CBSE Board Class 11 Biology Sample Papers 2011

Sample Paper – 2011
Class – XI
Subject – Biology


1. what is heterocysts give eg.

2. write  the florarl formula for liliaceae.

3. draw graph for effect of change of substarate on enzyme activity.

4. NAME ONE PGR WHICH IS WWIDELY USED IN FEILD OF AGRICULTURE.

5. EXPAND SAN AND AVN

6. WHO IS THE FINAL ACEPTOR OF HYDROGEN IN ETS

7. DIFFRENCE B/W CYTOKINESIS AND KARYOKINESIS

8. NAME ONE CELL PRESENT IN GASTRIC GLAND AND WHAT DOE IT SECRETE.
     OR
WHAT IS FUNCTION OF GOBLET CELLS.

9. WRITE FOUR FEATURES OF CNIDARIA.

10. DRAW THE LIFE CYCLE FOR HAPLO-DIPLONTIC CYCLE.

11. DRAW THE REPRODUCTIVE SYSTEM OF EARTHWORM

12. WRITE SHORT NOTE ON REGION OF ROOTS.

13. GIVE  THE CLASSIFICATION AND NOMECLATURE OF ENZYMES.
   OR
DEFINE
A. CO-FACTORS.
B. GYCOSIDIC BOND.

14. HOW DOES THE POSITION OF CENTROMERE FROM THE BASIS OF CLASSIFICATION OF CHROMOSOME

15. GIVE THE SCHTEMATIC REPRESENTATION OF SEQUENCE OF DEVELOPMENT PROCESS IN PLANT CELL.

16. WRITE A SHORT NOTE ON LEG- HAEMOGLOBIN.

17. WHAT ARE CASPARIAN STRIPS AND GIVE ITS FUNCTION.

18/ GIVE THE DIGRAMATIC REPRESENTATION OF MECHANISM OF HORMONE ACTION IN
    A. STERIOD HORMONES.

19.  EXPLAIN THE MECHANISM OF SYNAPTIC TRANSMISSION WITH THE HELP OF DIGRAM.

20. EXPLAIN HOW ATP MOLECULES ARE SYNTHESISED THROUGH CHEMIOSMOTIC HYPOTHESIS

21. DESCRIBE THE MECHANISM  OF SLIDING FILAMENT THEORY.

22. EXPLAIN THE PHASES OF CELL CYCLE EITH THE HELP OF DIGRAM

23. WITH THE HELP OF LABLED DIGRAM EXPLAIN COUNTER CURRENT MECHANIM.
    OR A. WHAT IS SIGNIFICANCE OF JGA IN KIDNEY FUNCTION
       B. EXPAND ANF .WHAT IS ITS FUNCTION.

24. DESCRIBE THE ARRANGEMENT OF FLORAL MEMBERS IN RELATION TO THEIR  INSERTION ON THALMUS.

25. DEFINE N EXPAND THE TERMS
A. FRC
B. VC
C. ERV

26 A WHAT DOES ALGAL BLOOM N RED TIDES SIGNIFY
  B. DRAW STRUCUTE OF BACTERIOPHAGE.

27. ANSWER BRIEFLY
A. HOW BILE HELPS IN DIGESTION OF FATS.
B. HOW DOES PEPSINOGEN CHANGES INTO ACTIVE FORM
C. WHAT IS CHYME.


28. EXPLAIN AND GIVE DIGRAMTIC REPRESENATION OF HATCH AND  SLACK PATHWAY
    OR
EXPLAIN TCA CYCLE IN DETAIL

29.  EXPLAIN MEOSIS I IN DETAILS . WRITE SIGNIFICANCE OF MEOSIS

30. EXPLAIN THE PROCESS OF SECONDARY GROWTH IN A DICOT STEM WITH THE HELP OF DIGRAM . WHAT IS ITS SIGNIFICANCE.
    OR
DRAW THE LABBELLED DIGRAM FOR
A. ALIMENTARY CANAL OF COACKROACH
B. FEMALE REPRODUCTIVE SYSTEM OF FROG......