Class 7th Science MCQs - Home of Knowledge

Class 7th Science MCQs

Class 7th Science MCQs


  1. A soft mass of slippery food when pass through oral cavity is called …….

A) Chime

B) Bile

C) Bolus

D) All of the above

  1. Ptyalin digests ……….

A) Carbohydrates

B) Proteins

C) Lipids

D) All of the above


  1. The component of food fully digested in mouth is……

A) Proteins

B) Lipids

C) Carbohydrates

D) Lipids and Proteins


  1. After food reaches the stomach …………

A) Chime is formed is stomach

B) Bolus is formed is stomach

C) Fats are added with food

D) All of the above happened.


  1. After food reaches the stomach ………….

A) No digestion occur in stomach

B) Juices mix with the food and stomach muscle squeeze it

C) Food is completely digested and is absorbed in the blood

D) Food moves quickly to small intestine without digestion


  1. The organ which do not secrete any digestive enzyme is ……….

A) Liver

B) Stomach

C) Pancreas

D) Kidney


  1. Small intestine is …………

A) 0.5 to 1 meter long

B) 1 to 3 meter long

C) 4 to 5 meter long

D) Six to eight meter long


First part of small intestine is called _______

A) Duodenum

B) Jejunum

C) Ileum

D) Operculum


Villi are found in ________

A) Esophagus

B) Lungs

C) Intestine

D) Kidney


Duodenum is about _______ cm long

A) 10

B) 15

C) 30

D) 60



Digestive enzymes from liver and pancreas inter _______

A) Stomach

B) Kidney

C) Intestine

D) Esophagus


Waste materials is excreted through ______

A) Stomach

B) Colon

C) Anus

D) Duodenum



Water is absorbed to blood from undigested food in ______

A) Stomach

B) Liver

C) Kidney

D) Large intestine


Undigested food is stored in ______ for sometime

A) Small intestine

B) Large intestine

C) Stomach

D) Esophagus


Vitamin k is produced by ______ in large intestine.

A) Fungi

B) Virus

C) Plasmodium

D) Bacteria


Vitamin k is produced in _______

A) Stomach

B) Esophagus

C) Large intestine

D) Liver


Disease of appendix is called _____

A) Malaria

B) Appendicitis

C) Gout

D) Headache


Ptyalin helps in breakdown of _______

A) Starch

B) Lipids

C) Proteins

D) Vitamins


Ptyalin is present in ______

A) Saliva

B) Lymph

C) Blood

D) Urine



Pepsin helps in digestion of _______

A) Starch

B) Lipids

C) Proteins

D) Vitamins


Pepsin is found in _______

A) Kidney

B) Stomach

C) Esophagus

D) Liver


Liver produce _______

A) Bile

B) Ptyalin

C) Pepsin

D) Pancreatic Juice


During breathing ______ is absorbed into the blood.

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Harmful chemicals


during respiration ______ exhaled.

A) Carbon dioxide

B) Carbon monoxide

C) Oxygen

D) All of the above


All are the functions of nose except ______

A) Produce digestive enzymes

B) Warm the air

C) Make air dust free

D) Remove microbes from the air

E) Make the air moist


Sound producing organ is ______

A) Pharynx

B) Larynx

C) Trachea

D) Tongue and Teeth


Larynx is present in _______

A) Neck

B) Stomach

C) Tongue

D) Head




Trachea is connected with the pharynx through an opening called_____

A) Glottis

B) Epiglottis

C) Aperture

D) Mouth piece


Trachea divides into two ________

A) Bronchioles

B) Alveoli

C) Bronchi

D) Papillae


Thick muscular layer that separate lung from abdomen is _______

A) Pericardium

B) Plasma membrane

C) Both A and B

D) Diaphragm


Membrane of the lungs is called ______

A) Pleural membrane

B) Pericardium

C) Diaphragm

D) Epiglottis


Organism responsible for pneumonia is _______

A) Plasmodium

B) Virus

C) Streptococcus

D) Mycoplasma


Mycobacterium cause ______

A) Heart failure

B) Tuberculosis

C) Skin Cancer

D) Mouth and foot disease


_____ people infected by TB

A) Two billion or one third of world population

B) 4 billion

C) 0.5 billion

D) 0.25 billion


Cigarette smoke contain _______

A) 40 Chemicals

B) More than 4000 chemicals

C) Less than 100 and more than 50 chemicals

D) 200,000 Chemicals



Another name of the trachea is ______

A) Larynx

B) Pharynx

C) Bronchus

D) Trachea


It protect the lung from outside harm

A) Cartilage

B) Alveoli

C) Rib cage

D) Bronchus


Which of the following organs does not produce digestive enzymes?

A) Kidney

B) Liver

C) Stomach

D) Pancreas


The system composed of blood, vessels and heart is called_______

A) Digestive

B) Circulatory

C) Enzymatic

D) Respiratory


It is not the function of heart

A) Exchange of gases

B) Transport of gases

C) Keeps beating throughout life

D) Pumps oxygenated blood to body


Speed of blood is faster when it reaches ______

A) Kidneys

B) Capillaries

C) Aorta

D) Auricle


The membrane of heart is called _____

A) Diaphragm

B) Pleural membrane

C) Plasma membrane

D) Pericardium



The means of food transport for the body cells is _____

A) Blood

B) Oxygen

C) Carbon dioxide

D) Brain


If the walls of the heart of a person become defected, how it can be diagnosed?

A) By taking X-Ray

B) By Echocardiogram

C) By Lithotripsy

D) By simple ultrasound


Thin walled chambers of heart are called _____

A) Auricles

B) Ventricles

C) Arteries

D) Veins



Thick walled chambers of heart are called ____

A) Auricles

B) Ventricles

C) Arteries

D) Veins


The largest artery is called _______

A) Vena cava

B) Superior vena cava

C) Aorta

D) Pulmonary artery



Which one is incorrect about right atrium?

A) Receive blood from body

B) Receive deoxygenated blood

C) Supply blood to right ventricle through tricuspid valve

D) Supply blood to right ventricle through Bicuspid valve


From right ventricle blood is pumped to ______

A) Whole body

B) To lungs

C) Again to atrium

D) None of the above


Blood come back to heart from lungs through ______

A) Iliac vein

B) Pulmonary vein

C) Pulmonary artery

D) Aorta


Through bicuspid valve blood is pumped from left atrium to ______

A) Body

B) Lungs

C) Left ventricle

D) Right ventricle


Food in plants is transported through _____

A) Phloem

B) Xylem

C) Cortex

D) Epidermis



Water in plants is transported through _____

A) Xylem

B) Phloem

C) Cortex

D) Stomata


Which one is true about pollen grain?

A) Pollen grain is produced by carpel

B) Pollen grain fuses with the seed during fertilization

C) When pollen grain reaches the stigma of flower of the same species a pollen tube is formed

D) The pollen grain is also needed for asexual reproduction



Part the flower that protect flower in bud condition is _____

A) Gynoecium

B) Androecium

C) Carpel

D) Calyx


Whorl of calyx contain leaf like structures called ______

A) Petals

B) Sepals

C) Carpels

D) Stamens


Male reproductive part of the flower is _______

A) Gynoecium

B) Androecium

C) Carpel

D) Calyx


The correct statement about pollination is/are

A) It occurs in flowering plants

B) Pollen grain reaches the stigma of another flower or same flower

C) Insects and wind help in pollination

D) All above are correct statements


The zygote is formed inside the ______

A) Ovary

B) Stigma

C) Anther

D) Pollen grain


A honey bee with hundreds of pollens stuck to its legs visit a flower but fertilization does not takes place. The probable answer may be _____

A) Plant is not mature

B) Plant has not been watered properly

C) Flower is not of the same species

D) Pollen grains are not mature



A plant growing on the side of a pond bearing bright red flowers. It may be pollinated by ____

A) Water

B) Insects

C) Wind

D) Rain


There are 200,000 varieties of pollinators. Most of which are ______

A) Bacteria

B) Insects

C) Humans

D) Mammalia


Water dwelling plants like water weed, Eel grass and hydrilla pollinate through

A) Insects

B) Water

C) Wind

D) None of the above


The study of relationships of living organisms with each other and their environment is called ____

A) Ecology

B) Physiology

C) Anatomy

D) Etymology


The animals active at day time are called _____

A) Diurnal

B) Nocturnal

C) Day lover

D) All of the above


Specific living place of an organism is called _____

A) Habitat

B) Environment

C) Ecosystem

D) Species


In an ecosystem the energy flow takes place in this way _____

A) Sunlight, Producers, Decomposers, Consumers

B) Sunlight, Consumers, Decomposers, Producers

C) Sunlight, Decomposers, Consumers, Producers

D) Sunlight, Producers, Consumers, Decomposers


In winter most of the cold blooded animals disappear because _______

A) They all migrate to warm areas like deserts

B) They either die or hibernate to avoid cold

C) They are eaten by warm blooded animals.

D) They sit on their eggs to keep them warm for hatching


Many food chains unite to form a ______

A) Food web

B) Food pyramid

C) Mega food chain

D) Food cycle


Arrange the following to make a food chain.

i)  Fox   ii)  Owl   iii)  Mouse   iv)  Grain of rice

A) iv, iii, ii, i

B) iii, iv, ii, i

C)I, ii, iii, iv

D) ii, iii, I, iv

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