Nutrition in Animals Class 7 MCQs – Best 100

Correct Answer: C. Ingestion is the process of taking food into the body.

Correct Answer: B. Hummingbirds suck nectar from flowers.

Correct Answer: C. Pythons swallow their prey whole.

Correct Answer: B. Some aquatic animals filter tiny food particles from the water.

Correct Answer: B. Activity 2.1 focuses on observing and classifying how different animals eat.

Correct Answer: C. The digestive process starts in the mouth with ingestion and chewing.

Correct Answer: A. The liver is a gland associated with the digestive system, but not part of the alimentary canal.

Correct Answer: B. The buccal cavity is the scientific term for the mouth.

Correct Answer: C. The anus is responsible for the removal of waste products (egestion).

Correct Answer: C. Salivary glands produce saliva.

Correct Answer: C. Teeth are responsible for the mechanical breakdown of food by chewing.

Correct Answer: A. Incisors are the sharp, front teeth used for cutting and biting.

Correct Answer: C. Molars are the flat teeth at the back of the mouth used for grinding food.

Correct Answer: C. Saliva contains amylase, an enzyme that breaks down starch into simpler sugars.

Correct Answer: D. The tongue does not secrete hydrochloric acid; that is the function of the stomach.

Correct Answer: A. The foodpipe, or esophagus, transports food from the mouth to the stomach.

Correct Answer: A. Peristalsis is the wave-like muscle movement that propels food through the digestive tract.

Correct Answer: A. The epiglottis is a flap-like structure that covers the windpipe during swallowing.

Correct Answer: B. If food enters the windpipe, it can cause coughing or choking.

Correct Answer: C. The esophagus runs through the neck and chest, connecting the mouth to the stomach.

Correct Answer: A. The stomach is described as having a flattened J shape.

Correct Answer: D. Bile is secreted by the liver, not the stomach.

Correct Answer: C. Mucus forms a protective layer on the stomach lining to prevent damage from acid.

Correct Answer: A. Hydrochloric acid creates an acidic environment that helps in protein digestion and kills bacteria.

Correct Answer: C. The stomach initiates the digestion of proteins with the help of enzymes and hydrochloric acid.

Correct Answer: B. Dr. William Beaumont studied stomach function through a patient with a hole in his stomach, Alexis St. Martin.

Correct Answer: A. The pyloric sphincter controls the passage of food from the stomach into the small intestine.

Correct Answer: B. The stomach mechanically churns food and initiates protein digestion, but complete digestion occurs later.

Correct Answer: C. Most nutrient absorption occurs in the small intestine, not the stomach.

Correct Answer: A. The churning action mixes food thoroughly with the stomach’s secretions.

Correct Answer: C. The small intestine is about 7.5 meters long.

Correct Answer: A. The liver and pancreas release bile and pancreatic juice, into the small intestine.

Correct Answer: A. The liver produces bile, which is stored in the gall bladder.

Correct Answer: B. Bile helps in the digestion of fats by breaking them down into smaller droplets.

Correct Answer: D. Pancreatic juice contains enzymes for digesting all three major macronutrients: carbohydrates, fats, and proteins.

Correct Answer: B. The final stages of digestion and absorption of nutrients occur in the small intestine.

Correct Answer: C. Carbohydrates are ultimately digested into simple sugars, primarily glucose.

Correct Answer: A. Proteins are digested into their building blocks, amino acids.

Correct Answer: B. Fats are digested into fatty acids and glycerol.

Correct Answer: A. The coiling of the small intestine increases its surface area, allowing for more efficient nutrient absorption.

Correct Answer: C. Absorption is the movement of digested nutrients from the small intestine into the bloodstream.

Correct Answer: A. Villi are the tiny, finger-like projections that line the small intestine.

Correct Answer: A. Blood vessels carry absorbed nutrients throughout the body.

Correct Answer: B. Assimilation is the process of using absorbed nutrients to build and repair body tissues.

Correct Answer: B. Cellular respiration breaks down glucose in the presence of oxygen to release energy.

Correct Answer: B. The large intestine primarily absorbs water and some salts from undigested food.

Correct Answer: C. The rectum is the final part of the large intestine where faeces are stored.

Correct Answer: C. Egestion is the elimination of undigested waste products from the body.

Correct Answer: C. Complete digestion occurs in the small intestine, not the large intestine.

Correct Answer: A. The large intestine is often referred to as the colon.

Correct Answer: B. Rumination is the process where cud is brought back to the mouth for further chewing.

Correct Answer: A. The rumen is the largest compartment of the ruminant stomach where food is stored and partially digested.

Correct Answer: B. Bacteria in the rumen of ruminants help break down cellulose, which animals cannot digest on their own.

Correct Answer: C. The caecum is a large sac-like structure in non-ruminant herbivores where cellulose digestion occurs.

Correct Answer: C. Cows are ruminants, possessing a specialized stomach for digesting cellulose-rich food like grass.

Correct Answer: C. Pseudopodia, or false feet, are temporary extensions of the amoeba’s cytoplasm used for movement and capturing food.

Correct Answer: C. Amoeba surrounds food particles with its pseudopodia and engulfs them.

Correct Answer: A. A food vacuole is a membrane-bound sac within the amoeba where food is digested.

Correct Answer: C. Digestive enzymes are secreted into the food vacuole, where digestion occurs.

Correct Answer: B. Undigested food is expelled from the amoeba by egestion through the cell membrane.

Correct Answer: A. The correct sequence is ingestion (taking in food), digestion (breaking down food), absorption (nutrients entering the bloodstream), assimilation (using nutrients), and egestion (removing waste).

Correct Answer: B. Digestion is the breakdown of complex food into simpler molecules.

Correct Answer: D. Assimilation is the process of using absorbed nutrients for growth and maintenance.

Correct Answer: D. Egestion is the elimination of undigested waste.

Correct Answer: C. Photosynthesis is the process by which plants make their own food, not a component of animal nutrition.

Correct Answer: C. Glucose is the primary source of energy for cellular respiration.

Correct Answer: C. Glucose is a simple sugar, the simplest form of carbohydrate.

Correct Answer: A. Amino acids are the building blocks of proteins.

Correct Answer: B. Fats are digested into fatty acids and glycerol.

Correct Answer: A. Villi are tiny projections in the small intestine that increase surface area for absorption.

Correct Answer: B. The gall bladder stores bile, not the liver.

Correct Answer: C. The gall bladder is situated under the liver.

Correct Answer: A. Amylase is the enzyme in saliva that begins the digestion of starch.

Correct Answer: A. Hydrochloric acid creates the acidic conditions in the stomach.

Correct Answer: A. Cud is the partially digested food that ruminants regurgitate for further chewing.

Correct Answer: C. The rumen is the first and largest compartment of the ruminant stomach.

Correct Answer: B. Amoeba constantly changes its shape.

Correct Answer: A. Egestion is the process of removing undigested waste.

Correct Answer: C. Horses are non-ruminant herbivores; they have a caecum for cellulose digestion.

Correct Answer: C. Ingestion is the act of taking food into the body.

Correct Answer: B. Villi significantly increase the surface area of the small intestine, facilitating efficient nutrient absorption.

Correct Answer: A. The epiglottis is a flap that closes over the windpipe during swallowing, preventing food or liquid from entering the lungs.

Correct Answer: B. Digestion is the process of breaking down food into smaller, absorbable molecules.

Correct Answer: B. Saliva does not contain enzymes for protein digestion; that begins in the stomach.

Correct Answer: C. Absorption is the movement of digested nutrients from the small intestine into the bloodstream.

Correct Answer: A. Amino acids are the basic units that make up proteins.

Correct Answer: B. The small intestine is the main site of nutrient absorption due to its large surface area and specialized structures like villi.

Correct Answer: D. Assimilation is the process of incorporating absorbed nutrients into the body’s cells and tissues.

Correct Answer: A. The liver produces bile, which is then stored in the gall bladder.

Correct Answer: C. Amylase, found in saliva, begins the digestion of starch.

Correct Answer: B. Peristalsis is the wave-like muscle contractions that propel food through the digestive tract.

Correct Answer: B. The large intestine does not produce digestive enzymes; most digestion is completed in the small intestine.

Correct Answer: A. A bolus is a small, rounded mass of chewed food ready for swallowing.

Correct Answer: C. Horses have a caecum, a pouch-like structure where bacteria help digest cellulose.

Correct Answer: A. Villi are the finger-like projections that line the small intestine, increasing its surface area for absorption.

Correct Answer: A. Phagocytosis is the process by which amoeba engulfs solid food particles.

Correct Answer: B. The trachea, or windpipe, is part of the respiratory system, not the digestive system.

Correct Answer: B. Milk teeth typically fall out and are replaced by permanent teeth between the ages of 6 and 8.

Correct Answer: A. Cows are ruminant animals, possessing a four-chambered stomach for digesting cellulose-rich plant material.

Correct Answer: B. Digestion is the process of breaking down complex food molecules into simpler ones that the body can absorb.