QUESTION BANK

CLASS VII SCIENCE

CHAPTER IX: LIFE PROCESSES IN ANIMALS

Direct Questions Assertion / Reason Correct / Incorrect HOTS Challenging

DIRECT QUESTIONS

The process of taking food into the body is called:

A. Digestion

B. Ingestion

C. Absorption

D. Assimilation

Answer: B. Ingestion

Which of the following components of food is broken down into glucose during digestion?

A. Proteins

B. Fats

C. Carbohydrates

D. Vitamins

Answer: C. Carbohydrates

The breakdown of complex components of food into simpler substances is called:

A. Ingestion

B. Digestion

C. Egestion

D. Respiration

Answer: B. Digestion

Which organ in the human digestive system is responsible for the absorption of water?

A. Small intestine

B. Large intestine

C. Stomach

D. Oesophagus

Answer: B. Large intestine

The finger-like outgrowths in the inner walls of the small intestine are called:

A. Villi

B. Alveoli

C. Pseudopodia

D. Cilia

Answer: A. Villi

Bile juice is stored in a sac-like organ called:

A. Liver

B. Gall bladder

C. Pancreas

D. Stomach

Answer: B. Gall bladder

The largest gland in the human body is:

A. Pancreas

B. Thyroid

C. Liver

D. Pituitary

Answer: C. Liver

Amoeba captures its food with the help of:

A. Cilia

B. Tentacles

C. Pseudopodia

D. Food vacuole

Answer: C. Pseudopodia

The acid produced in the stomach that kills bacteria is:

A. Sulphuric acid

B. Nitric acid

C. Hydrochloric acid

D. Acetic acid

Answer: C. Hydrochloric acid

Ruminants can digest cellulose because of the presence of certain bacteria in their:

A. Rumen

B. Small intestine

C. Mouth

D. Oesophagus

Answer: A. Rumen

Which part of the digestive canal is involved in the killing of bacteria?

A. Buccal cavity

B. Stomach

C. Small intestine

D. Large intestine

Answer: B. Stomach

The process by which digested food passes into the blood vessels in the wall of the intestine is:

A. Assimilation

B. Absorption

C. Digestion

D. Egestion

Answer: B. Absorption

The digestion of starch begins in the:

A. Stomach

B. Small intestine

C. Buccal cavity

D. Oesophagus

Answer: C. Buccal cavity

Which teeth are used for piercing and tearing food?

A. Incisors

B. Canines

C. Premolars

D. Molars

Answer: B. Canines

The semi-digested food in the rumen of a cow is called:

A. Chyme

B. Cud

C. Bolus

D. Pellet

Answer: B. Cud

Proteins are broken down into:

A. Fatty acids

B. Glycerol

C. Amino acids

D. Glucose

Answer: C. Amino acids

Which organ is responsible for the complete digestion of all components of food?

A. Stomach

B. Large intestine

C. Small intestine

D. Liver

Answer: C. Small intestine

The length of the small intestine in an adult human is approximately:

A. 1.5 metres

B. 2.5 metres

C. 7.5 metres

D. 10 metres

Answer: C. 7.5 metres

The tongue helps in:

A. Mixing food with saliva

B. Swallowing food

C. Detecting tastes

D. All of the above

Answer: D. All of the above

The removal of undigested and unabsorbed residue from the body is:

A. Digestion

B. Absorption

C. Egestion

D. Assimilation

Answer: C. Egestion

Which of the following is NOT a part of the human digestive system?

A. Oesophagus

B. Trachea

C. Rectum

D. Pancreas

Answer: B. Trachea (It is part of the respiratory system)

The mode of nutrition in which organisms take in nutrients from dead and decaying matter is:

A. Autotrophic

B. Saprotrophic

C. Parasitic

D. Holozoic

Answer: B. Saprotrophic

What is the function of mucus in the stomach?

A. To digest proteins

B. To protect the stomach lining

C. To kill bacteria

D. To absorb water

Answer: B. To protect the stomach lining

The first set of teeth that grows during infancy and falls off at the age of six to eight years are:

A. Permanent teeth

B. Milk teeth

C. Wisdom teeth

D. Incisors

Answer: B. Milk teeth

How many molars are typically found in each jaw of an adult human?

A. 2

B. 4

C. 6

D. 8

Answer: C. 6

The digestive juice that acts on both carbohydrates and proteins is:

A. Bile juice

B. Saliva

C. Pancreatic juice

D. Gastric juice

Answer: C. Pancreatic juice

In Amoeba, the undigested residue of the food is expelled outside by the:

A. Pseudopodia

B. Nucleus

C. Vacuole

D. Cell membrane

Answer: C. Vacuole (Contractile/Food vacuole)

Which of the following is a ruminant?

A. Dog

B. Human

C. Buffalo

D. Lion

Answer: C. Buffalo

The utilized food is used for energy, growth, and maintenance in the process called:

A. Absorption

B. Assimilation

C. Ingestion

D. Digestion

Answer: B. Assimilation

The taste buds for "bitter" taste are mostly located on the ________ of the tongue.

A. Tip

B. Sides

C. Back

D. Underneath

Answer: C. Back

Which part of the tooth is the hardest substance in the human body?

A. Dentin

B. Pulp

C. Enamel

D. Gum

Answer: C. Enamel

Fat is completely digested in the:

A. Stomach

B. Mouth

C. Small intestine

D. Large intestine

Answer: C. Small intestine

Which gland secretes saliva?

A. Liver

B. Pancreas

C. Salivary glands

D. Pituitary

Answer: C. Salivary glands

The movement of food in the alimentary canal is called:

A. Circulation

B. Peristalsis

C. Translocation

D. Diffusion

Answer: B. Peristalsis

Diarrhoea is caused by:

A. Infection

B. Food poisoning

C. Indigestion

D. All of the above

Answer: D. All of the above

ASSERTION AND REASON

A. Both A and R are true and R is the correct explanation of A.

B. Both A and R are true but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Assertion (A): Villi are present in the small intestine.

Reason (R): Villi increase the surface area for absorption of digested food.

Answer: A. Both A and R are true and R is the correct explanation of A.

Assertion (A): Digestion of food is a chemical change.

Reason (R): Complex food substances are converted into new, simpler substances.

Answer: A. Both A and R are true and R is the correct explanation of A.

Assertion (A): Humans can digest cellulose like cows.

Reason (R): Humans have a large sac-like structure called rumen.

Answer: D. A is false but R is true (Note: R is technically false for humans, but A is definitely false).

Assertion (A): Bile juice helps in the digestion of fats.

Reason (R): Bile juice is produced by the gall bladder.

Answer: C. A is true but R is false (Bile is produced by the liver).

Assertion (A): Amoeba has no fixed shape.

Reason (R): It constantly changes its shape and position by pushing out pseudopodia.

Answer: A. Both A and R are true and R is the correct explanation of A.

CORRECT / INCORRECT STATEMENTS

Which of the following statements is INCORRECT?

A. Digestion of starch starts in the stomach.

B. The tongue helps in mixing food with saliva.

C. The gall bladder stores bile temporarily.

D. Ruminants bring back swallowed grass into their mouth and chew it for some time.

Answer: A. Digestion of starch starts in the stomach.

Identify the CORRECT statement:

A. The large intestine is longer than the small intestine.

B. The small intestine is the site of complete digestion.

C. Canines are used for grinding food.

D. Saliva breaks down proteins into amino acids.

Answer: B. The small intestine is the site of complete digestion.

Which of the following is CORRECT regarding Amoeba?

A. It is a multicellular organism.

B. It digests its food in the food vacuole.

C. It uses tentacles for ingestion.

D. It has a well-defined digestive system.

Answer: B. It digests its food in the food vacuole.

Find the INCORRECT statement:

A. ORS should be given to patients suffering from diarrhoea.

B. Enamel is the outermost layer of the teeth.

C. Ruminants can digest grass because of the rumen.

D. Absorption of food takes place in the stomach.

Answer: D. Absorption of food takes place in the stomach.

HOTS (HIGHER ORDER THINKING SKILLS)

Why do we get a "hiccup" or a choking sensation if we talk or laugh while eating?

A. Food enters the stomach too fast.

B. The epiglottis fails to close the windpipe, and food particles enter the trachea.

C. Saliva becomes too thick.

D. The tongue gets stuck.

Answer: B. The epiglottis fails to close the windpipe, and food particles enter the trachea.

What would happen if the small intestine did not have villi?

A. Digestion would stop.

B. The rate of absorption of digested food would decrease significantly.

C. Food would move faster to the stomach.

D. Water absorption would increase.

Answer: B. The rate of absorption of digested food would decrease significantly.

Why can cows digest grass but humans cannot?

A. Cows have sharper teeth.

B. Cows have a rumen containing bacteria that can break down cellulose.

C. Grass is too green for humans.

D. Humans do not like the taste of grass.

Answer: B. Cows have a rumen containing bacteria that can break down cellulose.

A person's gall bladder was surgically removed. Which type of food should they avoid in large quantities?

A. Sugary foods

B. Oily and fatty foods

C. Protein-rich foods

D. Fiber-rich foods

Answer: B. Oily and fatty foods (Bile is needed for fat emulsification).

Why is the small intestine called "small" even though it is much longer than the large intestine?

A. Because it carries smaller food particles.

B. Because it has a smaller diameter (width).

C. Because it is located in a small part of the body.

D. Because it was discovered later.

Answer: B. Because it has a smaller diameter (width).

CHALLENGING QUESTIONS

Which of the following is the correct sequence of steps in nutrition?

A. Ingestion → Digestion → Absorption → Assimilation → Egestion

B. Ingestion → Absorption → Digestion → Assimilation → Egestion

C. Digestion → Ingestion → Absorption → Assimilation → Egestion

D. Ingestion → Digestion → Assimilation → Absorption → Egestion

Answer: A. Ingestion → Digestion → Absorption → Assimilation → Egestion

What is the role of the pancreatic juice?

A. Digestion of carbohydrates only.

B. Digestion of proteins only.

C. Digestion of fats only.

D. Digestion of carbohydrates, proteins, and fats.

Answer: D. Digestion of carbohydrates, proteins, and fats.

Which of the following is responsible for the "pop" sound when starch is tested with iodine after being mixed with saliva?

A. The iodine reacts with sugar.

B. The saliva has converted starch into sugar, so no blue-black color appears.

C. The starch has become harder.

D. The saliva has produced carbon dioxide.

Answer: B. The saliva has converted starch into sugar, so no blue-black color appears.

The wall of the large intestine absorbs mostly:

A. Digested proteins

B. Digested fats

C. Water and some salts

D. Glucose

Answer: C. Water and some salts

Which of the following animals has a digestive system with a single opening that serves as both mouth and anus?

A. Amoeba

B. Hydra

C. Cow

D. Human

Answer: B. Hydra