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20th November 2014, 12:14 PM
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Join Date: Apr 2013
Re: CBSE 12th class Science question paper

Ok, as you want the question paper of Biology of CBSE 12th science so here I am providing you

CBSE 12th Science Biology question paper

1.Name the material used as matrix in gel-electrophoresis and mention its
role.

2. State one reason for adding blue-green algae to the agricultural soil.

3.Give one example each of a fungus which reproduces by :
(a) budding
(b) conidia

4.State one reason why breast-feeding the baby acts as a natural
contraceptive for the mother.

5.Identify and write the correct statement :
(a) In Grasshopper males two sex chromosomes are X and Y type.
(b) In Grasshopper males there exist XO type of sex-determinants.

6. What will happen if DNA replication is not followed by cell division in a
eukaryotic cell ?

7. Name the two gases contributing maximum to the green house effect.

8.Write the level of biodiversity represented by a mangrove. Give another
example falling in the same level.

9 ‘Fish mortality increases with influx of nutrients in a fresh-water body.’
Write two reasons. How will the influx of nutrients affect the BOD level
of this water body ?

10 Provide two reasons that make the count of prokaryotic species
difficult.

CBSE 12th Science Biology question paper




Half question paper is in pdf file atteched..........
Attached Files
File Type: pdf CBSE 12th Science Biology question paper.pdf (216.4 KB, 96 views)


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