जीव विज्ञान ( सैद्धान्तिक )
BIOLOGY (THEORY) PAPER
SOLUTIONS
SECTION A
ANS 1. (D) Agrobacterium.
ANS 2. (C) Memory.
OR
(A) Depressants.
ANS 3. (B) Sertoli cells.
ANS 4. (C) Using gene gun.
ANS 5. (C) Cryopreservation.
OR
(A) Action of UV rays on nascent oxygen.
ANS 2. (C) Memory.
OR
(A) Depressants.
ANS 3. (B) Sertoli cells.
ANS 4. (C) Using gene gun.
ANS 5. (C) Cryopreservation.
OR
(A) Action of UV rays on nascent oxygen.
SECTION B
ANS 6. TECHNIQUE - Artificial Hybridization.
Artificial Hybridization includes emasculation and bagging. As the flower contain only female reproductive part so it will undergo BAGGING only.
BAGGING - It is a process in which the flower is covered by a bag of butter paper to get rid of unwanted pollen landing on it.
ANS 7. (a) CAUSE - Due to the presence of one extra X chromosome in male, resulting in the karyotype XXY.
(b) 1) Development of breast in male (gynecomastia).
ANS 8. 1) It can be grown on large amount in bioreactors having nutritive medium.
2) It can be grown in large amount in waste water from potato processing plants.
ANS 9. EcoR1 is a restriction endonuclease which belong to nucleases. It will cut the DNA at specific sequence known as recognition sequence. Its recognition sequence is GAATTC. And it will cut the DNA between G AND A and produces sticky ends.
ANS 10. 1) Cyanobacteria( anabaena, nostoc,etc)-fix atmospheric nitrogen.
2) Azotobacter or azospirilium - Free living nitrogen fixers.
ANS 11. reasons are -
1) It shows that our ancestors are not like us. So organisms have shown evolution.
2) Fossil have shown how different organisms have been evolved. For example evolution of birds from reptiles is shown by archaeopteryx.
ANS 12. 1) SUMMER - in summer the human sweat. So it become cool when air start flowing as the sweat evaporates and hence causes cooling.
2) WINTER - in winter the human body shiver to produce heat for keeping the body temparature constant.
ALL ANSWERS ARE UPLOADED SOON.....
Artificial Hybridization includes emasculation and bagging. As the flower contain only female reproductive part so it will undergo BAGGING only.
BAGGING - It is a process in which the flower is covered by a bag of butter paper to get rid of unwanted pollen landing on it.
ANS 7. (a) CAUSE - Due to the presence of one extra X chromosome in male, resulting in the karyotype XXY.
(b) 1) Development of breast in male (gynecomastia).
2) Feminine pitch voice.
3) They can also be sterile.
ANS 8. 1) It can be grown on large amount in bioreactors having nutritive medium.
2) It can be grown in large amount in waste water from potato processing plants.
ANS 9. EcoR1 is a restriction endonuclease which belong to nucleases. It will cut the DNA at specific sequence known as recognition sequence. Its recognition sequence is GAATTC. And it will cut the DNA between G AND A and produces sticky ends.
ANS 10. 1) Cyanobacteria( anabaena, nostoc,etc)-fix atmospheric nitrogen.
2) Azotobacter or azospirilium - Free living nitrogen fixers.
ANS 11. reasons are -
1) It shows that our ancestors are not like us. So organisms have shown evolution.
2) Fossil have shown how different organisms have been evolved. For example evolution of birds from reptiles is shown by archaeopteryx.
ANS 12. 1) SUMMER - in summer the human sweat. So it become cool when air start flowing as the sweat evaporates and hence causes cooling.
2) WINTER - in winter the human body shiver to produce heat for keeping the body temparature constant.
ALL ANSWERS ARE UPLOADED SOON.....
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