Biology Sample Question Paper Sheet - Class Xii, Central Board Of Secondary Education, 2010 Page 16
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39(5)
Given below are pairs of disease and causative organism. Which out of these is not a matching pair
and why?
2 Filariasis
:
Wuchereria
Ringworm
:
Ascaris
AIDS
:
Human immuno virus
Malaria
:
Plasmodium
(6)
In the picture provided, what is the relationship between (1) and (2) with respect to population
interaction and between (3) and (4) with respect to trophic levels.
(7)
Provide one word or one sentence information about ‘plasmid’ with respect to its (i) chemical
nature and (ii) its duplication.
(8)
Expand the following (i) PCR (ii) Bt
SECTION -B
(9)
In the adjacent population growth curve, (i) What is the status of
food and space in the curves (a) and (b)? (ii) In the absence of the
predators, which curve (a) or (b) would appropriately depict the
prey population?
(10) Given below is a sequence of steps of transcription in a eukaryotic cell.
Fill up the blanks (1, 2, 3, 4) left in the sequence.
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