AHSEC Class 12 Biology 2016 Question Paper [HS 2nd Year Biology Previous Year Question Paper]

Are you searching for the AHSEC Class 12 Biology Question Paper 2016? Look no further! This article provides a detailed analysis and HS 2nd Year Biology Question Paper 2016 under the Assam Higher Secondary Education Council (AHSEC) Now Assam State School Education Board (ASSEB). Assam Board Class 12 Biology Previous Year Question Paper For students preparing for board exams, previous year question papers are a crucial resource for understanding question patterns, marks distribution, and important topics.

2016

 BIOLOGY (Theory) 

Full Marks: 70

 Pass Marks: 21

 Time: Three hours 

The figures in the margin indicate full marks for the questions.

PART-I (BOTANY)

MARKS: 35

Instructions: Use separate Answer scripts for Part-I (Botany) and Part-II (Zoology).

1. Why grafting is not possible in Monocotyledonous plants? [1 Mark]

2. Name the unicellular fungi which reproduces asexually by budding. [1 Mark]

3. What were the raw materials used in Miller’s experiment? [1 Mark]

4. What is hidden hunger? [1 Mark]

5. (a) Define antigen and antibody. [2 Marks]

OR

(b) How is DNA isolated and purified from a bacterial cell? [2 Marks]

6. (a) Draw the L.S. of a pistil of angiosperms ready for fertilization. [2 Marks]

OR

(b) What are the cells present in a developed embryo sac of angiosperms? [2 Marks]

7. (a) What is polyploidy? Name the chemical used for its induction in plants. [2 Marks]

OR

(b) What are the merits of interspecific hybridization? [2 Marks]

8. (a) Name two antibiotics produced from bacteria along with the names of the concerned bacteria. [2 Marks]

OR

(b) Name the microbes used for the production of Acetic acid and Lactic acid. [2 Marks]

9. (a) How does light influence the growth and development in plants? [2 Marks]

OR

(b) What are the special characteristics of parasitic plants? [2 Marks]

10. Write a note on: (any one) [2 Marks] 

(a) Food Chain
(b) Trophic level

11. (a) Write the scientific names and their utility for the following plants:[(0.5+0.5)x3=3 Marks]

• Chinchona

• Neem

• Rauwolfia

OR

(b) Write the scientific names and their families for three important timber-yielding plants of Assam. [(0.5+0.5)x3=3 Marks]

12. (a) Explain the significance of mutation in evolution. [3 Marks]

OR

(b) Discuss the modern synthetic theory of evolution. [3 Marks]

13. (a) Discuss the major steps involved in gene cloning. [3 Marks]

OR

(b) State the basic steps involved in the genetic modification of an organism. [3 Marks]

14. (a) Why is the pond regarded as a good example of an ecosystem? Explain the path of energy flow in the pond ecosystem. [5 Marks]

OR

(b) Although sexual reproduction is a long, complex process compared to asexual reproduction, most angiospermic plants prefer it. Explain why. [5 Marks]

15. (a) Discuss the development of a 3-celled pollen grain from a microspore mother cell with the help of a labeled diagram. [5 Marks]

OR

(b) What is an ecological pyramid? Explain the different types of ecological pyramids with necessary diagrams. [5 Marks]

---

PART-II (ZOOLOGY)

MARKS: 35

1. Fill in the blanks: (any two) [1x2=2 Marks] 

(a) Silkworms belong to the order _______.
(b) The milk of 'Rosie,' the first transgenic cow, contains human alpha ________.
(c) The structure which provides connection between the developing fetus and the uterus of the mother is called ________.
(d) Acrosome of sperm is formed from ________.

2. Answer any two: [1x2=2 Marks] 

(a) Express the genotype of the AB blood group.
(b) What is an algal bloom?
(c) Write the equation of the 'Species-Area' relationship on a logarithmic scale.
(d) Write the scientific name of water hyacinth.

3. Write answers to any four of the following: [2x4=8 Marks] 

(a) Explain the chromosomal theory of inheritance.
(b) What is Leydig cell? State its function.
(c) Write a note on sickle cell anemia.
(d) State four features of genetic material.
(e) What are the barriers to innate immunity?
(f) Write the names of two primary and two secondary host plants of muga silkworm.

4. State the differences between: (any two) [2x2=4 Marks] 

(a) Sex chromosome and autosome
(b) T lymphocyte and B lymphocyte
(c) Grazing food chain and detritus food chain
(d) Follicular phase and luteal phase of the menstrual cycle.

5. (a) Draw and label the internal structure of the seminiferous tubule. [3 Marks]

OR

(b) Write briefly on the prevention of AIDS. [3 Marks]

6. (a) What do you understand by fishery? State its importance. [3 Marks]

OR

(b) What are the consequences of the loss of biodiversity? [3 Marks]

7. (a) Write Mendel's laws of inheritance. [3 Marks]

OR

(b) Explain incomplete dominance with an example. [3 Marks]

8. (a) How does a healthy person acquire pneumonia? What are the causative organisms of the disease? State the symptoms of pneumonia. [5 Marks]

OR

(b) Discuss the various means of prevention and control of drug and alcohol abuse. [5 Marks]

9. (a) Discuss the methodologies involved in the Human Genome Project. [5 Marks]

OR

(b) Discuss the process of translation of the genetic code. [5 Marks]

-000-

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