11th Zoology - Book Back Answers - Unit 5 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 5: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 5 – Zoology from the Tamil Nadu State Board 11th Standard Zoology textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

    We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

    By going through this material, you’ll gain a strong understanding of Zoology  Unit 5 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

• 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following 
• 2 Mark Questions: Answer briefly 
• 3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 11 students! Prepare well and aim for top scores. Thank you!

Unit 5 : Digestion And Absorption

I. Multiple Choice Questions

1. Choose the incorrect sentence from the following:
a. Bile juice emulsifies the fat.
b. Chyme is a digestive acidic food in stomach.
c. Pancreatic juice converts lipid into fatty acid and glycerol.
d. Enterokinase stimulates the secretion of pancreatic juice.
Answer Key:
d. Enterokinase stimulates the secretion of pancreatic juice.

2. What is chyme....?
a. The process of conversion of fat into small droplets.
b. The process of conversion of micelles substances of glycerol into fatty droplet.
c. The process of preparation of incompletely digested acidic food through gastric juice.
d.The process of preparation of completely digested liquid food in midgut.
Answer Key:
c. The process of preparation of incompletely digested acidic food through gastric juice.

3. Which of the following hormones stimulate the production of pancreatic juice and bicarbonate?
a. Angiotensin and epinephrine
b. Gastrin and insulin
c. Cholecystokinin and secretin
d. Insulin and glucagon
Answer Key:
c. Cholecystokinin and secretin

4. The sphincter of Oddi guards
a. Hepatopancreatic duct
b. Common bile duct
c. Pancreatic duct
d. Cystic duct
Answer Key:
a. Hepatopancreatic duct

5. In small intestine, active absorption occurs in case of
a. Glucose
b. Amino acids
c. Na+
d. All the above
Answer Key:
c. Na+

6. Which one is incorrectly matched?
a. Pepsin stomach
b. Renin- liver
c. Trypsin intestine
d. Ptyalin mouth
Answer Key:
b. Renin- liver

7. Absorption of glycerol, fatty acids and monoglycerides takes place by
a. Lymph vessels within villi
b. Walls of stomach
c. Colon
d. Capillaries within villi
Answer Key:
a. Lymph vessels within villi

8. First step in digestion of fat is
a. Emulsification
b. Enzyme action
c. Absorption by lacteals
d. Storage in adipose tissue
Answer Key:
a. Emulsification

9. Enterokinase takes part in the conversion of
a. Pepsinogen into pepsin
b. Trypsinogen into trypsin
c. Protein into polypeptide
c. Protein into polypetide
d. Caseinogen into casein
Answer Key:
b. Trypsinogen into trypsin

 

10.Which of the following combinations are not correctly matched?

a. Vitamin D    -     Rickets

b. Thiamine     -     Beriberi

c.Vitamin K     -     Sterility

d.Niacin          -      Pellgra

Answer Key:

c.Vitamin K        -     Sterility

11. Which of the following combinations are not correctly matched?
Column I                                    Column II
a. Bilirubin and biliverdin        (i) Intestinal juice
b. Hydrolysis of starch             (ii) Amylases
c. Digestion of fat                    (iii) Lipases
d. Salivary gland                      (iv) Parotid
Answer Key:
a. Bilirubin and biliverdin    (i) Intestinal juice

12. Match column I with column II and choose the correct option
Column – I                Column - II
(P) Small intestine        (i) Largest factory
(Q) Pancreas                (ii) Absorption of Water
(R) Liver                     (iii) Carrying electrolytic solution
(S) Colon                     (iv) Digestion and
a. (P-iv) (Q-iii) (R-i) (S-ii)
b. (P-iii) (Q-ii) (R-i) (S-iv)
c. (P-iv) (Q-iii) (R-ii) (S-i)
d. (P-ii) (Q-iv) (R-iii) (S-i)
Answer Key:
a. (P-iv) (Q-iii) (R-i) (S-ii)

13. Match column I with column II and choose the correct option
Column – I                Column - II -
(P) Small intestine          (i) 23 cm
(Q) Large intestine        (ii) 4 meter
(R) Oesophagus             (iii) 12.5 cm
(S) Pharynx                    (iv) 1.5 meter
a. (P-iv) (Q-ii) (R-i) (S-iii)
b. (P-ii) (Q-iv) (R-i) (S-iii)
c. (P-i) (Q-iii) (R-ii) (S-iv)
d. (P-iii) (Q-i) (R-ii) (S-iv)
Answer Key:
b. (P-ii) (Q-iv) (R-i) (S-iii)

14. Match column I with column II and choose the correct option
Column – I            Column - II
(P) Lipase            (i) Starch
 (Q) Pepsin          (ii) Cassein
(R) Renin            (iii) Protein
(S) Ptyalin           (iv) Lipid
a. (P-iv) (Q-ii) (R-i) (S-iii)
b. (P-iii) (Q-iv) (R-ii) (S-i)
c. (P-iv) (Q-iii) (R-ii) (S-i)
d. (P-iii) (Q-ii) (R-iv) (S-i)
Answer Key:
c. (P-iv) (Q-iii) (R-ii) (S-i)

15. Which of the following is not the function of liver?
a. Production of insulin
b. Detoxification
c. Storage of glycogen
d. Production of bile
Answer Key:
a. Production of insulin

16. Assertion (A): Large intestine also shows the presence of villi like small intestine.
Reason (B): Absorption of water takes place in large intestine.
a. Both A and B are true and B is the correct explanation of A
b. Both A and B are true but B is not the correct explanation of A
c. A is true but B is false
d. A is false but B is true
Answer Key:
d. A is false but B is true

17. Which of the following is not true regarding intestinal villi?
a. They possess microvilli.
b. They increase the surface area.
c. They are supplied with capillaries and the lacteal vessels.
d. They only participate in digestion of fats.
Answer Key:
d. They only participate in digestion of fats.

 

II. Short answer questions

a

III. Long answer questions

a

IV. Exercise

a