Free Digestion MCQs with Answers

• A. Mucosa
• B. Serosa
• C. Muscularis
• D. Adventitia

Explanation: The stomach is made of these 4 layers: •Mucosa;This is the first and innermost layer or lining.

• A. Stomach
• B. Small intestine
• C. The large intestine of food
• D. Oesophagus

Explanation: Discontinuous feeding is possible because of the stomach because it stores food for a long time.

• A. 3
• B. 4
• C. 5
• D. 6

Explanation: This is the correct answer. In humans, digestion occurs at three main sites: a.

• A. Smell
• B. Sight
• C. Sound
• D. Taste

Explanation: Smell, taste and sight help for selection of food, Sound is not related to food selection.

• A. Perform chemical digestion
• B. Stabilize the pH
• C. Act as antiseptic agent
• D. Act as promoter of ptyallin

Explanation: NaHCO3 is bicarbonate which neutralizes the pH in acidic enviroment.

• A. Respiratory tract
• B. Reproductive tract
• C. Digestive tract
• D. Urinary tract

Explanation: Human digestive tract starts from oral cavity and ends at annus. Food in digestive tract moves downward with the help of peristalsis…

• A. Oesophagus
• B. Duodenum
• C. Stomach
• D. Jejunum

Explanation: Oesophagus is a muscular tubular part which starts peristalsis in alimentary cannals and secretes no enzyme.

• A. Rennin
• B. Renin
• C. Amylase
• D. Enterokinase

Explanation: •Rennin is an enzyme in new born for colestrum digestion. Rennin is an enzyme released from stomach.

• A. Starch, Proteins and Fats
• B. Vitamins, carbohydrates and polyeptides
• C. Protien, Cellulose and fats
• D. Protein, starch and cellulose

Explanation: Oral cavity is the site of digestion of protein, cellulose and fats are not digested.

• A. Goblet Cells
• B. Zymogen Cells
• C. Parietal Cells
• D. Oxyntic Cells

Explanation: Zymogen (cheif) cells. Which are to produce the enzymes pepsin and rennin.(Pepsin digests proteins, and rennin curdles milk).

• A. Pyloric sphincter
• B. Semilunar valve
• C. Cardiac sphincter
• D. Diaphragm

Explanation: The pyloric sphineter is a small piece of smooth visceral muscle the acts as a valve and regulates the flow of partially digested food…

• A. Hepatic vien _vena cava
• B. Mouth _Stomach
• C. Pancreas_small intestine
• D. Small intestine _liver

Explanation: The vein that pours blood from liver to circulatory system is hepatic vein whereas hepatic portal vein pours blood from digestive system…

• A. 1,4 and 5
• B. 1,2 and 3
• C. 2,6 and 4
• D. 3,5 and 4

Explanation: Amylase is mostly present in the mouth, in pancreatic juice and ileum, hence option A is correct.

• A. Growth
• B. Magnesium and nitrogen
• C. Yellowing of leaf margin
• D. Width of leaf

Explanation: The deiciencies of some elements cause serious diseases showing clear symptoms.

• A. Saprophytic nutrition
• B. Parasitic nutrition
• C. Nutrition
• D. Symbiotic nutrition

Explanation: Nutrition is the taking and utilization of elements by which growth repair and maintenance of activities in the organism are accomplished.

• A. Dodder
• B. Bacteria that breakdown the proteins of plants and animals
• C. Mycorrhiza
• D. Puccinia

Explanation: Mycorrhizae are a symbiotic association between plant roots and fungi. Their major role is to enhance nutrient and water uptake by the…

• A. Filter feeders
• B. Omnivores
• C. Fluid feeders
• D. Macrophagus feeders

Explanation: Omnivores are the animals that feed on plants and animals both.

• A. Endoparasite
• B. Facultative Parasite
• C. Ectoparasite
• D. Obligate Parasite

Explanation: An ectoparasite is one that lives on the outside of organisms.

• A. Egestion
• B. Ingestion
• C. Absorption
• D. Assimilation

Explanation: Assimilation is the utilization of the products of digestion for production of energy or synthesis of cellular material.

• A. Cilia
• B. Pseudopodia
• C. Tentacles
• D. Hair like tentacles

Explanation: A. Found in paramecium C. Present in hydra D. Present in sundew