Chapter Exam

Chapter 5: Digestion and Absorption — Online MCQ Test

Q: Which of the following parts of the alimentary canal is the primary site for the absorption of nutrients?

Answer: B. Small intestine — The small intestine, specifically the jejunum and ileum, is the primary site for the absorption of digested food molecules.

Q: Which enzyme is responsible for the digestion of starch in the oral cavity?

Answer: A. Salivary amylase — Salivary amylase (ptyalin) present in the saliva initiates the chemical digestion of carbohydrates by breaking down starch into maltose.

Q: The wave-like muscular contractions that push food through the alimentary canal are called:

Answer: B. Peristalsis — Peristalsis is the series of involuntary muscle contractions that move the bolus through the oesophagus and intestines.

Q: Which of the following accurately describes the order of layers in the wall of the alimentary canal from outside to inside?

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).

Q: Which of the following correctly pairs a substrate with its corresponding final end-product after complete digestion?

Answer: A. Protein - Amino acids — Proteins are broken down by various proteases into their monomeric units, which are amino acids.

ZOOLOGY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 5: Digestion and Absorption with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th ZOOLOGY. 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.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 5: Digestion and Absorption — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th ZOOLOGY — Chapter 5: Digestion and Absorption, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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.

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.

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).

Which of the following correctly pairs a substrate with its corresponding final end-product after complete digestion?