(Download) CBSE Class-12 Sample Paper 2022-23: Biotechnology

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(Download) CBSE Class-12 Sample Paper 2022-23 : Biotechnology

Sample Question Paper (Term-1) 2022-23

Subject Name : Biotechnology

Subject Code : 045

Time Allowed: 90

Minutes Maximum Marks: 40

SECTION - A

1. Male sterility is widely used in crops such as maize, sunflower for hybrid production. Male sterile plants are created by introducing a gene encoding-
(a) Barnase protein
(b) TA29
(c) Barstar protein
(d) Coat protein

2. Body builders prefer to drink buffalo milk to build muscle mass. Determine the reason for this?
(a) Easier to digest
(b) Lower fat content
(c) Higher calcium and phosphorus content
(d) Balanced calorie source

3. An industrially important secondary metabolite which is used as a red pigment in lipstics and dye for silk is obtained from-
(a) Datura stramonium
(b) Lithospermum erythrorhizon
(c) Digitalis lanata
(d) Coptis japonica

4. Proteome of a given cell is dynamic because :
(a) In response to Internal and external changes the biochemical machinery of the cell could be changed.
(b) In response to Internal and external changes the biochemical machinery of the cell could not be changed.
(c) No direct relationship exists between Internal and external changes in the biochemical machinery of the cell.
(d) Indirect relationship exists between Internal and external in changes the biochemical machinery of the cell.

5. Artificial seeds are produced by-
(a) Encapsulating somatic embryos in calcium alginate beads
(b) Desiccating the somatic embryos with or without coating
(c) Hydrating the somatic embryos
(d) Hydrating the zygotic embryos.

6. Being a researcher, you want to improve the deficiency of certain amino acids in cereals and legumes. Choose the technique out of the following which will be the best to achieve your goal:
(a) Plant tissue culture
(b) Adding fertilizers to soil
(c) Protein engineering
(d) Vegetative Propagation

7. Foreign DNA is directly introduced into the recipient cell using a fine micro-syringe to transform it. The probable advantage this provides could be:
a) No specialised equipment required
b) No damage to cells
c) Low transduction rate
d) Precision of delivery