Question

Class 7 Science MCQ Question of Nutrition in Animals with Answers?

Answer 1

Class 7 Science students should refer to the following multiple choice questions with answers for Nutrition in Animals in class 7. These MCQ questions with answers for class 7 Science will come in exams and help you to score good marks. The MCQ Questions for Class 7 Science with answers have been prepared as per the latest syllabus, and examination pattern suggested in class 7 by CBSE.

Class 7 Science Multiple Choice Questions of Nutrition in Animals. Students can use these questions for the preparation for class examinations for academic session. All the questions are taken from Class 7 Science NCERT Book. If you have the MCQ Questions once, you can see the answers and explanation of each answer. Refer to the Nutrition in Animals Class 7 MCQ Questions with Answers here along with a detailed explanation.

Practice MCQ Questions for Class 7 Science

1. Bile is produced in

(a) Gall bladder 
(b) Blood
(c) Liver
(d) Spleen

2. Cud is the name given to the food of ruminants which is:

(а) swallowed and undigested
(b) swallowed and partially digested
(c) properly chewed and partially digested
(d) properly chewed and completely digested

3. The false feet of Amoeba are used for:

(a) movement only
(b) capture of food only
(c) capture of food and movement
(d) exchange of gases only

4. The finger-like outgrowths of Amoeba helps to ingest food. However, the finger-like outgrowths of human intestine helps to:

(a) digest the fatty food substances
(b) make the food soluble
(c) absorb the digested food
(d) absorb the undigested food

5. The main function of the lacteals of intestine is the absorption of

 (a) amino acids
(b) glucose and vitamins
(c) lactic acid
(d) fatty acids and glycerol

6. Which is not digested by human?

(a) Protein
(b) Fats
(c) Glucose
(d) Cellulose

7. The number of incisors, molars, premolars and canines in the buccal cavity is

(a) 8, 4, 8, 8
(b) 8, 4, 8, 4
(c) 4, 8, 8, 8
(d) 8, 8, 8, 4

8. Which of the following pair of teeth differ in structure but are similar in function?

(a) canines and incisors 
(b) molars and premolars
(c) incisors and molars
(d) premolars and canines

9. 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?

(a) Oesophagus, Large Intestine, Rectum
(b) Buccal Cavity, Oesophagus, Rectum
(c) Buccal Cavity, Oesophagus, Large Intestine
(d) Small Intestine, Large Intestine, Rectum

10. The swallowed food moves downwards in the alimentary canal because of

(a) Force provided by the muscular tongue
(b) The flow of water taken with the food
(c) Gravitational pull
(d) The contraction of muscles in the wall of food pipe

11. The acid present in the stomach:

(a) kills the harmful bacterial that may enter along with the food
(b) protects the stomach lining from harmful substances
(c) digests starch into simpler sugars
(d) makes the medium alkaline

12. The enzymes predsent in the saliva convert:

(a) fats into fatty acids and glycerol
(b) starch into simple sugars
(c) proteins into amino acids
(d) complex sugars into simple sugars

13. The semi-solid mass which is produced after thoroughly mix up of food and gastric juice is called

(a) bolus
(b) chyme
(c) bile
(d) villus

14. Which of the following is not a part of digestive system ?

(a) Mouth cavity
(b) Stomach
(c) Food pipe
(d) Wind pipe

15. Salivary glands are located in

(a) mouth
(b) liver
(c) stomach
(d) large intestine

16. Peristaltic movements found in different parts of alimentary canal. In which one of these there is least peristalsis?

(a) Stomach
(b) Duodenum
(c) Rectum
(d) Oesophagus

17. Duodenum, Jejunum, ileum are ______ parts.

(a) Small Intestine
(b) Large Intestine
(c) Esophaguss
(d) Stomach

18. The process through which undigested food is expelled out of the body is called

(a) digestion
(b) absorption
(c) assimilation
(d) egestion

19. Humans cannot digest cellulose whereas cows can do so because

(a) Their gut contains certain bacteria capable of digesting cellulose
(b) They have a many-chambered stomach
(c) They have efficient grinding molars
(d) They produce an enzyme cellulase which can digest cellulose

20. Siphoning is the mode of feeding alone in which type of animal.

(a) Humming bird
(b) Butterfly
(c) Ant
(d) Housefly

21. What is Tooth decay?

(a) Acids released by bacteria damages the teeth
(b) Acids release by bacteria produces the teeth
(c) Acids released by gums damages the teeth
(d) Acids released by gums hold the teeth

22. Base of tongue is sensitive to taste

(a) Salty
(b) Sweet
(c) Bitter
(d) Sour

23. Which of the following animals swallow its prey?

(a) Human beings
(b) Snakes
(c) Humming birds
(d) Ant 

24. The teeth of first set fall off at the age between

(a) 10 – 20
(b) 6 – 8
(c) 9 – 1
(d) 0 – 2

25. Gastric digestion takes place efficiently in

(a) acidic medium
(b) alkaline medium
(c) neutral medium
(d) highly alkaline medium

Answer 2

1. Answer: (c) Liver

Explanation: Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion.

2. Answer: (b) swallowed and partially digested

Explanation: Cud is the partially digested food in the rumen of ruminants like cow.

3. Answer: (c) capture of food and movement

Explanation: Amoeba uses false feet for capture of food and movement. This is the correct answer. Pseudopodia are the extensions of their cytoplasm which helps them to capture food and move.

4. Answer: (c) absorb the digested food

Explanation: Fingerlike projection are present in small intestine and they are called Villi. Villi absorbs nutrients from digested food by increasing space of small intestine.

5. Answer: (d) fatty acids and glycerol

Explanation: Lacteals are lymph vessels responsible for absorbing fat in the small intestine. Occurring in the finger-like villi of the ileum, lacteals have a milky appearance and drain into the lymphatic system. Before fat can pass into the lacteal, bile from the liver causes its emulsification into small droplets for action of the enzyme lipase.

6. Answer: (d) Cellulose

Explanation: Cellulose is not digested by human because human digestive system not have a system to digest cell is cellulose.

7. Answer: (d) 8, 8, 8, 4

Explanation: Incisors (8 total): The middlemost four teeth on the upper and lower jaws.

Molars (8 total): Flat teeth in the rear of the mouth, best at grinding food

Premolars (8 total): Teeth between the canines and molars.

Canines (4 total): The pointed teeth just outside the incisors.

8. Answer: (b) molars and premolars

Explanation: The molars are the largest teeth of all. The premolars present next to molars. Molars are 12 in number, whereas premolars are 8 in number. The function of these types of teeth is similar, i.e., crushing and grinding of food. 

9. Answer: (a) Oesophagus, Large Intestine, Rectum

Explanation: Oesophagus. Large Intestine, Rectum" does not perform any digestive function in the human body. Oesophagus transfers food from the mouth to the stomach.In the large intestine, a huge portion of the water from undigested food material is absorbed. The rectum is termed as storage of undigested food till egestion.

10. Answer: (d) The contraction of muscles in the wall of food pipe.

Explanation: When food goes into the food pipe, the muscles in its walls start alternate contraction and relaxation producing a wave-like movement that called 'peristalsis'. These movements are necessary for forwarding the food downwards in the alimentary canal. 

11. Answer: (a) kills the harmful bacterial that may enter along with the food

Explanation: 'Hydrochloric acid' is an acid that is secreted in the stomach. It helps to kill the harmful bacteria that may enter the food. 

12. Answer: (b) starch into simple sugars

Explanation: The saliva contains amylase enzyme that breaks down starch into simple sugar.

13. Answer: (b) chyme

Explanation: In this phase, these movements of the stomach are also called “mixing waves”, since their primary function is to mix food –food bolus- with stomach secretions or gastric juices. Chyme is formed from this mixture, a semi-solid pasty mass made up of digested food.

14. Answer: (d) Wind pipe

Explanation: The alimentary canal is a muscular tube, which extends from the mouth to the anus. The main organs of the alimentary canal are: The Mouth: It is the first part of our digestive system.

15. Answer: (a) mouth

Explanation: Salivary glands are located in the mouth. There are three pairs of large salivary glands. Parotid glands are found in front of and just below each ear. Submandibular glands are below the jaw.

Answer 3

16. Answer: (c) Rectum

Explanation: Peristalsis is the series of involuntary movements in the digestive tract. It is characterized by waves of alternate circular contraction and relaxation of the longitudinal smooth muscle of tube by which the contents are propelled onward. Medulla is responsible for the peristaltic movement of food. Muscle contraction also mixes food with the digestive juices. They also act as valves preventing back flow in the tract.

17. Answer: (a) Small Intestine

Explanation: The small intestine (small bowel) lies between the stomach and the large intestine (large bowel) and includes the duodenum, jejunum, and ileum. The small intestine is so called because its lumen diameter is smaller than that of the large intestine, although it is longer in length than the large intestine.

18. Answer: (d) egestion

Explanation: This leaves semi-solid waste material called faeces. The faeces are stored in the rectum, the last part of the large intestine. Egestion happens when these faeces pass out of the body through the anus.

19. Answer: (a) Their gut contains certain bacteria capable of digesting cellulose

Explanation: Humans lack the enzyme necessary to digest cellulose. Hay and grasses are particularly abundant in cellulose, and both are indigestible by humans (although humans can digest starch). Animals such as termites and herbivores such as cows, koalas and horses all digest cellulose, but even these animals do not themselves have an enzyme that digests this material. Instead, these animals harbour microbes that can digest cellulose. Animals such as cows have anaerobic bacteria in their digestive tracts which digest cellulose. Cows are ruminants. Ruminants have several stomachs that break down plant materials with the help of enzymes and bacteria.

20. Answer: (b) Butterfly

Explanation: Siphoning is a mode of nutrition in which animal suck the food from substratum. e.g. nectar sucking by butterflies. Sponging is a mode of nutrition found in houseflies, in which insect secrete saliva over the food and dissolved food is drawn up into the mouth of insect in solution form.

21. Answer: (a) Acids released by bacteria damages the teeth

Explanation: The bacteria break down the sugars present from the leftover food and release acids. The acids gradually damage the teeth. This is called tooth decay.
If it is not treated in time, it causes severe toothache and in extreme cases results in tooth loss. Chocolates, sweets, soft drinks and other sugar products are the major culprits of tooth decay.

22. Answer: (c) Bitter

Explanation: Tastes like sweet, salt, sour, bitter are sensed by all the sides of the tongue but the back of the tongue is very sensitive to bitter tastes.

23. Answer: (b) Snakes

Explanation: Their jaw is structured in such a way that it allows the mouth to open wider than their own body in order to swallow their prey whole. Snakes do not have the right kind of teeth to chew their food and they capture the prey whole and swallow it.

24. Answer: (b) 6 – 8

Explanation: The first set of teeth grows during infancy and they fall off at the age between six to eight years. These are termed as milk teeth.

25. Answer: (a) acidic medium

Explanation: The gastric juice is made up of hydrochloric acid, pepsinogen and other digestive enzymes, gastrin, mucus, and bicarbonates. It has a pH ranging from 1 to 2. Its low pH is essential in activating many digestive enzymes and in destroying various pathogens. So, gastric digestion takes place efficiently in acidic medium.

Click here for Practice MCQ Questions for Nutrition in Animals Class 7