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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Strategies for Environment and Food Production of Biology.
61
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed:
[1]
recombinant DNA technology
[2]
transgenic mechanism
[3]
mutation breeding
[4]
gene therapy.
Answer: mutation breeding
62
Which one of the following is a marine fish:
[1]
Rohu
[2]
Hilsa
[3]
Catla
[4]
Common Carp.
63
33 percent of India’s (Gross Domestic Product) comes from
[1]
Industry
[2]
Export
[3]
Agriculture
[4]
Small-scale cottage industries.
64
Fungicides and antibiotics are chemicals that:
[1]
enhance yield and disease resistance
[2]
kill all pathogenic microbes
[3]
kill pathogenic fungi and bacteria, respectively
[4]
kill pathogenic bacteria and fungi respectively.
Answer: kill pathogenic fungi and bacteria, respectively
65
Protoplast is:
[1]
another name for protoplasm
[2]
an animal cell
[3]
plant cell without a cell wall
[4]
plant cell.
Answer: plant cell without a cell wall
66
Which one of the following products of apiculture is used in cosmetics and polishes:
[1]
honey
[2]
oil
[3]
wax
[4]
Royal jelly
67
An organism that expresses a transgene is called
[1]
Clone organism
[2]
Mutated organism
[3]
somaclonal organism
[4]
Transgenic organism
Answer: Transgenic organism
68
Fusion between protoplasts of the selected parents is induced by
[1]
Polyethyl glycol
[2]
Electric current
[3]
mutagene
[4]
both 1 and 2
69
Recombinant proteins are proteins produced by
[1]
Dominant genes
[2]
Transgenes
[3]
Mutated genes
[4]
Recessive genes
70
The way in which biotechnology can contribute to sustainable agriculture is
[1]
biofertilizer
[2]
Single Cell Protein (SCP)
[3]
Disease and insect resistant varieties
[4]
All of the above
71
A patent is granted for
[1]
An invention
[2]
The process of generating a product
[3]
An improvement in an earlier invention
[4]
All of these
72
Haploids of Datura are produced by
[1]
Tissue culture
[2]
Anther culture
[3]
Subculture
[4]
Meristem culture
73
Production of which enzyme was blocked in Flavr Savr tomato
[1]
Ligase
[2]
Invertase
[3]
Peptidase
[4]
polygalacto uronase
Answer: polygalacto uronase
74
Microorganism used as biopesticides is
[1]
Fungi
[2]
Protozoa
[3]
Bacteria
[4]
All of these
75
A crop that contains and expresses a transgene is called
[1]
GM crops
[2]
Transgenic crop
[3]
Genetically modified crop
[4]
both 2 and 3
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