Arjun appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

Chloroplast are the organelles in the cells of green plants which contain chlorophyll and where photosynthesis take place. Thus, photosynthesis occurs in the organelles called the chloroplast present in the photosynthetic cell or mesophyll cell of green plants. In the other words, the site of photosynthesis in cell of the leaf are chloroplast. Chloroplast can be seen easily by using a light microscope.

In tissues of human beings, glucose is converted into pyruvic acid in the

The first step is the break-down of glucose, a six-carbon molecule, into a three-carbon molecule called pyruvate. This process takes place in the cytoplasm.

Which of the following statements about the autotrophs is incorrect?

Because autotrophs convert carbon dioxide and water into carbohydrates in the PRESENCE of sunlight.

In which of the following groups of organisms, food material is broken down outside the body and absorbed?

Yeast, mushroom, bread mould are saprophytes who break down the food materials outside the body then absorb it.

Select the correct statement from the following.

Heterotrophs do not synthesise their own food. They feed on autotrophs for their nutrition.

If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?

Starch breaking down into sugars and later on in Stomach it further break down in glucose.

The blood leaving the tissues becomes richer in

The blood leaving the tissues becomes richer in Carbon Dioxide. Because tissues receive the oxygenated blood from arteries and used up the oxygen to take energy and release the carbon dioxide.

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

Non-living things which are not alive cannot move by themselves. For example, a stone is a non-living thing which cannot move by itself from one place to another or show any other type of movement. We will have to move it by applying force from outside.

Nancy is writing some sentences about living things. Choose the statements which do not shows the characteristics of living things:

Living things can move by themselves. The plants are fixed in the soil at a place so they cannot move like animals from place to place but the plants can only move parts of their body such as leaves, flowers, roots etc.

During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the:

Pyruvic acid is converted into lactic acid in the cytoplasm of muscles cells during deficiency of oxygen in human beings.

Priya is writing some statements, choose the correct statement and help him:

Here, all the statements are correct. Hence your answer will be option [D].

The internal (cellular) energy reserve in autotrophs is

Using the material in the form of carbon dioxide and water which is converted into carbohydrates in the presence of sunlight and chlorophyll. Carbohydrates are utilised for providing energy to the plant. The carbohydrates which are not used immediately are stored in the form of starch, which serves as the internal energy reserve to be used as and when required by the plant.

A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains

The solution turned blue-black in colour just because of starch.

In which part of the alimentary canal food is finally digested?

The digestion of food completed in Small intestine. In large intestine only absorption of water take place. In mouth cavity the digestion starts only. In stomach, the digestion of proteins start in acidic medium with the help of pepsin.

Choose the function of the pancreatic juice from the following

Trypsin digests proteins in basic medium of food (pepsin digest proteins in acidic medium) and lipase emulsified fats.

Consider the following statements and choose the correct one:

Here, all the statements are correct. Hence your answer will be option [D].

Which of the following statement is true about heart?

Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left, the left atrium. The left atrium relaxes when it is collecting this blood. It then contracts, while the next chamber, the left ventricle, relaxes, so that the blood is transferred to it. When the muscular left ventricle contracts in its turn, the blood is pumped out to the body. De-oxygenated blood comes from the body to the upper chamber on the right, the right atrium, as it relaxes. As the right atrium contracts, the corresponding lower chamber, the right ventricle, dilates. This transfers blood to the right ventricle, which in turn pumps it to the lungs for oxygenation. Since ventricles have to pump blood into various organs, they have thicker muscular walls than the atria do. Valves ensure that blood does not flow backwards when the atria or ventricles contract.

What prevents backflow of blood inside the heart during contraction?

Valves allow the flow of blood in one direction only.

The internal (cellular) energy reserve in autotrophs is

In autotrophs, the cellular energy reserve is starch. However, carbohydrates serve as a major fuel in the cells to provide energy for life processes. The sugar (glucose) produced that is not used immediately gets stored in the form of starch in plants. In animals, food is stored in the form of glycogen. These food reserves provide energy as and when required by the organisms.

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

Chloroplast are the organelles in the cells of green plants which contain chlorophyll and where photosynthesis take place. Thus, photosynthesis occurs in the organelles called the chloroplast present in the photosynthetic cell or mesophyll cell of green plants. In the other words, the site of photosynthesis in cell of the leaf are chloroplast. Chloroplast can be seen easily by using a light microscope.

Consider the following statements and choose the correct one:

Here, all the statements are correct. Hence your answer will be option [D].

Read the following sentences carefully, and choose the incorrect one:

Amoeba has no fixed place for removing the undigested part of food. When a considerable amount of undigested food collects inside Amoeba, then its cell membrane suddenly ruptures at any place and the undigested food is thrown out the body of Amoeba.

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

Pisces have only two chambers to their hearts, and the blood is pumped to the gills, is oxygenated there, and passes directly to the rest of the body. Thus, blood goes only once through the heart in the fish during one cycle of passage through the body.

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

In Pisces (fishes), the heart is 2 chambered oral pumps deoxygenated blood to the gills, where oxygenation takes place by diffusion. The oxygenated blood from the gills is supplied to the body parts where oxygen is utilised and CO2 enters it making the blood deoxygenated. This deoxygenated blood returns to the heart. Thus, it has single circulation, i.e., blood passes through the heart only once during one complete cycle.

Neha is writing some sentences about living things. Choose the statements which do not shows the characteristics of living things:

Living things can move by themselves. The plants are fixed in the soil at a place so they cannot move like animals from place to place but the plants can only move parts of their body such as leaves, flowers, roots etc.

What prevents backflow of blood inside the heart during contraction?

Valves ensure. that blood does not flow backwards when the atria or ventricles contract. Since ventricles have to pump blood into various organs with high pressure, they have thicker walls than atria. The separation of the right side and left side of heart by valve also helps to keep oxygenated and deoxygenated blood from mixing so as to supply high amount of oxygen to the body.

Vishrut appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

Non-living things which are not alive cannot move by themselves. For example, a stone is a non-living thing which cannot move by itself from one place to another or show any other type of movement. We will have to move it by applying force from outside.

Read the following sentences carefully, and choose the incorrect one:

Here, all the statements are correct. Hence your answer will be option [D].

During respiration exchange of gases take place in

It is in the alveoli in the lungs where gaseous exchange takes place. The walls of the alveoli are very thin and surrounded by network of very thin blood capillaries. The presence of millions of alveoli in the lungs provides a large area for the exchange of gases.

Class 10 Science Chapter 5 MCQ (Multiple Choice Questions)

Updated on April 26, 2023
by Tiwari Academy

Class 10 Science Chapter 5 MCQ (Multiple Choice Questions) test series of Life Processes updated for new academic session 2025-26. These questions are important for CBSE Board examination as it contains important questions from CBSE Sample Papers, Questions from Board Papers also. After going through the chapter 5 of Class 10 Science, students should practice these questions to cross check there level of preparation for exams. More MCQ Questions will be added as per need of the students.

Class 10 Science Chapter 5 MCQ for 2025-26

Class:	10
Subject:	Science
Chapter: 5	Life Processes
Contents:	MCQ Tests
Session:	CBSE 2025-26

Class 10 Science Chapter 5 MCQ Test for Revision

The following test of MCQs contains 10 questions for practice. Considering each questions as of 1 mark, attend the test. If you are getting less than 40 percent marks means, you need to go through NCERT Books once again. Doing more than 6 or more questions correctly is satisfactory.

Which is the correct sequence of parts in human alimentary canal?

[A]. Mouth → stomach → small intestine → oesophagus → large intestine.

[B]. Mouth →oesophagus → stomach → large intestine → small intestine.

[C]. Mouth → stomach → oesophagus → small intestine → large intestine.

[D]. Mouth → oesophagus → stomach → small intestine → large intestine.

Consider the following statements and choose the incorrect one:

[A]. All the plants and animals are alive all living things.

[B]. The most important Criterion to decide whether something is alive or not is the movement.

[C]. The movements in most of the animals are fast and can be observed easily but the movement in plants are usually slow and observed with difficulties.

[D]. All the above.

Lack of oxygen in muscles often leads to cramps among cricketers. This result due to

[A]. Conversion of pyruvate to ethanol

[B]. Conversion of pyruvate to glucose

[C]. Non conversion of glucose to pyruvate

[D]. Conversion of pyruvate to lactic acid

Which of the following statement is or are incorrect?

[A]. All the living organisms need energy to perform various life processes.

[B]. Energy is not required by an organism during sleep.

[C]. Food is a kind of will which provides energy to all living organisms.

[D]. Our body gets longest size in in early morning in the bed.

Which of the following statement(s) is (are) correct?

[A]. Pyruvate can be converted into ethanol and carbon dioxide by yeast, and Fermentation takes place in mitochondria.

[B]. Fermentation takes place in aerobic bacteria, and Fermentation is a form of anaerobic respiration.

[C]. Pyruvate can be converted into ethanol and carbon dioxide by yeast, and Fermentation is a form of anaerobic respiration.

[D]. Fermentation takes place in aerobic bacteria, and Fermentation takes place in mitochondria.

Choose the forms in which most plants absorb nitrogen:

[A]. Proteins, and Nitrates and Nitrites

[B]. Nitrates and Nitrites, and Urea

[C]. Urea, and Atmospheric nitrogen

[D]. Proteins, and Atmospheric nitrogen

In a science quiz competition, Saumya are asked a question where she had to choose the statement which was/were incorrect?

[A]. The green plants convert sunlight energy into chemical energy by making carbohydrates.

[B]. The food prepared by the green leaves of a plant is in the form of simple sugar called glucose.

[C]. The process by which green plants make their own food like glucose from carbon dioxide and water by using sunlight energy in the presence of chlorophyll, is called photosynthesis.

[D]. The chemical structure of glucose is C6H2O6.

Choose the event that does not occur in photosynthesis

[A]. Absorption of light energy by chlorophyll

[B]. Reduction of carbon dioxide to carbohydrates

[C]. Oxidation of carbon to carbon dioxide

[D]. Conversion of light energy to chemical energy

Rahul is writing some sentences about the process of photosynthesis. Choose the correct statements which is related to photosynthesis:

[A]. Absorption of light energy by chlorophyll.

[B]. Conversion of light energy into chemical energy and splitting of water into hydrogen and oxygen by light energy.

[C]. Reduction of carbon dioxide by hydrogen to form carbohydrate like glucose by utilising the chemical energy.

[D]. All the above.

Q10

Which of the following equations is the summary of photosynthesis?

[A]. 6CO2 + 12H2O → C6H12O6 + 6CO2 + 6H2O

[B]. 6CO2 + H2O + Sunlight → C6H12O6 + O2 + 6H2O

[C]. 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2O

[D]. 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6CO2 + 6H2O

Q11

Which of the following is an incorrect statement?

[A]. Organisms grow with time

[B]. Organisms must repair and maintain their structure

[C]. Movement of molecules does not take place among cells

[D]. Energy is essential for life processes

Q12

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The process in which the absorbed food is taken in by body cells and used for energy growth and repair is called assimilation.

[B]. The process in which the digested food passes through the intestinal wall into bloodstream is called absorption.

[C]. The process in which the food containing large in soluble molecules is broken down into small water-soluble molecules is called digestion.

[D]. None of the above.

Q13

Urvashi is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Urvashi wants to take help from you:

[A]. The contraction and expansion movement of the walls of food pipe is called systematic oesophagus movement.

[B]. Paramecium uses its hair like structure called Cilia to sweep the food particles from water and put them into its mouth.

[C]. In multicellular animals like humans, grasshoppers, fish etc. all the processes involved in nutrition are performed by a combination of digestive organs.

[D]. All the above.

Q14

Which part of alimentary canal receives bile from the liver?

[A]. Stomach

[B]. Small intestine

[C]. Large intestine

[D]. Oesophagus

Q15

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

[A]. Pepsin

[B]. Mucus

[C]. Salivary amylase

[D]. Bile

Q16

Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by

[A]. Labeo, Chameleon, Salamander.

[B]. Hippocampus, Exocoetus, Anabas.

[C]. Hyla, Rana, Draco.

[D]. Whale, Dolphin, Turtle.

Q17

Choose the event that does not occur in photosynthesis

[A]. Absorption of light energy by chlorophyll.

[B]. Reduction of carbon dioxide to carbohydrates.

[C]. Oxidation of carbon to carbon dioxide.

[D]. Conversion of light energy to chemical energy.

Q18

Oxygen liberated during photosynthesis comes from

[A]. Water

[B]. Chlorophyll

[C]. Carbon dioxide

[D]. Glucose

Q19

Choose the correct statement that describes arteries.

[A]. They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.

[B]. They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body.

[C]. They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.

[D]. They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.

Q20

Which of the following statement (s) is (are) true about heart?

[A]. Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs.

[B]. Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs.

[C]. Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs, and Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body.

[D]. Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs, and Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.

Q21

The opening and closing of the stomatal pore depends upon

[A]. Oxygen.

[B]. Temperature.

[C]. Water in guard cells.

[D]. Concentration of Carbon Dioxide in stomata.

View Answer

Q22

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

[A]. Conversion of pyruvate to ethanol.

[B]. Conversion of pyruvate to glucose.

[C]. Non conversion of glucose to pyruvate.

[D]. Conversion of pyruvate to lactic acid.

View Answer

Q23

Which is the correct sequence of air passage during inhalation?

[A]. Nostrils → Larynx → Pharynx → Trachea → Lungs

[B]. Nasal passage → Trachea → Pharynx → Larynx → Alveoli

[C]. Larynx → Nostrils → Pharynx → Lungs

[D]. Nostrils → Pharynx →Larynx → Trachea → Alveoli

View Answer

Q24

Which of the following statement is or are correct?

[A]. Each kidney is made up of a large number of excretory units called nephrons.

[B]. The best long-term solution for kidney failure is the kidney transplant.

[C]. The process used to clean the blood of a person by separating the waste substance from it, is called dialysis.

[D]. All the above.

View Answer

Q25

When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of

[A]. Oxygen

[B]. Carbon dioxide

[C]. Nitrogen

[D]. Water vapour

View Answer

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Class 10 Science Chapter 5 MCQ Tests

Class 10 Science Chapter 5 MCQ Tests are given for the practice of topic LIFE PROCESSES. The questions are picked up from NCERT Books, Some popular publisher’s books and NCERT Exemplar Problems books. These are a complete sets of questions for knowledge testing as well as preparation of CBSE Board Exams.

Are MCQs of chapter 5 important for class 10 Board exams?

As per the latest syllabus MCQs are compulsory in board exams. There will be very short questions including MCQ. It may be case study based questions or direct multiple choice questions.

Is the explanation of MCQ required in Board Exams for full score?

You may give only the correct option as answer but if you know the correct explanation, please give in brief.

What are the maximum number of MCQs in Class 10 Science Boards?

The maximum marks of MCQ depends on weightage of the chapter in class 10th science.

Download NCERT Books and Offline Apps 2025-26 based on new CBSE Syllabus. Ask your doubts related to NIOS or CBSE Board and share your knowledge with your friends and other users through Discussion Forum.

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Last Edited: April 26, 2023