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NCERT page number 187
10.5 Microbes As Biocontrol Agents
Microbes In Human Welfare
Which of the following is free living nitrogen fixer?
NCERT page number 188
10.6 Microbes As Biofertiliser
Microbes In Human Welfare
Mycorrhizae is
NCERT page number 188
10.6 Microbes As Biofertiliser
Microbes In Human Welfare
Which of the following is not cynobacteria?
NCERT page number 188
10.6 Microbes As Biofertiliser
Microbes In Human Welfare
In paddy fields, which of the following serve as an important Biofertiliser?
NCERT page number 188
10.6 Microbes As Biofertiliser
Microbes In Human Welfare
A cloning vector has two antibiotic resistance genes- for tetracycline and ampicillin. A foreign DNA
was inserted into the tetracycline gene. Non-recombinants would survive on the medium containing :
Both genes are functional in non-recombinants. In recombinants the gene for tetracycline resistance would be insertionally inactivated.
Elution is:
Answer 3. Read page 198, XII NCERT
A host cell normally does not take up a foreign DNA until it has been made competent to do so. This is because:
Cell membrane is made of a phospholipid bilayer and allows only lipid soluble substances to diffuse across it.
The first type II restriction endonuclease discovered that could cut dsDNA specific site was:
Answer 3. read page 195, XII NCERT
A gene, whose expression helps to identify transformed cells is known as
(a) A gene whose expression helps to identify transformed cell is known as selectable marker. Usually, the genes encoding resistance to antibiotics, such as tetracycline, ampicillin, etc. are useful selectable markers for e.g E.Coli.
Concept Enhancer Plasmid pBR322 has two resistance genes; amphicillin resistance (ampR) and tetracyclin resistance (tetR). These are considered as useful selectable markers.
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