Chapter 5: Digestion and Absorption — Online MCQ Test
ZOOLOGY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 5: Digestion and Absorption with a free chapter-wise online MCQ test.
This chapter covers: This chapter details human digestive system anatomy alimentary canal histology and digestive enzyme functions. Students study carbohydrate protein fat digestion absorption mechanis....
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Chapter 5: Digestion and Absorption — Important Questions & Answers
Which of the following parts of the alimentary canal is the primary site for the absorption of nutrients?
- A. Stomach
- B. Small intestine
- C. Large intestine
- D. Oesophagus
Answer: B. Small intestine
The small intestine, specifically the jejunum and ileum, is the primary site for the absorption of digested food molecules.
The small intestine, specifically the jejunum and ileum, is the primary site for the absorption of digested food molecules.
Which enzyme is responsible for the digestion of starch in the oral cavity?
- A. Salivary amylase
- B. Pepsin
- C. Lipase
- D. Trypsin
Answer: A. Salivary amylase
Salivary amylase (ptyalin) present in the saliva initiates the chemical digestion of carbohydrates by breaking down starch into maltose.
Salivary amylase (ptyalin) present in the saliva initiates the chemical digestion of carbohydrates by breaking down starch into maltose.
The wave-like muscular contractions that push food through the alimentary canal are called:
- A. Deglutition
- B. Peristalsis
- C. Emulsification
- D. Absorption
Answer: B. Peristalsis
Peristalsis is the series of involuntary muscle contractions that move the bolus through the oesophagus and intestines.
Peristalsis is the series of involuntary muscle contractions that move the bolus through the oesophagus and intestines.
Which of the following accurately describes the order of layers in the wall of the alimentary canal from outside to inside?
- A. Serosa, Muscularis, Sub-mucosa, Mucosa
- B. Mucosa, Sub-mucosa, Muscularis, Serosa
- C. Serosa, Sub-mucosa, Muscularis, Mucosa
- D. Muscularis, Serosa, Mucosa, Sub-mucosa
Answer: A. Serosa, Muscularis, Sub-mucosa, Mucosa
The histological structure of the alimentary canal wall consists of four layers: Serosa (outermost), Muscularis, Sub-mucosa, and Mucosa (innermost).
The histological structure of the alimentary canal wall consists of four layers: Serosa (outermost), Muscularis, Sub-mucosa, and Mucosa (innermost).
Which of the following correctly pairs a substrate with its corresponding final end-product after complete digestion?
- A. Protein - Amino acids
- B. Starch - Fructose
- C. Fat - Glucose
- D. Disaccharides - Fatty acids
Answer: A. Protein - Amino acids
Proteins are broken down by various proteases into their monomeric units, which are amino acids.
Proteins are broken down by various proteases into their monomeric units, which are amino acids.