Class 6th Science MCQs - Home of Knowledge

Class 6th Science MCQs

Class 6th Science MCQs


1.. Microscope is an instrument which helps us to see ________

A) Large objects

B) Small objects

C) Far objects

D) All of the above

2.. The outer most covering of animal cell is……..

A) Cell membrane

B) Cell wall

C) Nuclear membrane

D) Tonoplast


3.. ……… is called power house of the cell.

A) Cytoplasm

B) Nucleus

C) Ribosome

D) Mitochondria


4.. Ribosome is called ……….

A) Protein synthesizing factory

B) Energy production unit

C) Power house of the cell

D) Nutrient supplier


In plant cell nucleus is………

A) In center

B) at one side

C) Inside the chloroplast

D) Absent


Amoeba is a ……….. Organism

A) Unicellular

B) Colonial

C) Multicellular

D) None of the above


Arrange from lower to higher. i) Cell ii) organ system iii) Organ iv) Organism v) Tissue

A) i → ii → iii → iv → v

B) i → ii → iii → v → iv

C) i → v → iii → ii → iv

D) i → iii → ii → iv → v


First layer of eye is called ………

A) Sclerotic

B) Retina

C) Choroid

D) Pupil


Bronchi are parts of _________

A) Respiratory system

B) Reproductive system

C) Circulatory system

D) None of the above


Human beings have _____ main senses or sense organs.

A) 3

B) 4

C) 5

D) 6



Second layer of the eye is called _______

A) Retina

B) Choroid

C) Sclerotic

D) Pupil


Third layer of the eye is called _______

A) Retina

B) Choroid

C) Sclerotic

D) Pupil


Each time you blink your eyes for ______ seconds

A) 0.1

B) 0.2

C) 0.3

D) 0.4


Normally during eyes blinking our eyes remain closed for about  _______ minutes in whole day.

A) 30 minutes

B) 60 minutes

C) 70 minutes

D) 80 minutes


Cornea is a part of ______ layer of eye.

A) 1st

B) 2nd

C) 3rd

D) Both third and first


Image formed on _______

A) Cornea

B) Retina

C) Choroid

D) Pupil


The middle ear contains _____ bones.

A) 2

B) 3

C) 4

D) 5



Smallest bone in the body is ________

A) Malleus

B) Incus

C) Stapes

D) Femur


The coiled tube in inner ear is called _______

A) Ear drum

B) Vestibule

C) Stirrup

D) Cochlea



Ear also performs another function. The function is _____

A) Production of nutrients

B) Digestion of glucose

C) Balance of the body

D) Control eyes


There are about _______ touch receptors in finger tips.

A) 10

B) 100

C) 10000

D) 100000


Your nose can recognize __________ smells.

A) 40 to 100

B) 100 to 400

C) 400 to 550

D) 4000 to 10,000


Compare senses and select the right choice.

A) Childs have powerful sense of smell than adults

B) Adults have more sense of smell than Childs

C) Both above have equal

D) Parents have good sense of smell than their Childs


The weakest of the five senses is __________

A) Smell

B) Hearing

C) Taste

D) Sight


Taste buds for sweet taste are located _________

A) At the tip of the tongue

B) At the backside of the tongue

C) At the point of attachment

D) None of the above

E) All of the above



The taste buds for salty and sour taste lies at the ________

A) Sides of the tongue

B) Front of the tongue

C) Backside of the tongue

D) None of the above


Taste buds for bitter taste are located at the _______

A) Sides of the tongue

B) Front of the tongue

C) Backside of the tongue

D) None of the above



We have almost ______ Taste buds.

A) 100

B) 1000

C) 10,000

D) 100,000


The biggest source of energy on this planet earth is _______

A) Moon

B) Carbohydrates

C) Sun

D) Jupiter


Plant use carbon dioxide and water in photosynthesis to produce _______

A) Carbohydrates

B) Proteins

C) Lipids

D) Vitamins


Photosynthesis takes place in _______

A) Mitochondria

B) Ribosome

C) Chloroplast

D) Cell membrane


The thin green expanded portion of the leaf is _____

A) Pedicel

B) Leaf Blade

C) Midrib

D) Lamina

E) Both B and D


The cylindrical stalk of the leaf is called _______

A) Stipule

B) Petiole

C) Midrib

D) Lamina


The outer layer of cells of leaf is called ______

A) Cortex

B) Xylem

C) Phloem

D) Epidermis


Photosynthesis occur in _____

A) Epidermal cells

B) Mesophyll cells

C) Xylem

D) Phloem


During photosynthesis light energy is converted into ______

A) Mechanical energy

B) Chemical Energy

C) Electrical energy

D) Radiant energy


In the atmosphere carbon dioxide is present in amount of _____ percent

A) 0.3 to 0.4

B) 1 to 4

C) 0.5 to 1

D) 3 to 6


Suitable temperature required for photosynthesis in most plants is _____ degree centigrade.

A) 25 to 35

B) 35 to 40

C) 40 50

D) 50 to 80


In respiration ______ is broken down.

A) Oxygen

B) Water

C) Proteins

D) Glucose


_____ is celebrated as world environment day.

A) 5thMarch

B) 5thMay

C) 5thJune

D) 5thSeptember


Abiotic component of environment is ________

A) Living organisms

B) Non living

C) Include both

D) None of the above


Following are all biotic components except;

A) Producers

B) Decomposers

C) Consumers

D) Soil


Which one is incorrect about parasite?

A) Live inside or on the body of host

B) Harm the host

C) Are Useful for host

D) Obtain food from host


in mutualism ________

A) Both partners benefitted

B) One organism harm and other get benefits

C) Both harm each other

D) None of the above is incorrect


In predation ______

A) One organism kills other

B) Both organisms take benefits

C) Both are harmed

D) All above

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