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

Leave a Comment

Your email address will not be published. Required fields are marked *