HSC Biology Model Test-1st Paper -1

Class – XII

Subject : Biology 1st Paper 

Time : 3 hrs.                                                                                                                                       Marks. 75

Group -A

1.         a)         What is classification? Define different types of classification.                              1+4 =5

            b)         Classify Margulis classification.                                                                                           10

Or        a)         Write down the characteristics kingdom Monera.                                                               4

            b)         Write down the characteristics of Gymnospermae.                                                             4

            c)         Draw Penicillium.                                                                                                                   3

            d)         Write the name of fungi of the disease " Brown leaf spot" of rice. Give the structure

                        of that fungi.                                                                                                               1+3 =4

2.         a)         Discuss about dark phase of photosynthesis.                                                                                  10

            b)         Draw the transverse section of a dicot root                                                                         5

           

Or        a)         Discuss about prophase -1 of Meosis-1.                                                                              10

            b)         Write down the in complete oxidation of pyruvic acid.                                                        10

3.         a)         What is plant succession? Describe about hydrosere.                                            1+4=5

            b)         Discuss on N₂ -cycle.                                                                                                             4

            c)         Write down the exceptions of Medel's 1st law.                                                                    6

Or,       a)         Give a brief description of recombinant DNA Technology.                                                10

            b)         Write down the scientific name of the following plants__________.                                   5

                        (i)  Tobacco     (ii)  Chilli         (iii)  Gram        (iv) Cabbage   (v)  Asparagus.

Group - B

4.         Give the structure of Saceharomyces.                                                                                              5

Or        What is enzyme? Write down the characteristics of enzyme.                                              1 +4 =5

5.         Draw the longitudinal section of an ovule.                                                                            5

Or        Write down following definatians---

            (i)  Osmosis    (ii)   Vascular bandle    (iii)   Alternation of generation  (iv)  Stomatal

            transpiration.   (v)  Triple fusion.

6.         Give a short description on 9:7 ratio.

Or        What is Ecological pyramid? Describe about a pyramid of number.                                  1+4 =5

7.         Write down the internal differences between root & stem.                                                             5

Or,       Write down the differences between angiospermae & Gymnospermae.

8.         Classify different monosaccharide.                                                                                       5

Or,       classify different conjugated protein.

9.         Give the physical structure of DNA.                                                                                                5

Or,       Discuss about critical photoperiod.