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

The various organs in sequence of mouth, oesophagus, stomach, small intestine and large intestine and anus. The nutrition in human beings take place through the digestive system, that consists of alimentary canal and associated glands.

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.

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.

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

Food comes first in Mouth and then moves through Oesophagus and stomach → small intestine → large intestine.

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.

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.

Which of the following statement is or are correct?

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

Which of the following statement is or are incorrect?

Energy is required by an organism even during sleep because when we are asleep a number of biological processes keep on occurring in the body which require energy. Our heart beats non-stop even when we are asleep to pump blood throughout the body. And this beating of heart requires energy. Thus, the working of heart requires are continuous supply of energy.

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].

Which of the following is an incorrect statement?

Cells generally does not share the transaction of the particles or molecules.

Which part of alimentary canal receives bile from the liver?

The small intestine is the site of the complete digestion of carbohydrates, proteins and fats. It receives Bile juice, the secretions of the liver and also pancreatic juice from pancreas for this purpose.

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.

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

Organisms which can make their own food from carbon dioxide and water are called autotrophs. Carbon dioxide and water are inorganic substance. So, we can say that, those organisms which can make their own food from the inorganic substances present in the environment are called autotrophs. All the green plants are autotrophs.

Choose the forms in which most plants absorb nitrogen:

Nitrogen is an essential element used in the synthesis of proteins and other compounds. This is taken up in the form of inorganic nitrates or nitrites. Sometimes it is taken up as organic compounds i.e., urea, which have been prepared by bacteria from atmospheric nitrogen.

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

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

Which of the following statement is or are correct?

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.

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

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

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:

The oesophagus carries food to the stomach. When the slightly digested food enters the food pipe, the walls of food pipe start contraction and expansion movements. The contraction and expansion movement of the walls of food pipe is called peristaltic movement. This peristaltic movement of food pipe pushes the slightly digested food into the stomach.

Which part of alimentary canal receives bile from the liver?

Small intestine receives bile from the liver which is normally stored in the gall bladder. It performs two functions i.e. makes the food alkaline and break the fats present in food into small globules by the process of emulsification.

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.

Choose the correct statement that describes arteries.

Since the blood emerges from the heart under high pressure, the arteries have thick, elastic walls.

Choose the correct statement that describes arteries.

Arteries are the vessels which carry blood away from the heart to various organs of the body. Since the blood emerges from the heart under high pressure, the arteries have thick, elastic walls. Veins collect the blood from different organs and bring it back to the heart. They do not thick walls because the blood is no longer under pressure, instead they have valves that ensure that the blood flows in only one direction.

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.

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

Single circulation is found in fishes. Hippocampus, Exoceotus, Anabas exhibit single circulation of blood because these animals belong to Pisces.

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.

Class 10 Science Chapter 5 MCQ (Multiple Choice Questions)

Updated by Rakesh
on April 26, 2023, 6:22 AM

Class 10 Science Chapter 5 MCQ (Multiple Choice Questions) test series of Life Processes updated for new academic session 2023-24. 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 2023-24

Class:	10
Subject:	Science
Chapter: 5	Life Processes
Contents:	MCQ Tests
Session:	CBSE 2023-24

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 of the following statements about the autotrophs is incorrect?

[A]. They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.

[B]. They store carbohydrates in the form of starch.

[C]. They convert carbon dioxide and water into carbohydrates in the absence of sunlight.

[D]. They constitute the first trophic level in food chains.

Which of the following statements about the autotrophs is incorrect?

[A]. They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.

[B]. They store carbohydrates in the form of starch.

[C]. They convert carbon dioxide and water into carbohydrates in the absence of sunlight.

[D]. They constitute the first trophic level in food chains.

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.

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

[A]. Cytoplasm

[B]. Chloroplast

[C]. Mitochondria

[D]. Golgi body

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.

The internal (cellular) energy reserve in autotrophs is

[A]. Glycogen

[B]. Protein

[C]. Starch

[D]. Fatty acid

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

[A]. Stomach.

[B]. Mouth cavity.

[C]. Large intestine.

[D]. Small intestine.

Consider the following statements and choose the correct one:

[A]. The holozoic nutrition is that nutrition in which an organism takes the complex organic food materials into its body by the process of ingestion, the ingested food is digested and then absorbed into the body cells of the organism.

[B]. The parasitic nutrition is that a nutrition in which an organism derives its food from the body of another living organisms without killing it.

[C]. Saprotrophic nutrition is that nutrition in which an organism obtains its food from decaying organic matter of dead plants, dead animals and rotten bread etc.

[D]. All the above.

The opening and closing of the stomatal pore depends upon

[A]. Oxygen

[B]. Temperature

[C]. Water in guard cells

[D]. Concentration of CO2 in stomata

Q10

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.

Q11

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

Q12

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

[A]. The aquatic plants use the carbon dioxide gas dissolved in water for carry out photosynthesis.

[B]. The water required by the plants for photosynthesis is absorbed by the roots of the plants from the soil through the process of osmosis.

[C]. The plants also need materials like nitrogen, phosphorus, iron and magnesium.

[D]. The site of photosynthesis in a cell of a leaf are chromoplast.

Q13

Consider the following statements and choose the correct one:

[A]. Those animals which eat only plants are called Herbivores.

[B]. Those animals which eat only other animals as food are called Carnivores.

[C]. Those animals which eat both, plants and animals are called Omnivores

[D]. All the above.

Q14

The blood leaving the tissues becomes richer in

[A]. Carbon dioxide

[B]. Water

[C]. Haemoglobin

[D]. Oxygen

Q15

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

[A]. The process of obtaining food by Amoeba is called phagocytosis.

[B]. The digested food present in the food vacuole of Amoeba is absorbed directly into the cytoplasm of amoeba cell by diffusion.

[C]. Amoeba has fixed place for removing the undigested part of food.

[D]. A part of the food absorbed in Amoeba cell is used to obtain energy through respiration.

Q16

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.

Q17

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

[A]. Animals can move from one place to another or they can move their body parts.

[B]. The plants can only move parts of their body such as leaves, flowers, shoots and roots.

[C]. Non-living things which are not alive they also move by themselves.

[D]. The movement over very small-scale organisms are invisible to the naked eyes.

Q18

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.

Q19

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

[A]. An aerobic respiration take place in our muscles during vigorous physical exercise when oxygen gets used up faster in the muscles cells.

[B]. The accumulation of lactic acid in the muscles cause muscle cramps.

[C]. We can get relief from cramps in muscles caused by heavy exercise by taking a hot water bath or a message.

[D]. None of the above.

Q20

During respiration exchange of gases take place in

[A]. Trachea and larynx

[B]. Alveoli of lungs

[C]. Alveoli and throat

[D]. Throat and larynx

Q21

Which of the following is most appropriate for aerobic respiration?

[A]. Glucose (in mitochondria) → Pyruvate (in cytoplasm) → CO2 + H2O + Energy

[B]. Glucose (in cytoplasm) → Pyruvate (in mitochondria) → CO2 + H2O + Energy

[C]. Glucose (in cytoplasm) → Pyruvate + Energy (in mitochondria) → CO2 + H2O

[D]. Glucose (in cytoplasm) → Pyruvate + Energy (in mitochondria) → CO2 + H2O + Energy

View Answer

Q22

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

Q23

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.

View Answer

Q24

Read the following sentences carefully, and choose the incorrect one(s):

[A]. The maximum pressure at which the blood leaves the heart through the main artery during contraction phase is called the systolic pressure.

[B]. The minimum pressure in the arteries during the relaxation phase of heart is called the diastolic pressure.

[C]. Blood pressure is measured by using an instrument called sphygmomanometer.

[D]. The normal blood pressure usually written as 80 upon 120

View Answer

Q25

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

[A]. Complex proteins

[B]. Simple proteins

[C]. Fats

[D]. Starch

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 2023-24 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