Cellulose rich food substances are good sources of roughage in human being because

Human beings do not have cellulose digesting enzymes called “cellulase” but cellulose is still a very important part of human diet. It forms a major part of roughage that is essential for proper digestion.

Which is the largest gland in the human body?

The liver is a reddish-brown gland situated in the upper part of the abdomen on the right side. It is the largest gland in the body. It secretes bile juice that is stored in a sac called the gall bladder.

In which of the statements is or are incorrect, about eating habits of animals?

Animals that obtain their food by killing other animals, called carnivorous and animals which feed on the remains of dead animals preyed by predators, called scavengers.

Most of the animals take food in the form of solids and this process of nutrition is called

Holozoic nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. It includes taking in the complex substances and converting them into simpler forms. Example, proteins can be broken into amino acids.

Read the sentence which is related to digestive system and choose the word for it. “Transport of digested and soluble food from the intestine to blood vessels”.

The lower part of the small intestine where the intestinal juice completes the digestion of all components of the food. The digested food can now pass into the blood vessels in the wall of the intestine. This process is called “Absorption”.

The false feet of “Amoeba” are used for

The false feet or pseudopodia of “Amoeba” are finger-like projections that allow movement (keep on appearing and disappearing as it moves) and help to catch food particles from the surroundings.

Digestion of food starts in which parts of our digestive system?

When we see, smell, taste, or even imagine a tasty meal. Our salivary glands in front of the ear, under the tongue and secretes saliva. Digestion begins in the mouth with the secretion of saliva and its digestive enzymes. Food is formed into a bolus (small amount of chewed food) by the mechanical mastication and swallowed into the esophagus from where it enters the stomach through the action of

The enzymes present in the saliva convert

The salivary gland present in mouth secretes saliva. It contains the enzyme amylase (ptyalin) that breaks down into simple sugars. Only about 30% starch digestion takes place in the mouth.

In which of the following statement is or are incorrect?

Digestion of carbohydrate like starch begins in the buccal cavity and the digestion of protein starts in the stomach.

Paheli wants to know the name of the teeth, which helps to “piercing and tearing” the food?

The canines are situated at the 'corners' of the dental arches. They have a sharp, pointed biting surface. Their function is to grip and tear food. There are four canine teeth.

Curd is the name given to the food of ruminants which is

The partially digested food in the rumen (part of stomach) of ruminants (e.g. cow, goat sheep etc.) is called cud. It is brought back to the mouth in small amounts to be chewed thoroughly.

The pancreatic juice which is secreted by pancreas, it acts on

Pancreatic juice is a liquid secreted by the pancreas, which contains a variety of enzymes. The pancreatic juice which helps the digestion of starch, called pancreatic amylase. Lipase, helps the digestion of fats and “trypsin” helps the digestion of proteins. The pancreas is located in the visceral region, and is a major part of the digestive system required for proper digestion. Hence, pancreatic juice act on carbohydrates, proteins and fats. Thus, your answer will be option [D].

In which of the statements is or are incorrect, about eating habits of animals?

Animals that obtain their food by killing other animals, called carnivorous and animals which feed on the remains of dead animals preyed by predators, called scavengers

There are given some parts of our body, choose the odd one out

Absorption is the odd one. It is a digestive process that occurs in small intestine. All the others are related to mouth.

The acid present in the stomach

The inner lining of stomach secretes mucus, hydrochloric acid and digestive juices. Out of these HCL kills any bacteria that may enter the stomach with food and makes the medium acidic. Mucus protects the stomach lining from HCL and digestive juices break down proteins in food into simpler substances.

Read the following sentences and choose which of the statement is or are incorrect?

The liver is situated in the upper part of the abdomen on the “right side”. The stomach is situated in the middle part of the abdomen on the “left side”. The pancreas is a cream coloured gland located just below the “stomach”.

Which of the following statements is or are incorrect, about “human digestive system”?

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

The finger-like outgrowth of “Amoeba” helps to ingest food. However, the finger-like outgrowths of human intestine helps to

Villi are the finger-like outgrowths of inner surface of human intestine. Their role is to increase the surface area for rapid absorption of digested food. However, in “Amoeba” the finger like projections are called “pseudopodia” that helps it to catch food particles and to move.

What do you mean by “salivary digestion”?

The food enters into the buccal cavity through mouth. It is chewed by the teeth and mixed with saliva. Saliva contains and enzyme called ptyalin (salivary amylase) which converts complex carbohydrates like starch into sugars. That is why the bread taste become sweet after chewing. This type of digestion is called salivary digestion.

The swallowed food moves down-words in the alimentary canal because of

As soon as the food enters the food pipe, the muscles in its wall start alternate contraction and relaxation producing a wave like movement called “Peristalsis”. These movements are essential for pushing the food downwards in the alimentary canal.

Paheli wants to know the name of the organ that releases digestive juice into the small intestine?

The pancreas is a large cream coloured gland located just below the stomach. It is connected to small intestine. Pancreatic enzymes break down food in the small intestine. When food enters the duodenum, it is deluged with pancreatic juice, which is defined as an alkaline secretion of the pancreas containing enzymes that aid in the digestion of proteins, carbohydrates and fats. As: Pancreatic proteases (such as trypsin and chymotrypsin), which help to digest proteins. Pancreatic amylase, which helps to digest sugars (carbohydrates). Pancreatic lipase, which helps to digest fat.

Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions?

In the human digestive system, parts such as oesophagus, large intestine and rectum do not carry out any digestive functions. Oesophagus carries food from the mouth to the stomach. Large intestine absorbs most of the water from undigested food material. Rectum is the large part of the large intestine where undigested food is stored till it is egested out.

They are given some parts of the digestive system, choose the odd one

Small intestine is the odd one. It releases intestinal juices and is involved in digestion. All others do not take part in the digestion process.

Read the following sentences carefully and choose which of the statements is or are incorrect?

The digestion of food starts in mouth and the digestion is completed in small intestine and the rest options are correct.

Boojho asked a question to Paheli that how many types of taste buds found in our tongue?

There are four kinds of taste buds which detect sweet, salty and bitter taste. These are located in different parts of the tongue.

Boojho wants to know the name of insects which has piercing and sucking mouth parts that pierce food items to enable sucking of internal fluids?

The mosquito's mouth, also called a “proboscis”, isn't just one tiny spear. It's a sophisticated system of six thin, needlelike mouthparts that scientists call “stylets”. Each of which pierces the skin, finds blood vessels and makes it easy for mosquitoes to suck blood. (Note: Only female mosquitoes drink blood is so that they can nourish their child-bearing bodies. Blood is full of proteins and amino acids, which makes it the perfect prenatal supplement for growing mosquito eggs, which is why only female mosquitoes drink blood)

Which of the pairs will give blue-black colour when tested with iodine?

The food containing starch (carbohydrate) on reaction with iodine gives blue-black colour, e.g. boiled and mashed potato, a slice of bread. Glucose solution and mustard oil would not give blue-black colour as they are not starch. Mustard oil is fat and glucose is simple unit of carbohydrate.

Which of the following statements is or are incorrect, about “human digestive system”?

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

Read the statement and choose a word for it: “Organisms which take food hurriedly and store it, in a part of the stomach. This digested food is returned to the buccal cavity for the complete process of digestion”.

Cows, buffaloes and other grass-eating animals (cattle) chewing continuously. Actually, they quickly swallow the grass and store it, in a part of the stomach, called “rumen”. But later the partially digested food (cud) returns to the mouth in small lumps and the animal chews it. This process is called rumination and these animals are called ruminants.

Read the statement which is related to digestive system and choose a word for it: “Transportation of absorbed food of different parts of body and their utilization”.

Assimilation means utilisation of absorbed food for the purpose of generating energy or obtaining energy through the cells. After you eat, your body breaks down food during digestion, absorbs the nutrients, and distributes them to cells during assimilation. Absorption refers the flow of digested food from the digestive system into the blood system for movement around the body. And assimilation gets the nutrients from your food to your cells where they are used for growth and repair of the all parts of the body. This occurs in the small intestine, in particular the jejunum and ileum.

Class 7 Science Chapter 2 MCQ

Class 7 Science Chapter 2 MCQ (Multiple Choice Questions) of Nutrition in Animals. Students can use these questions for the preparation for class tests or examination for new academic session 2020-21.

All the questions are taken from Class 7 Science NCERT Book Chapter 2. If you have done the MCQ test once, you can see the answers and explanation of each answer.

Class 7 Science Chapter 2 MCQ for 2020-21

Class:	7
Subject:	Science
Contents:	Multiple Choice Questions – MCQ Tests

Class 7 Science Chapter 2 MCQ for Exams

Class 7 Science Chapter 2 MCQ are given below with answers and explanation. Attempt at least 5 tests to test your exam preparation based on Class 7 Science Chapter 2. There are 24 sets of MCQ tests for practice containing more than 120 questions. These test will provide a complete revision for second chapter of grade 7 science.

There are given some parts of digestive system, choose the odd one out

[A]. Stomach

[B]. Liver

[C]. Pancreas

[D]. Salivary gland

View Answer

Read the following statement with reference to the “Villi” of small intestine and choose the correct option.

[A]. They have very thin walls, they have a network of thin and small blood vessel close to the surface and they are finger like projections.

[B]. They have a network of thin and small blood vessel close to the surface, they have small pores through which food can easily pass and they are finger like projections.

[C]. They have small pores through which food can easily pass and they are finger like projections.

[D]. They have very thin walls and they are finger like projections.

In which of the statements is or are incorrect about “Amoeba”?

[A]. It pushes out finger like pseudopodia which engulf the prey.

[B]. Lysosome secretes digestive enzymes in the food vacuole.

[C]. Prey is digested and the undigested material is expelled out by the vacuole.

[D]. None of the above.

View Answer

Which of the following pair of teeth differ in structure but are similar in functions?

[A]. Canines and incisors

[B]. Molars and premolars

[C]. Incisors and molars

[D]. Premolars and canines

In which of the statements is or are incorrect about “Amoeba”?

[A]. It pushes out finger like pseudopodia which engulf the prey.

[B]. Lysosome secretes digestive enzymes in the food vacuole.

[C]. Prey is digested and the undigested material is expelled out by the vacuole.

[D]. None of the above.

View Answer

Start a New Test

True or False Questions

1. Parasites are Autotrophs.
2. Amoeba ingest food by Pseudo podia.
3. Milk teeth are replaced by permanent teeth in human.
4. Nutrition is not necessary for all organisms.
5. Large intestine is the longest part of digestive system of human.
6. Digestion of food starts from mouth.
7. A butterfly uses its feeding tube to suck nector from flowers.
8. Ruminants have four chambers of stomach.

Answers of True or False Questions

1. False
2. True
3. True
4. False
5. False
6. True
7. True
8. True

What are the different parts of Human Digestive System?

Human digestive system consists of mouth, oesophagus, stomach, small intestine, large intestine, rectum and anus.

How many type of teeth are there in Human being?

There are four types of teeth found in human being. These are incisors, canines, premolars and molars.

Where is the digested food absorbed in Human being?

The digested food is absorbed at illum of small intestine by finger like structures called villi.

What is absorbed in large intestine?

In large intestine, most of the water is reabsorbed.

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Class 7 Science Chapter 2 MCQ

Class 7 Science Chapter 2 MCQ for 2020-21

Class 7 Science Chapter 2 MCQ for Exams

There are given some parts of digestive system, choose the odd one out

Read the following statement with reference to the “Villi” of small intestine and choose the correct option.

In which of the statements is or are incorrect about “Amoeba”?

Which of the following pair of teeth differ in structure but are similar in functions?

In which of the statements is or are incorrect about “Amoeba”?

True or False Questions

Answers of True or False Questions

What are the different parts of Human Digestive System?

How many type of teeth are there in Human being?

Where is the digested food absorbed in Human being?

What is absorbed in large intestine?

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Class 7 Science Chapter 2 MCQ

Class 7 Science Chapter 2 MCQ for 2020-21

Class 7 Science Chapter 2 MCQ for Exams

There are given some parts of digestive system, choose the odd one out

Read the following statement with reference to the “Villi” of small intestine and choose the correct option.

In which of the statements is or are incorrect about “Amoeba”?

Which of the following pair of teeth differ in structure but are similar in functions?

In which of the statements is or are incorrect about “Amoeba”?

True or False Questions

Answers of True or False Questions

What are the different parts of Human Digestive System?

How many type of teeth are there in Human being?

Where is the digested food absorbed in Human being?

What is absorbed in large intestine?

NCERT Solutions

High School

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