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 29 of 34
- A. Ileum
- B. Jejunum
- C. Duodenum
- D. None of these
Explanation: Fact: Jejunum is about 2.5 m in length and is about 2/5 of the small intestine(which is about 7m in length).
Correct answer: Jejunum- A. Sublingual gland
- B. Submaxillary glands
- C. Parotid glands
- D. Adrenal glands
Explanation: There are 3 salivary glands located in the buccal cavity. Sublingual glands, submaxillary and parotid glands.
Correct answer: Submaxillary glands- A. Liver
- B. Adrenals
- C. Thymus
- D. Parotid
Explanation: The largest gland in the human body is the liver. It is a large, reddish-brown organ that is located in the upper right abdomen.
Correct answer: Liver- A. Rectum
- B. Colon
- C. Caecum
- D. Appendix
Explanation: The largest part of the large intestine is the colon. The colon is about 5 feet long and is divided into four parts: the cecum, the…
Correct answer: Colon- A. Decrease the temperature
- B. Increase the amount of substrate
- C. Decrease the Ph
- D. Increase the amount of enzymes
Explanation: Increasing the amount of enzymes is the best way to increase enzyme activity is because enzymes are catalysts, and they work by binding to…
Correct answer: Increase the amount of enzymes- A. 1.5
- B. 5-7
- C. 2-3
- D. 4-5
Explanation: The pH of fresh HCl present in the stomach is 1.5.The low pH of HCl in the stomach helps to kill harmful bacteria and parasites that may…
Correct answer: 1.5- A. Enterococcus
- B. Pseudomonas
- C. Campylobacter
- D. Spirochete
Explanation: Enterococci are a group of Gram-positive bacteria that are found in the human body, including the mouth, gut, and skin.
Correct answer: Enterococcus- A. Grinding
- B. Digestion
- C. Lubrication
- D. Absorption
Explanation: The oral cavity is the first part of the digestive tract, and its main functions are to receive food, break it into smaller particles by…
Correct answer: Absorption- A. Anal styles in male
- B. Anal cerci in female
- C. Anal style and antennae in females
- D. Both (b) and (c)
Explanation: In a male cockroach, the 9th sternum bears a pair of short, unjointed threadlike anal styles which are absent in the female.
Correct answer: Anal styles in male- A. Esophagus
- B. Duodenum
- C. Caecum
- D. Heart
Explanation: The cardiac sphincter is located between the esophagus and the stomach, preventing backflow of food.
Correct answer: Esophagus- A. Trypsin
- B. Maltase
- C. Lipase
- D. Amino peptidase
Explanation: Aminopeptidase is an enzyme found in the small intestine, specifically on the brush border of the intestinal lining.
Correct answer: Amino peptidase- A. Somatostatin
- B. Gastrin
- C. Thyroxine
- D. Parathormone
Explanation: This is the correct option because somatostatin inhibits the secretion of pancreatic juice by suppressing the release of digestive enzymes…
Correct answer: Somatostatin- A. Hard palate
- B. Epiglottis
- C. Soft palate
- D. Larynx
Explanation: The epiglottis is a flap of tissue that covers the trachea during swallowing, preventing food from entering the respiratory passage.
Correct answer: Epiglottis- A. All the students
- B. did not participate
- C. because
- D. plenty of miles
Explanation: The error is in the phrase 'plenty of miles.' While it may be understood in casual conversation, it is considered informal in writing and…
Correct answer: plenty of miles- A. especially
- B. elderly
- C. with compromised
- D. immune systems
Explanation: This is incorrect. It should be "the elderly" to properly refer to older people as a group.
Correct answer: elderly- A. gave
- B. his wife and Jim another
- C. they
- D. be
Explanation: The error in the sentence is in option (B) "his wife and Jim another," which is corrected to "Jim and his wife another chance'' to improve…
Correct answer: his wife and Jim another- A. Impetus
- B. Jitney
- C. Lineage
- D. Bouquet
Explanation: The word that best fits in the blank is "bouquet."Bouquet refers to a bunch of flowers arranged together, which is commonly used for…
Correct answer: Bouquet- A. 14
- B. 16
- C. 18
- D. 24
Explanation: The given sequence is 2, 5, 9, ?, 20, 27. To find the missing term, first determine the differences between consecutive terms: 5 - 2 = 3…
Correct answer: 14- A. R
- B. U
- C. Q
- D. S
Explanation: To determine who is the husband of P, analyze the family structure:Q is a priest and the father of T, indicating he is married.O is the…
Correct answer: Q- A. If statement I is the cause and statement II is its effect;
- B. If statement Il is the cause and statement, I is its effect;
- C. If both the statements I and II are independent causes;
- D. If both the statements I and II are effects of independent causes;
- E. If both the statements I and II are effects of some common cause;
Explanation: Statement II indicates that the cost of production, maintenance, and distribution of LPG has increased by 10%.
Correct answer: If statement Il is the cause and statement, I is its effect;