Digestion and Absorption Practice Questions
NEET · Biology · 981 free MCQs with instant results and detailed explanations.
981
Total
196
Easy
432
Medium
353
Hard
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Topics in Digestion and Absorption
Digestive Glands
189
Digestion Process
189
Disorders of Digestive System
208
Alimentary Canal
195
Absorption
200
Sample Questions from Digestion and Absorption
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary function of the stomach in the alimentary canal?
A.
Absorption of nutrients
B.
Mechanical and chemical digestion
C.
Production of bile
D.
Water reabsorption
Show Answer & Explanation
Correct Answer: B
The stomach is primarily responsible for the mechanical and chemical digestion of food through muscular contractions and gastric juices.
Q2
Easy
Which part of the alimentary canal is primarily responsible for nutrient absorption?
A.
Stomach
B.
Esophagus
C.
Small intestine
D.
Large intestine
Show Answer & Explanation
Correct Answer: C
The small intestine is designed for the absorption of nutrients from food, aided by its large surface area.
Q3
Easy
Which enzyme begins the digestion of carbohydrates in the alimentary canal?
A.
Lipase
B.
Amylase
C.
Pepsin
D.
Trypsin
Show Answer & Explanation
Correct Answer: B
Amylase is the enzyme that starts the breakdown of carbohydrates into simpler sugars in the mouth.
Q4
Medium
What is the primary function of the small intestine in the human digestive system?
A.
Mechanical breakdown of food
B.
Absorption of nutrients
C.
Production of bile
D.
Storage of food
Show Answer & Explanation
Correct Answer: B
The small intestine is primarily responsible for the absorption of nutrients from digested food into the bloodstream, making option B the correct answer.
Q5
Medium
Which of the following enzymes is secreted by the salivary glands during the digestive process?
A.
Pepsin
B.
Amylase
C.
Lipase
D.
Trypsin
Show Answer & Explanation
Correct Answer: B
Salivary glands secrete amylase, which begins the digestion of carbohydrates in the mouth, making option B the correct choice.
Q6
Medium
Which structure prevents the backflow of food from the stomach into the esophagus?
A.
Pyloric sphincter
B.
Ileocecal valve
C.
Lower esophageal sphincter
D.
Anal sphincter
Show Answer & Explanation
Correct Answer: C
The lower esophageal sphincter prevents the backflow of food and gastric contents from the stomach into the esophagus, making option C the correct choice.
Q7
Medium
What is the role of bile in digestion?
A.
Digestion of carbohydrates
B.
Emulsification of fats
C.
Protein digestion
D.
Absorption of vitamins
Show Answer & Explanation
Correct Answer: B
Bile aids in the emulsification of fats, making them more accessible for enzymatic digestion, so option B is the correct answer.
Q8
Hard
Which of the following correctly describes the role of bile in digestion?
A.
Bile emulsifies fats, increasing the surface area for lipase action.
B.
Bile hydrolyzes proteins into amino acids.
C.
Bile neutralizes gastric acid in the small intestine.
D.
Bile absorbs monosaccharides directly into the bloodstream.
Show Answer & Explanation
Correct Answer: A
Bile emulsifies fats, which increases the surface area for lipase action, facilitating fat digestion.
Q9
Hard
During which phase of digestion does the secretion of gastric juice primarily occur?
A.
Cephalic phase
B.
Gastric phase
C.
Intestinal phase
D.
Mouth phase
Show Answer & Explanation
Correct Answer: B
The gastric phase is when gastric juice secretion increases due to the presence of food in the stomach, primarily stimulated by distension and the presence of proteins.
Q10
Hard
What is the primary function of the small intestine's villi?
A.
Secretion of digestive enzymes
B.
Absorption of nutrients
C.
Production of bile
D.
Regulation of pH levels
Show Answer & Explanation
Correct Answer: B
The primary function of the villi in the small intestine is to increase the surface area for absorption of nutrients into the bloodstream.
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Digestion and Absorption — NEET Biology Practice Questions Online
This page contains 981 practice MCQs for the chapter Digestion and Absorption in NEET Biology. The questions are organized by difficulty — 196 easy, 432 medium, 353 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.