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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 Biotechnology Principles and Processes of Biology.
76
Dolly, The first cloned mammal, was produced by
[1]
Parthenogenesis
[2]
Artificial fertilization
[3]
Replacement of zygote nucleus by somatic nucleus
[4]
in vitro fertilization
Answer: Replacement of zygote nucleus by somatic nucleus
77
An improved variety of transgenic basmati rice
[1]
Gives high yield and is rich in vitamin A
[2]
Does not require chemical fertilizers and growth hormones
[3]
Give high yield but has no characteristic aroma
[4]
Is completely resistant to all insect pests and diseases of paddy
Answer: Gives high yield and is rich in vitamin A
78
Restriction endonuclease
[1]
Restricts the synthesis of DNA inside the nucleus
[2]
Cuts the DNA molecule at specific sites
[3]
Cuts the DNA molecule randomly
[4]
Synthesizes DNA
Answer: Cuts the DNA molecule at specific sites
79
Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?
[1]
5′ CACGTA 3′; 3′ CTCAGT 5′
[2]
5′ CGTTCG 3′; 3′ ATGGTA 5′
[3]
5′ GATATG 3′; 3′ CTACTA 5′
[4]
5′ GAATTC 3′; 3′ CTTAAG 5
Answer: 5′ GAATTC 3′; 3′ CTTAAG 5
80
Plasmid has been used as vector because :
[1]
Both ends show replication
[2]
It can move between prokaryotic and eukaryotic cells
[3]
It is circular DNA which have capacity to join to eukaryotic DNA
[4]
It has antibiotic resistance geneRecombinant DNA technology
Answer: It is circular DNA which have capacity to join to eukaryotic DNA
81
Structure involved in genetic engineering is
[1]
Plasmid
[2]
Codon
[3]
Plastid
[4]
Scissors
82
Embryo culture is used for
[1]
Establishing suspension culture
[2]
Recovery of inter specific hybrids
[3]
Somatic hybridization
[4]
Haploid production
Answer: Recovery of inter specific hybrids
83
A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of
[1]
Trichoderma
[2]
Pseudomonas
[3]
Bacillus
[4]
Xanthomonas
84
Which one of the following is used as vector for cloning genes into higher organisms?
[1]
Salmonella typhimurium
[2]
Retrovirus
[3]
Baculovirus
[4]
Neurospora crassa
85
The enzymes required to obtain wall-free / naked protoplasts are
[1]
Cellulase and proteinase
[2]
Cellulase and pectinase
[3]
Cellulase and amylase
[4]
Amylase and pectinase
Answer: Cellulase and pectinase
86
The first clinical gene therapy was given for treating?
[1]
Rheumatoid arthritis
[2]
Chicken pox
[3]
Diabetes mellitus
[4]
Adenosine deaminase deficiency
Answer: Adenosine deaminase deficiency
87
Adenosine deaminase deficiency
[1]
foreign DNA in some of their cells
[2]
foreign DNA in all of their cells
[3]
foreign RNA in all of their cells
[4]
Both (A) and (C)
Answer: foreign DNA in all of their cells
88
The vector for T-DNA is
[1]
Thermus aquaticus
[2]
Salmonella typhimurium
[3]
Agrobacterium tumefaciens
[4]
Bacillus thuringiensis
Answer: Agrobacterium tumefaciens
89
First artificial gene was synthesized by
[1]
Nirenberg
[2]
Mendel
[3]
Morgan
[4]
Khorana
90
Genetic Engineering is
[1]
plastic surgery
[2]
addition or removal of genes
[3]
study of extranuclear genes
[4]
all of the above
Answer: addition or removal of genes
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