Biology 1st Paper Model Question for Class XII

Biology 1st Paper Model Question for Class XII

                                                             Time : 3 hours. Marks.75

Group _ A Broad Questions

1.         a.  Write down the characteristics of kingdom -Planate.                                                             5

            b.  Describe about Scalariform conjugation of Spirogyra.                                                                       10

            Or,

            a.  Describe about Natural system of Classification.                                                                               10

            b.  Write down the importances of Bacteria.                                                                                          5

2.         a.  Describe about Phophase -1 of Meiosis-1.                                                                                       10

            b.  What is cell -cycle ?                                                                                                                         3

            c.  Write down the difference between Metaphase - 2 of meiosis -2 & metaphase          of  mitosis.        2

            Or,

            a.  Describe about sporophytic stage of Fern.                                                                            10

            b.  Describe about life-cycle of yeast.                                                                                        5

3.         a.  Describe about different types of Complex tissue.                                                                 5

            b.  Describe about different types of vascular tissue system.                                                       6

            c.  Write down the characteristics of meristematic tissue.                                                                        3

            Or,

            a.  Describe about Krebs ' cycle.                                                                                                          10

            b.  What is called respiratory quotient (R.Q.) ?                                                                          2

            c.  Write down the significances of fertilization.                                                                          3

Group -B (Short Questions)

4.         Give the structure of yeast.

            Or,

            Give the structure of E. Coli

5.         Write down the formation of lenticels.                                                                                        5

            Or,

            Draw the tissue system of internal primary growth of monocot stem.                                           5

           

6.         Write down the incomplete oxidation of pyruvic acid.                                                                5

            Or,

            Describe Calvin Cycle.                                                                                                              5

7.         Give the classification of protein.                                                                                                5

            Or,

            Give the classification of enzyme.

8.         Write down one scientific name with importance of each group of plant-                                     5

            a.  Pulse yielding plant.

            b.  Oil yielding plant.

            c.  Medicine Producing plant.

            d.  Timber yielding plant.

            e.  Fruit Yielding plant.

Or,       Define following terms -

            a.  Co-enzyme

            b.  Nucleoside

            c.  Parthenogenesis

            d.  Apospary

            e.  Triple fusion.

9.         Give the structure of a standard Ovule.                                                                                     

Or,       Write down the characteristics of Sotanaceae Family with figure.                                                     5