Enzymes are ______...? Mcqs

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Enzymes are ______...?

(A) Steroid in nature
(B) Protein in nature

(C) Lipid in nature
(D) Carbohydrate in nature

✅ Correct Answer: Protein in nature

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Source: This question is taken from the Everyday Science

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Colour of the plants is green due to the presence of _________....?

(A) Carbon dioxide
(B) Chlorophyll

(C) Urea
(D) Oxygen

✅ Correct Answer: Chlorophyll

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The part of an eye acting as a black point of camera is ______...?

(A) Sclera
(B) Retina

(C) Optic disc
(D) Choroid

✅ Correct Answer: Choroid

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Oscillations are damped due to the presence of ______...?

(A) Linear motion
(B) Restoring force

(C) Frictional force
(D) Mechanical force

✅ Correct Answer: Frictional force

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Enzyme changes in pH can cause enzymes to ______...?

(A) Denature
(B) Activate

(C) Inhibit
(D) Stabilize

✅ Correct Answer: Denature

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The book “Kitab-ul-manazir” was written by ______...?

(A) Jabir bin Hayan
(B) Ibn-al-Haitham

(C) Ali Ibn-Isa
(D) Bu-Ali Sina

✅ Correct Answer: Ibn-al-Haitham

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Fan was invented by___________...?

(A) Arthur Schimit
(B) Alfered Nobel

(C) Skaats Wheeler
(D) None of these

✅ Correct Answer: Skaats Wheeler

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The point within the Earth where earthquakes originate is _________...?

(A) Comma
(B) Origin

(C) Epicenter
(D) Focus

✅ Correct Answer: Rashid Mehmood

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The number of spark plugs needed in a diesel engine is ______...?

(A) Zero
(B) 1

(C) 2
(D) 4

✅ Correct Answer: Zero

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A loudspeaker changes _________ energy into sound energy....?

(A) Chemical
(B) Electrical

(C) Light
(D) Kinetic

✅ Correct Answer: Electrical

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The medical branch of science that deals with the study of skin, its functions, diseases, & treatment is ________ ...?

(A) Dermatology
(B) Dormatology

(C) Deontology
(D) Dermatoglyphics

✅ Correct Answer: Dermatology

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A Barometer is device used to measure ______...?

(A) Humidity
(B) Atmospheric Pressure

(C) Room Temperature
(D) Salt in sea water

✅ Correct Answer: Atmospheric Pressure

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At night, Plants intake __________ and release __________...?

(A) Oxygen – Carbon dioxide
(B) Carbon dioxide – Oxygen

(C) Oxygen – Carbon monoxide
(D) None of theseCarbon monoxide – Oxygen

✅ Correct Answer: Oxygen – Carbon dioxide

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Atom was a name given by ____________ ...?

(A) Democritus
(B) Bohr

(C) Rutherford
(D) Archimedes

✅ Correct Answer: Democritus

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The type of seed production without fusion of male and female gametes is ______...?

(A) Parthenocarpy
(B) Apomixes

(C) Grafting
(D) Scion

✅ Correct Answer: Apomixes

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Two resistances of 6 Ω and 12 Ω are connected in parallel. Their net resistance is ______...?

(A) 7 Ω
(B) 6 Ω

(C) 4 Ω
(D) 5 Ω

✅ Correct Answer: 4 Ω

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Summer solstice means__________...?

(A) longest day
(B) longest night

(C) smallest day
(D) none of these

✅ Correct Answer: longest day

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Diamond is a very expensive ornament. It is composed of a single element ___________...?

(A) Carbon
(B) Gold

(C) Silver
(D) Platinum

✅ Correct Answer: Carbon

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A D.C motor converts _______...?

(A) Mechanical energy into electrical energy
(B) Mechanical energy into chemical energy

(C) Electrical energy into mechanical energy
(D) Electrical energy into chemical energy

✅ Correct Answer: Electrical energy into mechanical energy

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Flame test of Copper Halide with bluish-green color identify the presence of ______...?

(A) Halogen
(B) Hydrogen

(C) Copper
(D) B and C

✅ Correct Answer: Copper

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Polyethene is ______...?

(A) Oil
(B) Paper

(C) Plastic
(D) Wood

✅ Correct Answer: Plastic

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The turn ratios of a transformer is 10. It means ______...?

(A) Is = 10 Ip
(B) Np - 10Ns

(C) Ns = 10 Np
(D) Vs = 10 Vp

✅ Correct Answer: Ns = 10 Np

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Gravity setting chambers are used in industries to remove ________...?

(A) NOx
(B) SOx

(C) CO
(D) Suspended particulate matter

✅ Correct Answer: Suspended particulate matter

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Afternoon rains in the equatorial region are the result of influences _______...?

(A) Land Breeze
(B) Monsoon

(C) Frontal
(D) Convectional

✅ Correct Answer: Convectional

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Drugs that slow normal brain functioning are categorized as ______...?

(A) Narcotics
(B) Hallucinogen

(C) Marijuana
(D) Sedatives

✅ Correct Answer: Sedatives

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A term biotype means ___________...?

(A) all individuals having same phenotype
(B) all individuals having same genotype

(C) all individual with different phenotype
(D) all individuals with different genotype

✅ Correct Answer: all individuals having same phenotype

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Alkenes ______...?

(A) Show the same general formula as alkynes
(B) Have carbon-carbon triple bond

(C) Have carbon-carbon double bond
(D) Are saturated hydrocarbons

✅ Correct Answer: Have carbon-carbon double bond

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A set of metabolism reaction which maintain internal environment is ______...?

(A) Positive feedback
(B) Negative feedback

(C) Osmoregulation
(D) Homeostasis

✅ Correct Answer: Homeostasis

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The most abundant element in the universe is __________....?

(A) Oxygen
(B) Hydrogen

(C) Carbon Dioxide
(D) Silicon

✅ Correct Answer: Hydrogen

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The pyramid of energy in any ecosystem is _________...?

(A) Always upright
(B) May be upright or invented

(C) Always inverted
(D) Always Circle

✅ Correct Answer: Always upright

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The SI unit of Dipole moment is __________...?

(A) Debye
(B) Cm

(C) Weber
(D) Coulumb

✅ Correct Answer: Debye

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Deficiency of __________ causes loss of appetite and poor growth...?

(A) zinc
(B) iodine

(C) copper
(D) iron

✅ Correct Answer: zinc

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The error caused by improper functioning of instrument is ______...?

(A) Determinant Error
(B) Systematic Error

(C) Indeterminant
(D) A and B

✅ Correct Answer: Systematic Error

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Escape velocity depends on ________...?

(A) Mass of the object trying to escape
(B) Radius of the planet or celestial body

(C) Both mass and radius of the planet or celestial body
(D) The velocity of the rotating planet

✅ Correct Answer: Both mass and radius of the planet or celestial body

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An Average Hummingbird’s heart rate per minute is __________....?

(A) 500 times
(B) 1000 times

(C) more than 1000 times
(D) more than 1200 times

✅ Correct Answer: more than 1200 times

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The part of an eye acting as a diaphragm of camera is ______...?

(A) Cornea
(B) Lens

(C) Iris
(D) Retina

✅ Correct Answer: Iris

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The main function of the kidney is ____________...?

(A) To control blood pressure
(B) To control body temperature

(C) To remove waste product from the body
(D) To help in digestion of food

✅ Correct Answer: To remove waste product from the body

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The type of lens in our eye is ______...?

(A) Convex
(B) Concave

(C) Both a & b
(D) None of these

✅ Correct Answer: Convex

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Atmospheric pressure at sea level is _______...?

(A) 746 mm
(B) 760 mm

(C) 820 mm
(D) None of these

✅ Correct Answer: 760 mm

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Mohus scale is used for to measure ____________...?

(A) Hardness
(B) Humidity

(C) Pressure
(D) Temperature

✅ Correct Answer: Hardness

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Silver fish is the name of__________...?

(A) Insect
(B) Fish

(C) Bird
(D) Mammal

✅ Correct Answer: Insect

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The permanent hardness of water is due to presence ______...?

(A) MgSO4
(B) Mg(HCO3)₂

(C) CA(HCO3)2
(D) All of these

✅ Correct Answer: MgSO4

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The part of brain involved in balance and precision in movements is ______...?

(A) Cerebrum
(B) Cerebellum

(C) Thalamus
(D) Medulla oblongata

✅ Correct Answer: Cerebellum

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Ozone layer prevents ______________ radiation from entering the atmosphere...?

(A) Infra-red
(B) Ultraviolet

(C) X-rays
(D) Gamma rays

✅ Correct Answer: Ultraviolet

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In the Composition of the earth, Aluminum is _______________...?

(A) 27.5%
(B) 20.3%

(C) 14.5%
(D) 8.23%

✅ Correct Answer: 8.23%

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Largest moon in our solar system is ________...?

(A) Deimos
(B) Ganymede

(C) Phobos
(D) Arche

✅ Correct Answer: Ganymede

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The S. I. unit of refractive index is _______...?

(A) meter
(B) cm

(C) watt
(D) no unit

✅ Correct Answer: no unit

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An active asteroid is discovered near ________ Orbit for the first time in billion years....?

(A) Saturn
(B) Mars

(C) Neptune
(D) Jupiter

✅ Correct Answer: Jupiter

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Atmospheric pressure decrease rapidly with altitude because the air becomes_______ ...?

(A) Colder
(B) Less denser

(C) Rich in Ozone
(D) Warmer

✅ Correct Answer: Less denser

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The Summer solstice in the Northern Hemisphere happens on: __________...?

(A) 21 July
(B) 22 December

(C) 22 March
(D) 21 June

✅ Correct Answer: 21 June

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Pluviometer measures ___________...?

(A) Wind
(B) Strength of Plywood

(C) Rainfall
(D) None of these

✅ Correct Answer: Rainfall

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The symbol denotes the proton number is ______...?

(A) P
(B) N

(C) Z
(D) A

✅ Correct Answer: Z

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Winter Solstice means____________...?

(A) longest night
(B) longest day

(C) smallest night
(D) smallest day

✅ Correct Answer: longest night

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Other name of platelets _______...?

(A) Erythrocytes
(B) Leukocytes

(C) thrombocytes
(D) None of these

✅ Correct Answer: thrombocytes

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A chronometer meter measures __________ ...?

(A) Water waves
(B) Color contrast

(C) Time
(D) Sound waves

✅ Correct Answer: Time

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The biggest planet in solar system is ______ and having _____ moons...?

(A) Uranus , Sixteen
(B) Jupiter, Seventy-nine

(C) Saturn, Sixteen
(D) Uranus, two

✅ Correct Answer: Jupiter, Seventy-nine

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During which process does heat transfer occur because of density differences__________...?

(A) Convection
(B) Radiation

(C) Conduction
(D) None of these

✅ Correct Answer: Convection

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The activity in relation to changes in environment is ______...?

(A) Stimulus
(B) Response

(C) Both a & b
(D) None of these

✅ Correct Answer: Response

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Volvox is a polyphyletic genus of _______...?

(A) Green algae
(B) Red algae

(C) Brown algae
(D) None of these

✅ Correct Answer: Green algae

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Scurvy is caused due to the deficiency of ___________...?

(A) Vitamin A
(B) Vitamin D

(C) Vitamin C
(D) None of these

✅ Correct Answer: Vitamin C

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Inspiration involves ______...?

(A) Contraction of intercostals muscles
(B) Contraction of diaphragm

(C) Inward movement of ribs
(D) Both a and b

✅ Correct Answer: Both a and b

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A saturated solution of KCl on heating becomes _______...?

(A) Unsaturated
(B) Supersaturated

(C) Diluted
(D) All of these

✅ Correct Answer: Supersaturated

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Zero error of the instrument is _______...?

(A) Systematic error
(B) Human error

(C) Random error
(D) Classified error

✅ Correct Answer: Systematic error

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Second highest layer of Earth's atmosphere is _______...?

(A) Troposphere
(B) Stratosphere

(C) Mesosphere
(D) Thermosphere

✅ Correct Answer: Stratosphere

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The density of gases increases when its ______...?

(A) Pressure increased
(B) Temperature increased

(C) Volume increased
(D) None of these

✅ Correct Answer: Pressure increased

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When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...?

(A) 48.8°
(B) 50.0°

(C) 49.1°
(D) 51.0°

✅ Correct Answer: 48.8°

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Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate
(B) Calcium sulfate

(C) Calcium bicarbonate
(D) None of these

✅ Correct Answer: Calcium sulfate

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By which process copper is refined ____________...?

(A) Roasting
(B) Oxidation

(C) Zone Refining
(D) Electrolysis

✅ Correct Answer: Roasting

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An example of rhizome is_________...?

(A) Carrot
(B) Tomato

(C) Ginger
(D) Garlic

✅ Correct Answer: Ginger

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Two capacitors of 8µF are connected in series then the equivalent capacitance is ______...?

(A) ¼ µF
(B) 2 µF

(C) 3 µF
(D) 4 µF

✅ Correct Answer: 4 µF

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Newton's law of gravitation is consistent with Newton's _________ law of motion....?

(A) 1st
(B) 2nd

(C) 3rd
(D) All of them

✅ Correct Answer: 3rd

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The main factor for determining a region’s climate is ___________...?

(A) Latitude
(B) Temperature

(C) Longitude
(D) None of them

✅ Correct Answer: Latitude

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A piece of matter in pure form is termed as ______...?

(A) Redical
(B) Mixture

(C) Compound
(D) Substance

✅ Correct Answer: Substance

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The altitude on stratosphere is ______...?

(A) 40 to 45 km
(B) 50 to 55 km

(C) 60 to 65 km
(D) 70 to 75 km

✅ Correct Answer: 50 to 55 km

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The major source of quick energy is ___________...?

(A) Carbohydrates
(B) Minerals

(C) vitamins
(D) None of these

✅ Correct Answer: Carbohydrates

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Spring balance is used to measure _________...?

(A) Mass
(B) Weight

(C) Elasticity
(D) Density

✅ Correct Answer: Weight

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When a light ray enters from a denser medium to a rare medium, it bends ______...?

(A) Perpendicular to normal
(B) Parallel to normal

(C) Toward normal
(D) Away from normal

✅ Correct Answer: Away from normal

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When one atom forms cation by losing electron and other forms anion by accepting that electron then bond form between them is ______...?

(A) Covalent bond
(B) Ionic bond

(C) Coordinate covalent bond
(D) Hydrogen bond

✅ Correct Answer: Ionic bond

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