In DNA double helix, the two DNA chains are held together by

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#Question id: 15604

#XL - S Microbiology

The bacteria which cause septicaemia are fast becoming resistant to the antibiotics used for controlling them. Which one of the following explanations fits best?

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#Question id: 15605

#XL - S Microbiology

The uptake of plasmid DNA into Streptomyces protoplasts is enhanced by 

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#Question id: 15606

#XL - S Microbiology

A biopolymer which is stable in extreme physical and chemical environments, and exhibits physical and chemical properties similar to those of a plastic known as

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#Question id: 15607

#XL - S Microbiology

In gene transformation over high expression can be achieved by expressing the gene 

1. Inducible promoter

2. Constitutive  promoter

3. Terminator sequence

4. Increasing copy no. of gene

Which of the following are correct

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#Question id: 15608

#XL - S Microbiology

Melanins are light-absorbing biopolymers useful as topical sunscreens, sunlight-protective coatings for plastics, etc. Which gene is used for producing melanin. 

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#Question id: 15609

#XL - S Microbiology

Most bacteria, some protozoans  and even archaea use poly-β-hydroxybutyrate, a polymerized form of β-PHB, as