12th BIOLOGY Question Bank: 12ஆம் வகுப்பு உயிரியல் பாடத்தில் உயர் மதிப்பெண்கள் பெறலாம்; இதோ மாதிரி வினாத்தாள்!

12th BIOLOGY Model Question Paper: இன்று உயிரியல் பாடத்துக்கான மாதிரி வினாத்தாளை இந்தக் கட்டுரையில் காணலாம்.

உயிரியல் பாடம்

தமிழ்நாடு முழுவதிலும் இருக்கும் அர்ப்பணிப்பு மிக்க அரசுப் பள்ளி ஆசிரியர்களைக் கொண்டு உருவாக்கிய பொதுத் தேர்வுக்கான 10, 12ஆம் வகுப்பு மாதிரி வினாத்தாள் வங்கியை ABP Nadu சார்பில் தினந்தோறும் வெளியிட்டு வருகிறோம்.

அந்த வகையில் இன்று உயிரியல் பாடத்துக்கான மாதிரி வினாத்தாளை இந்தக் கட்டுரையில் காணலாம்.

MODEL QUESTION PAPER -2023          BIOLOGY

Time Allowed : 2.30 Hours                                                                                              Maximum Marks : 70

PART - I (BIO-BOTANY)    (Marks : 35)

SECTION - I

               8x1=8

i) Answer all the questions.

ii) Choose the most appropriate answer from the given four alternatives and write the option code and the corresponding

1. In mature sieve elements, sometimes the pores in the sieve plate are blocked by a substance called :

  a) lignin (b)     suberin                 (c)     callose                 (d) callus

2.An antibiotic Bacitracin is obtained from :

• • • Streptomyces aureofaciens
    • Bacillus licheniformis
    • Streptomyces griseus
    • Bacillus subtilis

3. Match the following :
(1)     Camp and Gilly	(i)	Phylogenetic system
(2)     Carolus Linnaeus	(ii)	Biosystematics
(3)     Bentham and Hooker	(iii)	Artificial system
(4)     Engler and Prantl	(iv)	Natural system

(a)     (1) - (iv)     (2) - (ii)      (3) - (i)       (4) - (iii)

(b)     (1) - (i)       (2) - (iii)    (3) - (iv)     (4) - (ii)

(c)     (1) - (ii)      (2) - (iii)    (3) - (iv)     (4) - (i)

(d)     (1) - (iii)    (2) - (iv)     (3) - (ii)      (4) - (i)

4)  Plant treated with gibberellin shows sudden elongation of stem followed by flowering is called :

(a)     Richmond Lang Effect	(b)	Bud dormancy
(c)     Foolish seedling	(d)	Bolting

5) The biochemical mutants of         failed to synthesize certain amino acids.

• Aspergillus (b)     Neurospora

(c)     Oenothera                                        (d)     Penicillium

6) In Hevea brasiliensis, the leaves are :

• Sessile
• Palmately lobed
• Simple
• Trifoliately compound

7) The amino acid serine is formed in                        during C2 cycle.

(a) peroxisome (b)     mesophyll

(c)     chloroplast                                       (d)     mitochondria

8) The bacteria that is used in SCP production is :

(a) Bacillus (b)     Alkaligenes

(c)     E-coli                                               (d)     Streptomyces

 

SECTION - II

Answer any four questions.                                                                                                       4x2=8

9) What is hardening?

10) Define - Photorespiration.

11) What do you mean by recurrent parent ?

12)Write down the formula for measuring the actual growth in the length of a plant.

13) Plant tissue culture has become a major thrust area in plant biotechnology. Name the basic concepts involved in it.

14) Triticale is a hexaploid. How will you derive F1 hybrid from the following parent ?

 

SECTION – III

Answer any three of the following questions. Question No. 19 is compulsory.                                  3x3=9

15) Draw the floral diagram and write the floral formula of male flower of Ricinus communis.

(a)   What is splicing ?

(b)  Complete the following table of genetically engineered products 

Products                          Function

• Interferon                 -
• Interleukin                -
• Renin inhibitors        -

16) Write any three differences between cyclic and non-cyclic photophosphorylation.

17) Explain the experiment to demonstrate that oxygen is evolved during photosynthesis.

18) Identify the following from the diagram given below :

• Name the disease of the
• Give a note on the causative
• Its control measures.

SECTION - IV

Answer the following questions :                                                                                                                                                      2x5=10

19) 

• Write the outline classification of Bentham and  OR
• Explain the coupling aspect in Lathyrus

 

20)

 a) (i)   What is respiratory quotient ?   

     (ii)     Work out the respiratory quotient of a carbohydrate and that of anaerobic respiration.                       OR

b) Write the economic importance of the plant which is the chief source of

PART - II (BIO- ZOOLOGY)              (Marks : 35)

SECTION - I

Answer all the questions.                                                                                                              8x1=8

1. Which one of the following is not a true statement regarding innate immunity ?

• • Action of NK cells against virus injected cells
  • Production of antibodies by B-lymphocytes
  • Action of macrophages against pathogens
  • Release of chemical alarms at the site of inflammation                                                                                                                 2. Global warming is caused due to :
    • human activities against nature
    • extinction of animals and plants
    • lack of rainfall
    • presence of a hole in ozone layer

3)    Which one of the following is an auto immune disease ?

(a)     Myasthenia gravis	(b)	AIDS
(c)     Diabetes	(d)	Stroke

4)  our country, younger generation is more intelligent than parental and grand parental generations. This is due to constant use of brain with better development. This refers to :

• Law of use and disuse
• Over production
• Natural selection theory
• Inheritance of acquired characters

5. RBC diluting fluid is called :

(a) Hayem's solution (b)     Glucose solution

(c)     Turk's solution                                 (d)     Toisson solution

6)  Match the following :

1.  Plasmodium falciparum (i)      Causes Kala Azar

2. Leishmania donovani (ii)    Skin Leishmaniasis

3. Trypanosoma gambiens (iii)   Malignant Tertian

4. Leishmania tropica (iv)          Causes African Sleeping Sickness

(a)      (1) - (ii)          (2) - (iii)    (3) - (iv)     (4) - (i)

(b)     (1) - (iv)     (2) - (ii)      (3) - (i)       (4) - (iii)

(c)     (1) - (iii)    (2) - (i)       (3) - (iv)     (4) - (ii)

(d)     (1) - (iii)    (2) - (i)       (3) - (ii)      (4) - (iv)

7) Net filtration force which is responsible for the filtration in glomerulus is :

(a)     75 mm Hg                                       (b)     80 mm Hg

(c)     25 mm Hg                                       (d)     50 mm Hg

8) Total absence of plasma cell causes :

• Albinism (b)     Thalassemia

(c)     Agammaglobulinemia                    (d)     Sickle Cell Anemia

 

SECTION - II

Answer any four questions.                                                                                                 4x2=8

9) Thyrotoxicosis is always associated with weight loss. How ?

10) What are the symptoms of Cholera ?

11) Define - Anaphylaxis.

12) How will you identify a healthy cattle ?

13) Hardy-Weinberg equilibrium is applicable to large population only. Write its theoretical situations.

14) Write the international bio-diversity conservation strategies.

SECTION - III

Answer any three questions. Question number 19 is compulsory.                          3x3=9

• What are the deficiency diseases of vitamin A ?
• Name the vitamin responsible for the clotting of

17) Draw the diagram of Human Eye (V.S) and label the parts.

18) What are the main functions of antibodies ?

19) What are the effects of ozone depletion ?

20) In India, white leghorn breed of fowl is the most popular. Why ?

SECTION - IV

Answer the following questions :                                                                                        2x5=10

21. In our country, people are aware of communicable diseases. So they are not affected by them. But non-communicable diseases start emerging now. Hypertension is one of such How will you measure blood pressure and write the consequences of hypertension.

OR

In 2005, due to tsunami, most of the people died in our country. At the same time there was not much death in Nicobar islands. So, nature selected those tribes to survive. Explain how natural selection is the tool for evolution of new species ?

• Explain Bacterial

OR

Write an essay on Electrocardiogram.

மாதிரி வினாத்தாள் உருவாக்கம்

ஆசிரியர் அமர்நாத் (A3 குழு), 

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