Life Processes Class 10 Science Chapter 6 Practice Questions

Chapter 06 of Science Subject of Class 10 is “Life Processes”. Practice Questions [ Extra Questions ] for Life processes Class 10 Science Chapter 06 are provided on this page.

Class 10 Science Chapter 6 : Life Processes

These questions covers the majority of topics of the Life Processes class 10 science chapter 6 like – Nutrients, Nutrition, Digestion, Ingestion, Egestion, Digestive System, etc.

Chapter 06 : Life Processes ( Practice Questions )

Class Class X
Chapter Chapter 6 : Life Processes
Study MaterialPractice Questions ( Extra Question for Practice )
Total Questions 49 Questions
Text BookNCERT Text Book

Practice Question of Life Processes Class 10 Science Chapter 6 (Extra Question Answer )

Ques. 1 : What are Nutrients ?
Answer : Nutrients are inorganic as well as organic substances which the organisms obtain from surroundings and use them as energy.

Ques. 2 : What is Nutrition ?
Answer : Nutrition is the process of intake nutrients and its utilization by an organism in various biological activities.

Ques. 3 : What are the various modes of nutrition ?
Answer : Various Mode of Nutrition are –

  • Autotrophic Nutrition
  • Heterotrophic Nutrition
    • Saprophytic : These are those organisms which obtain their food by dead and decaying matter .
    • Parasitic : These are those organism which feed on other living organism . Example : lice
    • Holozoic

Ques. 4 : Define Digestion .
Answer : The process in which the food containing large, insoluble molecule is broken into small soluble molecule is known as digestion .

Ques. 5 : Define Ingestion .
Answer : Ingestion is defined the intaking of food into the body .

Ques. 6 : Define Absorption.
Answer : Absorption is a process in which the digested food passes through intestinal wall into blood stream.

Ques. 7 : Define Assimilation
Answer : The process in which the absorbed food is taken in by body cells and is used for energy is known as Assimilation.

Ques. 8 : Define Egestion.
Answer : Egestion is the process in which undigested food is removed from the body.

Ques. 9 : What is Digestive System ?
Answer : The combination of Digestive organs is known as Digestive System.

Ques. 10 : Name the Organs of Digestive System
Answer : The organs of digestive system are –

  • Mouth
  • Oesophagus
  • Stomach
  • Small Intestine
  • Large Intestine

Ques. 11 : Name the complex molecule present in our food.
Answer : Complex molecules present in our food are – Carbohydrates, fats and Proteins.

Ques. 12 : Where does the digestion starts ?
Answer : The digestion starts on mouth ( Buccal Cavity )

Ques. 13 : Name the enzyme present in Saliva .
Answer : The enzyme present in Saliva is “Salivary Emylase “

Ques. 14 : What is the function of Salivary Glands ?
Answer : Salivary Glands helps in chemical digestion by secreting enzymes.

Ques. 15 : Name the secretion secreted by inner lining of stomach.
Answer : Gastric Juice.

Ques. 16 : Write the names and functions of three components of Gastric Juice.
Answer : The components of Gastric Juice are –

  • HCl : It makes the medium acidic.
  • Mucus : It Protect inner walls of stomach.
  • Pepsin : The function of Pepsin is digestion of protein.
  • Gastric Lipase : It helps in breakdown of fats.

Ques. 17 : Name the secretion which meet s the food Duodenum. Also write its function.
Answer : Bile Juice.
Functions of Bile Juice –

  • Bile Juice makes the food alkaline.
  • Bile Juice breaks the larges fat molecules into smaller molecules.

Ques. 18 : Name the gland which secrets the Bile Juice .
Answer : Liver secrets the Bile Juice.

Ques. 19 : What is Emulsification ?
Answer : The process of breaking of large molecules into smaller molecules is known as Emulsification.

Ques. 20 : What is succus entericus ?
Answer : Succus Entericus secrets intestinal juice. It is the inner lining of small intestine. It consists of three enzymes : – Lipolytic Enzymes, Proteolytic and Amylolytic Enzymes.

Ques. 21 : What are villi ?
Answer : The inner lining of small intestine has numerous finger-like projection. These finger like projections are known as villi. The function of villi is to increase the surface area for absorption. The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body.

Ques. 22 : What is Excretion ?
Answer : Excretion is the process of removal of metabolic waste from the body.

Ques. 23 : Name the various metabolic waste which are formed in our cells.
Answer : CO2 : Removed by respiratory system
Nitrogenous Waste : Removed by excretery system

Ques. 24 : Write the Location of Kidney.
Answer : In the abdomen.

Ques. 25 : From where the urine is produced ?
Answer : Urine is produced from blood by its filteration.

Ques. 26 : What is Nephron ?
Answer : Nephrons are numerous filtration units present in Kidney. It is the main functional unit that filter the blood and removes the waste.

Ques. 27 : Name the harmful nitrogenous waste present in blood .
Answer : Harmful nitrogenous waste present in the blood are urea and uric acid.

Ques. 28 : Name the two parts of Nephron.
Answer : Two parts of nephron are –

  • Bowman’s Capsule
  • Tubule [ Proximal and Distal end of Tubule ]

Ques. 29 : What is Glomerulus ?
Answer : The bunch of capillaries which is formed inside the bowman’s capsule.

Ques. 30 : What is the Initial filtrate? What are its contents ?
Answer : The urine as a filtrate in the Bowman’s capsule is called Initial Filtrate. Contents of Initial Filtrate are – Water, Urea, Amino Acid, Salts, Glucose ,etc.

Ques. 31 : What are the waste products in plants ?
Answer : O2, H2O, CO2, Resins , Gumps and Oil Wask. Excess water is removed by diffusion in plants

Ques. 32 : Pancreatic Juice is secreted by which gland ?
Answer :

Ques. 33 : What is Salivary Amylase ?
Answer : Salivary Amylase is an enzyme present in saliva that breaks down starch which is complex molecule to give sugar.

Ques. 34 : What is Buccal Cavity ?
Answer : Mouth guarded by two soft movable lips and opens into a chamber or cavity known as Buccal Cavity

Ques. 35 : What is Saliva ?
Answer : It is fluid which is secreted by salivary gland.

Ques. 36 : Name the site of complete Digestion .
Answer : Small Intestine

Ques. 37 : What is Respiration ?
Answer : Respiration is the process of oxidation of food in the cells.

Ques. 38 : What is ATP ?
Answer : ATP stands for Adenosine Tri Phosphate. It acts a cashier of energy.

Ques. 39 : What does blood transport in our body ?
Answer : Blood transport food, CO2 and Waste material in our body.

Ques. 40 : Why heart has four chamber.
Answer : Heart have four chambers to prevent the oxygen rich blood from mixing with blood containing CO2

Ques. 41 : What is double Circulation ?
Answer : In animals and human beings, the blood goes through heart twice during each cycle. This is known as Double Circulation.

Ques. 42 : What is the function of Platelets ?
Answer : Platelets avoid the loss of blood by clotting.

Ques. 43 : Write the difference between Artery and Vein .
Answer : Difference between Artery and Vein are –

It contains oxygenated blood .It contains de-oxygenated blood.
It carry blood from heart to various body partsIt carry blood from various body parts to heart
They have thick wallsThey have thin walls
Artery don’t have one way valveThey have one way valve
Blood flows under pressure/jerksBlood flow without pressure/jerks

Ques. 44 : What is scientific meaning of Respiration ?
Answer :
It is a complex process involving gaseous exchange and breakdown of simple food inn order to release energy inside cells.

Ques. 45 : Where does the breaking of pyruvate using oxygen takes place ?
Answer : The breaking of pyruvate using oxygen takes place in the mitochondria.

Ques. 46 : Write a short note on Breathing.
Answer : In human beings , the air is taken into the body through nostrils. The air passing through the nostrils is filtered by the fine hairs that line the passage so that the air going into body is free of dust and other impurities.

The passage is also lined with mucus which helps in the process. From here, the air passes through the throat into lungs. Rings of cartilage are present in the throat. These ensures that air- passage does not collapse.

Within the lungs, the passage divides into smaller and smaller tubes which finally terminates in a balloon like structure which are called alveoli.

The alveoli provide a surface where the exchange of gases take place. The walls of blood vessels contain an extensive network of blood vessels.

Ques. 47 : Write about Aerobic and Anaerobic respiration.
Answer : Aerobic Respiration : Aerobic respiration occur in presence of oxygen and oxygen is utilised. Complete breakdown of food occur in it. The end product are carbon dioxide and water. It produces a considerable amount of food molecules.

Anaerobic respiration : It takes place in absence of oxygen. Partial breakdown of food occurs in it. The end products may be ethyl alcohol, carbon dioxide or lactic acid. Much less energy is produces due to incomplete oxidation of food.

Ques. 48 : What is the role of liver in human beings ?
Answer : Role of Liver in Human Beings –

  • It secrets bile juice which make the medium of food alkaline and also emulsifies fat.
  • It stores the excess of glucose in the form of glycogen.
  • Old worn-out RBCs are broken down in liver cells . Their haemoglobin is changed into bile pigments

Ques. 49 : Write the difference between Breathing and Respiration .
Answer : Difference between Breathing and Respiration –

The process of obtaining oxygen and releasing carbon dioxide is known as breathingThe process of releasing energy from food is called respiration.
It is a physical processIt is a biochemical process
It takes place in the lungsIt takes place in the lungs as well as mitochondria

Life Processes FAQs

Q. Define Egestion

Ans. Egestion is the process in which undigested food is removed from the body.