Class 10 Science Chapter 6 NCERT Solution Intext & Exercise

Chapter 6 of Science Subject of Class 10 is Life Processes. NCERT Solutions (Intext and End Exercise Questions) for Science Chapter 6 are provided on this page.

Class 10 Science Chapter 6 – Life Processes

Chapter 6 of Class 10 Science NCERT Text book is “Life Processes”. The end exercise of this chapter consists of a total of 13 questions. These end exercise questions are related to life processes, functioning of heart, respiration processes in living beings like human and plants , etc

Chapter 6 : Life Processes ( NCERT Solutions )

SubjectScience
Class 10
Chapter Chapter 6 : Life Processes
Study MaterialNCERT Solutions ( End Exercise and Intext Questions )
Total Questions 13 Questions
Text BookNCERT Text Book ( Updated Syllabus)

Class 10 Science Chapter 6 Question 1 :
The kidneys in human beings are a part of the system for

(a) nutrition.
(b) respiration.
(c) excretion.
(d) transportation.

Answer : Option [ c ] “Excretion” is correct answer.

Class 10 Science Chapter 6 Question 2 :
The xylem in plants are responsible for

(a) transport of water.
(b) transport of food.
(c) transport of amino acids.
(d) transport of oxygen.

Answer : Option [ a ] “transport of water ” is correct answer.

Class 10 Science Chapter 6 Question 3 :
The autotrophic mode of nutrition requires

(a) carbon dioxide and water.
(b) chlorophyll.
(c) sunlight.
(d) all of the above.

Answer and Explanation : Option [ d ] “all of above” is correct answer.
The autotrophic mode of nutrition requires carbon dioxide , sunlight and chlorophyll.

Class 10 Science Chapter 6 Question 4 :
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

(a) cytoplasm.
(b) mitochondria.
(c) chloroplast.
(d) nucleus.

Answer : Option [ b ] “Mitochondria” is correct answer.

Class 10 Science Chapter 6 Question 5 :
What is the role of saliva in the digestion of food?

Answer :
Role of Saliva in Digestion of Food
1. The saliva contains an enzyme called salivary amylase that breaks down the starch to give sugar.
2. The saliva also moistens the food that helps in chewing and breaking down the big piece of food in to the smaller pieces.

Class 10 Science Chapter 6 Question 6 :
How are fat digested in our bodies ? Where does this process take place ?

Answer :
Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. Th pancreas also secrets lipase which helps in breaking down emulsified fats .
This process takes place in small intestine.

Class 10 Science Chapter 6 Question 7 :
What are the necessary conditions for autotrophic nutrition and what are its by-products?

Answer :
Necessary Conditions for autotrophic nutrition are Sunlight, Chlorophyll, Carbon Dioxide, Water , temperature and soil.
By products of autotrophic nutrition are oxygen , hydrogen gas (H2) Carbohydrates.

Class 10 Science Chapter 6 Question 8 :
What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration

Answer :
Difference between Aerobic and anaerobic respiration :-

Aerobic RespirationAnaerobic Respiration
Aerobic Respiration occurs in presence of oxygen , and oxygen is utilised Anaerobic Respiration take place in absence of Oxygen.
Complete breakdown of food occur in Aerobic respiration.Partial breakdown of food occurs in Anaerobic Respiration
The end products in Aerobic Respiration are CO2 and H2OThe end products in Anaerobic Respiration may be ethyl, alcohol, CO2 or lactic acid.
Aerobic Respiration produces a considerable amount of energy , due to complete oxidation of food molecules. Anaerobic Respiration produces much less energy ,due to incomplete oxidation of food.

Class 10 Science Chapter 6 9 :
How are the alveoli designed to maximise the exchange of gases?

Answer :
Alveoli have balloon-like structure which expands and relax according to the amount of gas required for respiration. These get maximised for the exchange of gases.

Class 10 Science Chapter 6 Question 10 :
What would be the consequences of a deficiency of haemoglobin in our bodies?

Answer :
The deficiency of haemoglobin in our bodies leads to lack of oxygen in the body. It is haemoglobin which is responsible for the transport of O2 .

Class 10 Science Chapter 6 Question 11 :
Describe double circulation of blood in human beings. Why is it necessary?

Answer :
in animals and humans the blood goes through the heart twice during each cycle. This is known as double circulation.
Double Circulation is necessary because in one circulation it does not fulfill the purpose of oxygenating the blood and transporting it to rest of the body.

Class 10 Science Chapter 6 Question 12 :
What are the differences between the transport of materials in xylem and phloem?

Answer :
Difference between Xylem and Phloem

XylemPhloem
Xylem transports water and minerals from root to leaves and other parts of plant.Phloem transport the prepared food and organic nutrients from leaves to other parts of the plant.
It is carries our by xylem vessels and tracheidsIt take place in sieve tubes with the help of adjacent companion cells.
The movement is generally unidirectional.The movement is multidirectional.
The transport of material is due to transpiration pull.The material moves to due to osmotic pressure.
There is expenditure of energy.This is active process and requires energy.

Class 10 Science Chapter 6 Question 13 :
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

Answer :
Difference between Alveoli in lungs and nephrons in kidneys .

AlveoliNephrons
The structure of alveoli is that of punch-like air sac.Nephrons are elongated tubules.
The walls of alveoli are very thinEach nephron has two components –
1. Bowman’s Capsule
2. Tubules.
Alveoli are filled with extensive network of thin walled blood vessels i.e. capillaries for the exchange of gasesBowman’s Capsules us supplied with a cluster of capillaries called “Glomerulus” for filtration.
The presence of millions of alveoli in the lungs provides a very larges surface of exchange of gases between blood and inhaled air.The function of tubular part of nephron is to allow th selective reabsorption of the useful substance in blood capillaries.