salt and seafood
(c) Table salt and dairy products
(d) Table salt, seafood, and dairy products
Option d – Table salt, seafood, and dairy products
What type of nutrient is insulin?
(a) Fat
(b) Vitamin
(c) Carbohydrate
(d) Protein
Option d – Protein
In the human body, Vitamin A is mainly stored in the
(a) Liver
(b) Skin
(c) Lungs
(d) Kidneys
Option a – Liver
Which of the following statements about fluid flow is incorrect?
(a) In steady flow, the velocity of liquid particles at a point remains constant.
(b) Steady flow is also known as streamlined flow.
(c) In steady flow, each particle does not necessarily follow the path of previous particles.
(d) Two streamlines can never cross each other.
Option c – In steady flow, each particle does not necessarily follow the path of previous particles.
Viscosity is a liquid’s ability to
(a) Attract nearby molecules
(b) Become electrically conductive
(c) Resist internal motion between its layers
(d) Push away neighboring molecules
Option c – Resist internal motion between its layers
When a liquid is disturbed, it settles due to
(a) Its density
(b) Surface tension
(c) Viscosity
(d) Centripetal force
Option c – Viscosity
As temperature increases, the viscosity of a liquid
(a) Increases
(b) Decreases
(c) Remains the same
(d) Can either increase or decrease depending on the liquid
Option b – Decreases
Which of the following statements is/are true?
I. Gas viscosity rises with temperature.
II. Liquid viscosity quickly drops as temperature increases.
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
Option c – Both I and II
Assertion (A): Machine parts often jam in winter.
Reason (R): The viscosity of lubricants increases at lower temperatures.
(a) Both A and R are correct, and R explains A
(b) Both A and R are correct, but R does not explain A
(c) A is correct, but R is incorrect
(d) A is incorrect, but R is correct
Option a – Both A and R are correct, and R explains A
Bernoulli’s principle is based on which conservation law?
(a) Conservation of angular momentum
(b) Conservation of linear momentum
(c) Conservation of mass
(d) Conservation of energy
Option d – Conservation of energy
The Venturimeter works on the basis of which principle?
(a) Torricelli’s Law
(b) Pascal’s Law
(c) Bernoulli’s Theorem
(d) Archimedes’ Principle
Option c – Bernoulli’s Theorem
The functioning of an atomizer is based on
a) Bernoulli’s Theorem
b) Boyle’s Law
c) Archimedes Principle
d) None of the above
Option a – Bernoulli’s Theorem
Bernoulli’s principle is applied in which of the following?
a) Dynamic lift of an aeroplane
b) Viscosity meter
c) Capillary rise
d) Hydraulic press
Option a – Dynamic lift of an aeroplane
A person standing near a railway platform feels pulled towards a fast-moving train due to
a) Gravitational attraction between the train and the person
b) Illusion experienced by the person
c) Centripetal force
d) Pressure difference created by fast-moving air
Option d – Pressure difference created by fast-moving air
When two cars pass each other at high speed, they risk side swiping because
a) Air pressure between them increases
b) Air molecule speed between them decreases
c) Air pressure between them decreases
d) Air molecule speed between them increases
Option c – Air pressure between them decreases
Soap bubbles form a spherical shape because of
a) Inertia
b) Pressure
c) Surface tension
d) Viscosity
Option c – Surface tension
In streamline flow of a fluid
a) The velocity of all particles at the same moment is the same
b) The speed of a single fluid particle stays unchanged
c) The velocity of all fluid particles passing a specific point is constant
d) The velocity of a fluid particle stays constant
Option c – The velocity of all fluid particles passing a specific point is constant
Swimming is easier in seawater compared to freshwater because
a) Seawater contains salt
b) Atmospheric pressure is highest at sea level
c) Seawater has lower density than freshwater
d) Seawater has higher density than freshwater
Option d – Seawater has higher density than freshwater
Whether an object floats or sinks in a liquid depends on ( Class 7th Science Chapter 1 MCQ )
a) Only the mass of the object
b) The mass of the object and the liquid’s density
c) The difference in densities between the object and the liquid
d) The object’s mass and shape
Option c – The difference in densities between the object and the liquid
When a floating object is slightly pushed down and released, it will
a) Start to oscillate
b) Sink to the bottom
c) Immediately return to its original position
d) Return stably to its initial position
Option b – Sink to the bottom
A boat loaded with iron nails is floating on a lake. If the nails are removed, the water level
a) Rises
b) Falls
c) Cannot be predicted
d) Stays the same
Option b – Falls
When a floating object and liquid are taken to the moon, the object will ( Class 7th Science Chapter 1 MCQ )
a) Float in the same way
b) Float with a larger portion submerged
c) Float with a smaller portion submerged
d) Sink
Option c – Float with a smaller portion submerged
The fraction of a floating ball submerged in a liquid depends on
a) Liquid’s density and ball’s mass
b) Ball’s mass and ball’s density
c) Liquid’s density and ball’s density
d) All the above factors
Option c – Liquid’s density and ball’s density
Selective serotonin reuptake inhibitor is ( Class 7th Science Chapter 1 MCQ )
a) Imipramine
b) Iproniazide
c) Fluoxetine
d) Naphazoline
Option c – Fluoxetine
Memory improvement in Alzheimer’s disease is supported by drugs that boost transmission at
a) Cholinergic receptors
b) Dopaminergic receptors
c) GABA receptors
d) Adrenergic receptors
Option a – Cholinergic receptors
Which of the following is a plasminogen activator?
a) Tranexamic acid
b) Streptokinase
c) Aminocaproic acid
d) None of the above
Option b – Streptokinase
Which drug does not act via G-protein coupled receptors? ( Class 7th Science Chapter 1 MCQ )
a) Epinephrine
b) Insulin
c) Dopamine
d) TSH
Option b – Insulin
Which of the following is not a typical antipsychotic drug?
a) Chlorpromazine
b) Haloperidol
c) Risperidone
d) Flupentixol
Option c – Risperidone
Which drug is not used to treat malaria caused by Plasmodium falciparum? ( Class 7th Science Chapter 1 MCQ )
a) Artemisinin
b) Primaquine
c) Quinine
d) Mefloquine
Option b – Primaquine
Which drug blocks the nicotinic action of acetylcholine?
a) Atropine
b) Carvedilol
c) Neostigmine
d) d-Tubocurarine
Option d – d-Tubocurarine
Which antibiotic belongs to the ansamycin group? ( Class 7th Science Chapter 1 MCQ )
a) Roxithromycin
b) Adriamycin
c) Aureomycin
d) Rifamycin
Option d – Rifamycin
Which method avoids the first-pass effect in drug administration?
a) Oral ingestion
b) Rectal suppository
c) Intravenous injection
d) None of the above
Option c – Intravenous injection
In which phase of clinical trials is ethical clearance not mandatory? ( Class 7th Science Chapter 1 MCQ )
a) Phase-1
b) Phase-2
c) Phase-3
d) Phase-4
Option d – Phase-4
Which drug shows significant first-pass metabolism?
a) Propranolol
b) Phenobarbitone
c) Phenylbutazone
d) Phenytoin
Option a – Propranolol
Pharmacovigilance mainly focuses on ( Class 7th Science Chapter 1 MCQ )
a) Monitoring drug toxicity
b) Controlling unauthorized drug production
c) Monitoring student activities
d) Managing drug costs
Option a – Monitoring drug toxicity
Stevens-Johnson syndrome is commonly linked with which drug class?
a) Sulphonamides
b) Penicillins
c) Macrolides
d) Tetracyclines
Option a – Sulphonamides
Artemisinin structure contains which functional group?
a) Endoperoxide
b) Exoperoxide
c) Epoxide
d) Acid hydrazide
Option a – Endoperoxide
Why is streptomycin not given orally for tuberculosis?
a) It degrades in the gastrointestinal tract
b) It causes severe diarrhea
c) It produces a metallic taste
d) It is not absorbed from the gastrointestinal tract
Option d – It is not absorbed from the gastrointestinal tract
In flame photometry, the analyte must be in solution to enable
a) Evaporation
b) Condensation
c) Nebulization
d) Precipitation
Option c – Nebulization
Isoniazid, a key antitubercular drug
a) Requires pyridoxine supplementation
b) Causes reversible eye complications
c) Is ototoxic and harmful to kidneys
d) Should never be used due to liver toxicity
Option a – Requires pyridoxine supplementation
How does Paclitaxel act? ( Class 7th Science Chapter 1 MCQ )
a) Intercalates DNA to prevent RNA or DNA synthesis
b) Disrupts mitosis by promoting tubulin polymerization
c) Partially blocks estrogen receptors
d) S-phase specific antimetabolite
Option b – Disrupts mitosis by promoting tubulin polymerization
Mebendazole and thiabendazole work by
a) Stimulating acetylcholine receptors at neuromuscular sites
b) Inhibiting dihydrofolate reductase
c) Disrupting microtubule formation
d) Blocking thiamine absorption
Option a – Stimulating acetylcholine receptors at neuromuscular sites
Which drug is used in Prinzmetal angina to relax blood vessels and increase coronary blood flow? ( Class 7th Science Chapter 1 MCQ )
a) Nitroglycerine
b) Nifedipine
c) Timolol
d) Isosorbide mononitrate
Option a – Nitroglycerine
Basal Metabolic Rate (BMR) is mainly influenced by
a) Body weight
b) Surface area
c) Fat content
d) Lean body mass
Option b – Surface area
Antidiuretic hormone (ADH) acts primarily on
a) Proximal tubules
b) Loop of Henle
c) Vasa recta
d) Collecting tubules
Option d – Collecting tubules
The starting compound for synthesizing Alprazolam is ( Class 7th Science Chapter 1 MCQ )
a) 3-amino-5-bromoacetophenone
b) 2-amino-5-chlorobenzophenone
c) 2-amino-5-bromoacetophenone
d) 3-amino-5-chlorobenzophenone
Option b – 2-amino-5-chlorobenzophenone
A drug delivery system formed by phospholipids creating multilamellar vesicles with aqueous layers is known as
a) Prodrugs
b) Liposomes
c) Osmotic pumps
d) Nanoparticles
Option b – Liposomes
Which of the following is a metabolite of spironolactone? ( Class 7th Science Chapter 1 MCQ )
a) Aldosterone
b) Canrenone
c) Corticosterone
d) Pregnenolone
Option b – Canrenone
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