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) 1^st

B) 2^nd

C) 3^rd

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) 5^thMarch

B) 5^thMay

C) 5^thJune

D) 5^thSeptember

 

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