Jharkhand Biology Model Question Paper : Plus Two / 12th Std / +2 www.jac.nic.in

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Document Described : Biology Question Paper, Jharkhand Question Paper

BIOLOGY
(Optional)
Total Full Marks : 70
Total Pass Marks : 23
Time : 3 Hours

SECTION : A
(Botany)
Full Marks : 35
Pass Marks : 11 1

http://jac.nic.in/model_questions.htm
http://jac.nic.in/pdf/model_question...ology12_08.pdf

Candidates are required to give their answers in their own words as far as practicable.
Figures in the margin indicate ful marks.
The candidates are required to write both Group number and Question number with every answer.

Instructions :
This question paper consists of four Groups,
i.e., A, B, C and D. All Groups are compulsory. Group ? A 1×3=3
1. The first stable product of C4 pathway of Photosynthesis is:
(a) 3-Phosphoglyceric acid
(b) Oxaloacetic acid
(c) Malic acid.
2. The development of fruit without act of fertili- zation is caled:
(a) Parthenocarpy
(b) Parthenogenesis
(c) Apomixis.
3. Miorrhiza is responsible for the nutrition of:
(a) Potassium
(b) Copper
(c) Zinc
(d) Phosphorus.
4. Write the formula of Chlorophyl-A.
5. Name two CAM plants.
6. Agent Orange consists of which two hormones ?
7. Define ?keystone species?.
8. What is double-fertilization ?

Group : C 3×4=12
9. What is ?Water Bloom? ?
10. What is photorespiration ?
11. What is respiratory quotient ?
12. What are il efects of air-polution ?

Group : D 5×2 =10
13. Explain how increase in organic waste in ponds leads to increase in Biological Oxygen Demand (B.O.D).
14. Give a schematic representation of C4 cycle
(no description required) and enumerate its significance.

SECTION : B
(Zoology)
Full Marks : 35
Pass Marks : 11 1

Candidates are required to give their answers in their own words as far as practicable.
Figures in the margin indicate ful marks. The candidates are required to write both Group number and Question number with every answer.
Instructions :
This question paper consists of four Groups, i.e., A, B, C and D. All Groups are compulsory.

Group : A 1×3=3
1. Tick fever is caused due to the species of
2. The secretion of intestine is called as
.3. ?Diabetes incipidus? is caused due to deficiency of hormone.

GrouP : B 2×5=10
4. What are ?miceles? ?
5. What do you mean by ?Arteriosclerosis? ?
6. What is the difference between ?auxetic? and ?multiplicative growth? ?
7. ?Minimata disease? first reported was due to the consumption of where water body was contaminated with .
8. State the ful forms of MRI and NMR.

Group : C 3×4=12
9. What are the diferent phases of menstrual cycle ?
10. What is BOD and COD ? State their signi- ficance.
11. What is Saltatory effect ? Which type of neurons show this efect ?
12. Differentiate between Osmoregulator and Osmoconformer.

Group : D 5×2 =10
13. Draw the structure of a typical nephron.
Explain how filtration of blood takes place in nephron.
14. What do you mean by population ? Explain how different factors are influencing the human population growth rate ?