BIOLOGY— 2003 (Set II—Compartment Delhi)
Note: Except for the following questions, all the remaining questions have been asked in Set I.
SECIION - A
Q. Nos. 1-8 are of very short answer type carrying I mark each. Of these the first five questions are of multiple choke type which have to be answered simply as A, B, C or D. The remaining questions have lobe answered in approximately 1—20 words each.
Q. 2. A girl has the blood group A. What is true of the inberitance of this blood group in her case?
Q. 3. An example of a dioecious plant is
Q. 4. Oozing of semisolid material in the throat which develops into a tough membrane causing choking of the air passage often leading to the death of the baby, are symptoms of
Q. 5. Pick out the false statement pertaining to acromegaly.
Q. 7. Glomerular filtrate has water, glucose, amino acids and creatinine. Which of them are rapidly reabsorbed actively by blood?
SECTION - B
Q. Nos. 9-18 are of short answer type carrying 2 marks each. Answer them in 20-30 words each.
Q. 9. Mention the unusual function performed by
Q. 16. Explain any four cellular changes that occur in human beings with ageing.
Q. 18. How and why is electroporation done in E. coil?
SECTION - D
Q. Nos. 28-30 are long answer type c 5 marks each. Q. Nos. 29 and 30 have internal choke. . Answer these questions in approximately 80-120 words each.
Q. 29. (a) Draw an electron-microscopic view of a mammalian sperm. Label any six internal structures of the sperm.
Q. 30. Illustrated below is a DNA segment which constitutes a gene:
(a) Will the whole gene be transcribed into RNA primarily? State “yes” or “no”.
Biology 2003 Question Papers Class XII
CBSE 2003 Question Papers Class XII