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Biotechnology : Principles And Processes

Question
CBSEENBI12047398
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The structure of E. coli chromosomal DNA is

  • double- stranded, right handed and circular

  • single- stranded, right handed and circular

  • double- stranded, left handed and linea

  • double- stranded, left handed and circular

Solution

A.

double- stranded, right handed and circular

E. coli is a Gram negative rod-shaped bacteria that commonly found in animal faeces, lower intestines of mammal. E. coli has only one circular chromosome and the DNA is doubled stranded, right handed.

Some More Questions From Biotechnology : Principles and Processes Chapter

What are the different tools in Recombinant DNA technology?

Give the full form of PCR. Who developed it ?

What is the source of DNA polymerase i.e., Taq polymerase ?

Define “melting of target DNA”.

What would be the molar concentration of human DNA in a human cell ? Consult your teacher.

Do eukaryotic cells have restriction endonucleases ? Justify your answer.

From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size. How did you know ?

Expand EFB.

What are two core techniques that enabled birth of biotechnology ?

What is genetic engineering? Explain briefly the distinct steps common to all genetic engineering technology.
Or
With the help of diagrams show the different steps in the formation of recombinant DNA by action of restriction endonuclease.

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