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SAMPLE PAPER
BIOLOGY
SET-III
Time Allowed : 3 Hours
Maximum Marks : 70
General Instructions :
(i) All questions are compulsory.
(ii) Marks for each question are indicated against it.
(iii) Q. Nos. 1-11 are very short answer type carrying one
mark each only. answer them in one word one / one sentences.
(iv) Q. Nos. 12 - 23 are short answer questions carrying 2
marks each. It is appropriate to answer them in about 30-50 words.
(v) Q. Nos. 24-28 are short answer questions carrying 3
marks each.. It is appropriate to answer them in about 30-50 words.
(vi) Q. Nos. 29-32 are long answer questions carrying 5
marks each. It is appropriate to answer them in about 40-100 words.
(vii) Do not unnecessarily make the answers lengthier than
desired. |
| Q.1. |
Write the functions of lenticles. |
| Q.2. |
Who proposed the theory of inheritance of
acquired characters ? |
| Q.3. |
What is the full form of ACTH ? |
| Q.4. |
Write mendelian Dihybrid phenotypic ratio of F2
generation. |
| Q.5. |
Give an evidence that suggest gymnosperms have
descended from peridophytes. |
| Q.6. |
What signal the closure of stomata in certain
plants during severe drought ? |
| Q.7. |
Define photorespiration ? |
| Q.8. |
Name the chemical released by WBC's which
causes rise in temperature of human body when infected ? |
| Q.9. |
What is synapse ? Name any two neuro
transmitters involved at the synapse ? |
| Q.10. |
Define vestigeal organ. Give two
examples of vestigeal organs in human body ? |
| Q.11. |
Name any one human bacterial diseases.
give its biological name and one diagnotic features. |
| Q.12. |
How does the term fruit differ to a botanist
from that to a common man ? Give two example of (i) fruits in which seeds are edible (ii)
false fruit. |
| Q.13. |
Bile juice does not contain any enzyme yet it
is essential for digestion. Explain. |
| Q.14. |
Why are male Drosophila regarded as pure for a
gene which is located on X chromosome ? |
| Q.15. |
Give two differences between B - cells and T -
cells produced in human body. |
| Q.16. |
Why annual rings are comparatively more marked
in plants growing in hilly areas than those in coastal areas ? |
| Q.17. |
A woman with normal vision marries a man with
normal vision and they have a colour blind son. Her husband dies and she marries a
colour blind man. Show the type of children that might be expected from this
marriage and the portion of each ? |
| Q.18. |
Life originated from the earth's inorganic
atmosphere in the past but it no longer happens today. Give reasons. |
| Q.19. |
What is normal volume of blood in human adult
? State four functions of blood. |
| Q.20. |
How is the function of lac-operon different
from trytophan operon ? |
| Q.21. |
Who put forward the theory of natural
selection ? Give its four salient features. |
| Q.22. |
What are casparian strips ? Where are they
located ? What are their functions ? |
| Q.23. |
Name the scientist who tested the Oparin
: Haldane theory on the origin of life. How did he do it ? |
| Q.24. |
Population growth is determined by interaction
of biotic potential and environmental resistance. Comment on the statement. |
| Q.25. |
When a person is not particularly thirsty and
is made to drink lot of water his urine flow increases greatly and the urine is very
dilute ? Explain. |
| Q.26. |
Why are biofertilizers preferred to chemical
fertilizers ? Give three reasons. |
| Q.27. |
Draw a neat and labelled diagram of human eye. |
| Q.28. |
Draw a labelled sketch of LS of maize seed.
Describe its structure. |
| Q.29. |
Describe briefly the human male reproduction
system. Where are the matured sperm stored ? |
| Q.30. |
Describe the experiment performed by Hershey
and Chase to prove that DNA is genetic material. |
