11-17-2022, 12:27 PM
CBSE +2 Biotechnology official sample question paper with answer key for CBSE class 12 Board exam 2023 can be had from the links below.
Some sample questions from CBSE XII th Biotechnology Model Paper 2023 are:
1. Proteome of a given cell is dynamic because :
(a)Â Â Â In response to Internal and external changes, the biochemical machinery of the
cell could be changed.
(b)Â Â Â In response to Internal and external changes, the biochemical machinery of the
cell could not be changed.
©Â Â Â No direct relationship exists between Internal and external changes in the
biochemical machinery of the cell.
(d)Â Â Â Indirect relationship exists between Internal and external in changes the
biochemical machinery of the cell.
2. X is a valuable tool in plant breeding, wherein variation in tissue culture regenerated
plants from somatic cells can be used for the development of crops with novel traits.
Identify ‘X’. State any one example where this tool can be used for crop improvement.
3. Leaf explants of brinjal are showing multiple shoot regeneration in a plant tissue culture laboratory. Which plant regeneration pathway is depicted here? In this process, what would happen if either auxins or cytokinins are high in the medium?
4. Bioinformatics databases provide resources for gene level sequences such as RefSeq,
Homologene , Paralogs and UniGene and BLAST . Which of these would you use
as most suitable starting point for:
i)Â Â Â Avoiding redundancy in EST data.
ii)Â Â Â For inferring relations among organisms.
iii)Â Â Â Information retrieved from this resource will be used in designing gene chips.
5. (a)Â Â Â Differentiate between-
(i)Â Â Â Defined and Serum-supplemented medium
(ii)Â Â Â Anchorage-dependent and Anchorage-independent cells
(b)Â Â Â Explain how pH is maintained in animal cell cultures. Mention two advantages
of maintaining pH during such cultures.
Detailed +2 Biotechnology question paper can be had from the below link.
Some sample questions from CBSE XII th Biotechnology Model Paper 2023 are:
1. Proteome of a given cell is dynamic because :
(a)Â Â Â In response to Internal and external changes, the biochemical machinery of the
cell could be changed.
(b)Â Â Â In response to Internal and external changes, the biochemical machinery of the
cell could not be changed.
©Â Â Â No direct relationship exists between Internal and external changes in the
biochemical machinery of the cell.
(d)Â Â Â Indirect relationship exists between Internal and external in changes the
biochemical machinery of the cell.
2. X is a valuable tool in plant breeding, wherein variation in tissue culture regenerated
plants from somatic cells can be used for the development of crops with novel traits.
Identify ‘X’. State any one example where this tool can be used for crop improvement.
3. Leaf explants of brinjal are showing multiple shoot regeneration in a plant tissue culture laboratory. Which plant regeneration pathway is depicted here? In this process, what would happen if either auxins or cytokinins are high in the medium?
4. Bioinformatics databases provide resources for gene level sequences such as RefSeq,
Homologene , Paralogs and UniGene and BLAST . Which of these would you use
as most suitable starting point for:
i)Â Â Â Avoiding redundancy in EST data.
ii)Â Â Â For inferring relations among organisms.
iii)Â Â Â Information retrieved from this resource will be used in designing gene chips.
5. (a)Â Â Â Differentiate between-
(i)Â Â Â Defined and Serum-supplemented medium
(ii)Â Â Â Anchorage-dependent and Anchorage-independent cells
(b)Â Â Â Explain how pH is maintained in animal cell cultures. Mention two advantages
of maintaining pH during such cultures.
Detailed +2 Biotechnology question paper can be had from the below link.