Class 10 Science Chapter 6 MCQ (Multiple Choice Questions) test series of Life Processes updated for new academic session 2022-23. 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 6 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 6 MCQ for 2022-23

Class:10
Subject:Science
Contents:MCQ Tests

Class 10 Science Chapter 6 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.

Q1

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
Q2

Arjun 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.
Q3

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.
Q4

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
Q5

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.
Q6

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

[A]. Stomach.
[B]. Mouth cavity.
[C]. Large intestine.
[D]. Small intestine.
Q7

Which is the first enzyme to mix with food in the digestive tract?

[A]. Pepsin
[B]. Cellulase
[C]. Amylase
[D]. Trypsin
Q8

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.
Q9

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
Q10

Which of the following statement is or are correct?

[A]. There are a large number of tiny pores called stomata on the surface of the leaves of plants.
[B]. When the plant does not need carbon dioxide and want to conserve water the stomatal pores are closed.
[C]. The stomata are also present in the green stems of a plant.
[D]. All the above.
Q11

Which of the following statement is 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.. 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.. Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.
Q12

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
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

Which part of alimentary canal receives bile from the liver?

[A]. Stomach
[B]. Small intestine
[C]. Large intestine
[D]. Oesophagus
Q15

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

[A]. Proteins breaking down into amino acids
[B]. Starch breaking down into sugars
[C]. Fats breaking down into fatty acids and glycerol
[D]. Absorption of vitamins
Q16

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

[A]. Pisces and amphibians.
[B]. Amphibians and reptiles.
[C]. Amphibians only.
[D]. Pisces only.
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

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

[A]. Pisces and amphibians
[B]. Amphibians and reptiles
[C]. Amphibians only
[D]. Pisces only
Q19

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
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.
Q22

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

[A]. During inhalation, ribs move inward and diaphragm is raised, and Alveoli increase surface area for exchange of gases.
[B]. In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air, and Haemoglobin has greater affinity for carbon dioxide than oxygen.
[C]. During inhalation, ribs move inward and diaphragm is raised, and Haemoglobin has greater affinity for carbon dioxide than oxygen.
[D]. In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air, and Alveoli increase surface area for exchange of gases.
Q23

Vikas is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. Tooth enamel is the hardest material in our body.
[B]. The formation of small cavities or holes in the teeth due to the action of acid forming bacteria and improper “Dental Care” is called dental caries.
[C]. If the teeth are not cleaned regularly, they become covered with sticky yellow is layer of food particles and bacteria cells called dental plaque.
[D]. All the above.
Q24

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
Q25

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

[A]. Stomach
[B]. Mouth cavity
[C]. Small intestine
[D]. Large intestine
Class 10 Science Chapter 6 MCQ Tests

Class 10 Science Chapter 6 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 important for class 10 Board exams?

From 2019-20, MCQs are compulsory in board exams. There will be 20 marks for very short questions including MCQ, Fill in the blanks, etc.

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?

There may be maximum of 20 MCQs in Class 10 Science Examination.

What are the marks of each MCQ?

Generally, each MCQ consists of 1 mark only.

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