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.

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.

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.

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.

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.

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.

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

Lime water turns milky due to presence of carbon dioxide. The reaction of lime water and carbon dioxide forms calcium carbonate which is insoluble in water and makes lime water milky.

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 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.

The opening and closing of the stomatal pore depends upon

The opening and closing of the pore is a function of the guard cells. The guard cells swell when water flows into them, causing the stomatal pore to open. Similarly the pore closes if the guard cells shrink.

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.

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

When we eat something a fluid called saliva secreted by the salivary glands. The saliva contains an enzyme called salivary amylase that breaks down starch which is a complex molecule to give simple sugar.

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

When there is a lack of oxygen in our muscle cells, another pathway for the break-down of pyruvate is taken. Here the pyruvate is converted into lactic acid which is also a three-carbon molecule. This build-up of lactic acid in our muscles during sudden activity causes cramps.

Class 10 Science Chapter 6 MCQ

Class 10 Science Chapter 6 MCQ (Multiple Choice Questions) test series of Life Processes updated for new academic session 2020-21. 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 6 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 2020-21

Class:	10
Subject:	Science
Contents:	MCQ Tests

Class 10 Science Chapter 6 MCQ Test for Revision

The following test of MCQs contains 5 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 3 or more questions correctly is satisfactory.

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

[A]. Mushroom, green plants, Amoeba.

[B]. Yeast, mushroom, bread mould.

[C]. Paramecium, Amoeba, Cuscuta.

[D]. Cuscuta, lice, tapeworm.

Choose the function of the pancreatic juice from the following

[A]. trypsin digests proteins and lipase carbohydrates.

[B]. trypsin digests emulsified fats and lipase proteins.

[C]. trypsin and lipase digest fats.

[D]. trypsin digests proteins and lipase emulsified fats.

During respiration exchange of gases take place in

[A]. Trachea and larynx

[B]. Alveoli of lungs

[C]. Alveoli and throat

[D]. Throat and larynx

Oxygen liberated during photosynthesis comes from

[A]. Water

[B]. Chlorophyll

[C]. Carbon dioxide

[D]. Glucose

View Answer

Which of the following statement is correct?

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

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

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

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

View Answer

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.

Download NCERT Books and Offline Apps 2020-21 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.

Class 10 Science Chapter 6 MCQ

Class 10 Science Chapter 6 MCQ for 2020-21

Class 10 Science Chapter 6 MCQ Test for Revision

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

Choose the function of the pancreatic juice from the following

During respiration exchange of gases take place in

Oxygen liberated during photosynthesis comes from

Which of the following statement is correct?

Class 10 Science Chapter 6 MCQ Tests

Are MCQs important for class 10 Board exams?

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

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

What are the marks of each MCQ?

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Class 10 Science Chapter 6 MCQ

Class 10 Science Chapter 6 MCQ for 2020-21

Class 10 Science Chapter 6 MCQ Test for Revision

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

Choose the function of the pancreatic juice from the following

During respiration exchange of gases take place in

Oxygen liberated during photosynthesis comes from

Which of the following statement is correct?

Class 10 Science Chapter 6 MCQ Tests

Are MCQs important for class 10 Board exams?

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

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

What are the marks of each MCQ?

NCERT Solutions

High School

Quick Links

Help & Support