Life Processes
CBSE Class 10 Science Important Questions  /  Life Processes

Class 10 Science Chapter 5
Life Processes
Important Questions

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Here are some critical Chapter 5 Life Processes problems for Class 10 Science. These inquiries are intended to aid students in studying for and performing well on the CBSE Class 10 Science Examination 2023–24. Students can clear up their concerns and be ready for the exams by practising different types of questions. By answering these questions, you'll increase your confidence while also sharpening your problem-solving abilities.


Chapter 5 of Class 10 Science, "Life Processes," delves into the fundamental characteristics of living organisms, encapsulating concepts such as nutrition, respiration, transportation, and excretion. This chapter enables students to understand the intricate mechanisms that sustain life and contribute to the functioning of organisms. By comprehending these processes, students gain insight into the remarkable complexity of life and its essential functions

cbse class 10 Science Life Processes important questions and answers

Class 10 Life Processes Important Questions and Answers

Q 1. The kidneys in human beings are a part of the system for :


(a) Nutrition
(b) Respiration
(c) Excretion
(d) Transportation

Ans. (c)

Kidneys are the bean shaped reddish brown paired organs in human beings. These are a part of the excretory system that helps in the process of urine formation. Thus kidneys help in excretion.

Q 2. The inner lining of the stomach is protected by one of the following from hydrochloric acid. Choose the correct One:


(a) Mucus
(b) Salivary amylase
(c) Pepsin
(d) Bile

Ans. (a)

Mucus is a thick fluid secreted by the inner lining of the stomach . It protects the lining of the stomach from gastric juice. i.e hydrochloric acid . Mucous itself protects the mucous membrane of the stomach from auto-digestion.

Q 3. Why do we perform the iodine test?

Iodine test is performed to test the presence of starch in the leaves . If photosynthesis has occurred, then leaves would have the presence of strach.

Q4. How do the guard cells regulate opening and closing of stomatal pores?

Guard cells are kidney shaped cells which contain thicker inner walls and thin outer walls. During day time they perform photosynthesis due to the presence of chloroplasts in them. Due to increase in solute concentration inside the guard cells, water from subsidiary cells rushes inside by osmosis process as a result guard cells swell up. The thin outer wall bulges out and the thick inner wall is pulled inside thus stomata opens. During night time reverse happens, water rushes out from the guard cells and they become flaccid closing the stomatal pore. Thus turgor pressure of guard cells helps in closing and opening of stomata.

cbse class 10 Science Life Processes important questions and answers

Q 5. How is food transported in plants?

The transport of food from the leaves to the other parts of the plant is called translocation. Food is transported in plants through phloem. Phloem has sieve tubes which are the living cells. Sieve tubes are connected to each other by sieve plates which have small holes in them and which allows the food in solution form to pass through them. Interconnected phloem tubes are present in all parts of the plant so food is carried from leaves to all the parts of the plant. The translocation process requires energy in the form of ATP. The glucose which is made in leaves is loaded into sieve tubes of phloem tissue by using ATP, water enters into this tissue by osmosis now high pressure is created which helps in movement of food to low pressure region.

cbse class 10 Science Life Processes important questions and answerscbse class 10 Science Life Processes important questions and answerscbse class 10 Science Life Processes important questions and answers

CBSE Class 10 Science Chapter wise Important Questions

Chapter No. Chapter Name
Chapter 1 Chemical Reactions and Equations
Chapter 2 Acid, Bases and Salts
Chapter 3 Metals and Non-Metals
Chapter 4 Carbon and its Compounds
Chapter 5 Life Processes
Chapter 6 Control and Coordination
Chapter 7 How do Organisms Reproduce
Chapter 8 Heredity
Chapter 9 Light : Reflection and Refraction
Chapter 10 The Human Eye and the Colourful world
Chapter 11 Electricity
Chapter 12 Magnetic Effects of Electric Current
Chapter 13 Our Environment

Conclusion offers a thorough set of questions for learning the topic in a better way if you're looking to further practise and improve your grasp of the concepts covered in the chapter.

Frequently Asked Questions

Q1:  What do you understand about life processes?

Ans: The basic important activities performed by an organism to withstand life are called life processes. These help an organism in maintenance and survival.

Q2: What are the different life processes in human beings?

Ans: The different life processes in human beings include-nutrition, respiration, digestion, excretion, reproduction, metabolism and transportation. These processes are very important to carry out regular life activities.

Q3: Which life processes can be observed in plants?

Ans: The life processes carried out in plants are slightly different from those observed in animals. The life processes in plants include- nutrition, transportation, excretion, respiration, reproduction, sensitivity and growth.

Q4: What is the importance of life processes?

Ans: Life processes are important to carry out daily life activities. They help to produce energy and maintain homeostasis in the body. The life processes help a body survive with the changes in the environment. A slight disturbance in any of the life processes disturbs the entire functioning of the body.

Q5: What are the common life processes in both plants and animals?

Ans: The common life processes in plants and animals include- respiration, growth, nutrition, transportation, reproduction and excretion. These are carried out by all the plants and animals, digestion being an exception.

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