Free Digestion MCQs with Answers
680 Digestion MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
Last updated
Read the Digestion notesFree MDCAT chapter notes with key terms680 questions · page 12 of 34
- A. Form flask shaped structure
- B. Bllobed structure with midrib
- C. Have hair like tentacles
- D. Have nodes
Explanation: Sundews are "flypaper" plants that trap prey in sticky hairs on their leaves.
Correct answer: Have hair like tentacles- A. Ptyalin
- B. Saliva
- C. Pepsin
- D. Pancreatic Juice
- E. Gastric Juice
Explanation: Option A: Ptyalin is a form of amylase found in the saliva of humans and some other animals.It digests only carbohydrates,not…
Correct answer: Pancreatic Juice- A. Fatty liver
- B. Liver necrosis
- C. Jaundice
- D. None of them
Explanation: Fatty liver disease (steatosis) is a common condition caused by having too much fat build-up in your liver.
Correct answer: Fatty liver- A. Esophagus
- B. Stomach
- C. Small intestine
- D. Rectum
Explanation: The simple molecules that result from chemical digestion pass through cell membranes of the lining in the small intestine into the blood…
Correct answer: Small intestine- A. Obesity
- B. Anorexia nervous
- C. Bulimiia nervous
- D. Dyspepsia
Explanation: Incomplete or imperfect digestion is known as dyspepsia. Dyspepsia is a medical condition characterized by upper abdominal pain, fullness…
Correct answer: Dyspepsia- A. Bronchi
- B. Bronchioles
- C. Larynx
- D. Pharynx
Explanation: "The explanation for this question will be added soon!".
Correct answer: Pharynx- A. Detrivores
- B. Carnivores
- C. Herbivores
- D. Insectivorous plants
Explanation: A. The animals which feed on detritus B. Animals that feed on other animals D. These are insect eating plants
Correct answer: Herbivores- A. Buccal cavity
- B. Esophagus
- C. Liver
- D. Stomach
Explanation: Mouth with oral mucosa.Buccal cavity opens into the esophagus and esophagus opens into the cardiac end of the stomach.
Correct answer: Liver- A. Sublingual
- B. Sub maxillary
- C. Parotid
- D. Pancreas
Explanation: •Situated below the tongue •Situated behind the jaws •Not a salivary gland
Correct answer: Parotid- A. Mucous cells
- B. Parietal cells
- C. Zymogen cells
- D. Chyme
Explanation: The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins.
Correct answer: Parietal cells- A. Erypsin
- B. Maltase
- C. Lactase
- D. Lipase
Explanation: Lipase is an enzyme the body uses to break down fats in food so they can be absorbed in the intestines.
Correct answer: Lipase- A. Bile, pancreatic juice, and intestinal juice
- B. Pancreatic juice, intestinal juice, and gastric juice
- C. Bile, pancreatic juice, and gastric juice
- D. Bile, gastric juice, and saliva.
Explanation: Secretions released in the small intestine are bile juice, pancreatic juice and intestinal juice.
Correct answer: Bile, pancreatic juice, and intestinal juice- A. Stomach in acidic medium
- B. Stomach in alkaline medium
- C. Duodenum in acidic medium
- D. Duodenum in alkaline medium
Explanation: Trypsin and chymotrypsin are ending peptidase type of enzymes and are active in alkaline pH i.e., 7.5 to 8.
Correct answer: Duodenum in alkaline medium- A. Protein into amino acid
- B. Starch into maltose
- C. Glysogen into glucose
- D. Fats into vitamins
Explanation: Therefore, the correct answer is B) Starch into maltose, as saliva contains salivary amylase, which initiates the digestion of starch by…
Correct answer: Starch into maltose- A. Liver
- B. Pancreas
- C. Villi
- D. Spleen
Explanation: Lacteals are central lymph vessels found in the villi of the intestine. It is related to the absorption of fat.
Correct answer: Villi- A. Lipase
- B. Salts
- C. Bile pigments
- D. Necessary enzymes
Explanation: Bile acid contains bile salts, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.
Correct answer: Salts- A. HCL is too dilute
- B. The epithelial cells are resistant to the action of HCL
- C. HCL is neutralized in the stomach
- D. The epithelial cells are covered by a mucus layer
Explanation: The epithelium of gastric glands (present in the stomach) consists of goblet cells that secrete mucus.
Correct answer: The epithelial cells are covered by a mucus layer- A. Selection of food
- B. Grinding and mastication
- C. Lubrication
- D. Digestion of protein
Explanation: The mouth or oral cavity is the first part of the digestive tract. It is adapted to receive food by ingestion breaking it into small…
Correct answer: Digestion of protein239. Pick one mismatched:
- A. Sublingual - below the tongue
- B. Sub maxillary - behind jaws
- C. Parotid - in front of the ear
- D. Lacrimal - saliva
Explanation: Humans have three paired major salivary glands (parotid, submandibular, and sublingual) While the lacrimal gland is located within the…
Correct answer: Lacrimal - saliva- A. Trypsin
- B. Lipase
- C. Maltase
- D. Amino peptidase
Explanation: Amino peptidase splits polypeptides into dipeptides and amino acids.
Correct answer: Amino peptidase