12th Zoology - Book Back Answers - Chapter 8 - English Medium Guides ~ Kalvi Tips

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Tamil Nadu Board 12th Standard Zoology - Chapter 8: Book Back Answers and Solutions

This post covers the book back answers and solutions for Chapter 8 – Zoology from the Tamil Nadu State Board 12th 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 Chapter 8 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 12 students! Prepare well and aim for top scores. Thank you!

Chapter 8: Immunology

I. Multiple Choice Questions

1. Colostrum provides
a) Naturally acquired active immunity
b) Naturally acquired passive immunity
c) Artificially acquired active immunity
d) Artificially acquired passive immunity

Answer Key:

b) Naturally acquired passive immunity

2. Paratope is an
(a) Antibody binding site on variable regions
(b) Antibody binding site on heavy regions
(c) Antigen binding site on variable regions
(d) Antigen binding site on heavy regions

Answer Key:

3. Allergy involves
a) IgE

b) IgG
c) lgA

d) IgM

Answer Key:

a) IgE

4. Anaphylactic shock is due to
(a) Allergic reaction
(b) Secretion of toxins
(c) Secretion of histamines
(d) All the above

Answer Key:

(a) Allergic reaction

5. Spread of cancerous cells to distant sites is termed as
(a) Metastasis
(b) Oncogenes
(c) Proto-oncogenes
(d) Malignant neoplasm

Answer Key:

(a) Metastasis

6. AIDS virus has
(a) Single stranded RNA
(b) Double stranded RNA
(c) Single stranded DNA
(d) Double stranded DNA

Answer Key:

(a) Single stranded RNA

7. All are peripheral lymphoid organs except
(a) Lymph nodes
(b) Spleen
(c) Mucosa associated lymphoid tissue
(d) Thymus

Answer Key:

(d) Thymus

8. Which is a macrophage?
(a) Monocyte

(b) Erythrocyte
(c) Thrombocyte

(d) Lymphocyte

Answer Key:

(a) Monocyte

9. True about interferon is that
(a) It is synthetic antiviral agent
(b) It inhibits viral replication in cells
(c) It is specific for a particular virus
(d) It causes infection

Answer Key:

(a) It is synthetic antiviral agent

10. Cell mediated immunity is carried out by………….. while humoral immunity is mainly carried out by
(a) B cells/T cells
(b) Epitopes/antigens
(c) T cells/B cells
(d) antibodies/antigens

Answer Key:

11. B Cells are activated by
(a) Complement
(b) Antibody
(c) Interferon
(d) Antigen

Answer Key:

(d) Antigen

12. In agglutination and precipitation reactions, the antigen is a ______________ and ____________ respectively
(a) Whole cell/soluble molecule
(b) Soluble molecule/whole cell
(c) Bacterium/virus
(d) Protein/Antibody

Answer Key:

(a) Whole cell/soluble molecule

13. B cells that produce and release large amounts of antibody are called
(a) Memory cells

(b) Basophils
(c) Plasma cells

(d) killer cells

Answer Key:

14. Raja is injured and got swelling. The swelling is due to the infection of tissue is an example of
(a) Mechanical barrier
(b) Physiological barrier
(c) Phagocytosis
(d) Inflammation

Answer Key:

(d) Inflammation

II. Short answer questions

12th bio zoolgy

III. Long answer questions

12th bio zology