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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Explain briefly: Chitinase - Biology

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प्रश्न

Explain briefly:

Chitinase

स्पष्ट करा
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उत्तर

Chitinase is a class of enzymes used for the degradation of chitin, which forms a significant component of the fungal cell wall. Therefore, to isolate the DNA enclosed within the cell membrane of the fungus, the enzyme chitinase is used to break the cell to release its genetic material.

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पाठ 13: Principles and Processes of Biotechnology - NCERT EXERCISES WITH ANSWERS [पृष्ठ ५३६]

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नूतन Biology [English] Class 12 ISC
पाठ 13 Principles and Processes of Biotechnology
NCERT EXERCISES WITH ANSWERS | Q 10. (c) | पृष्ठ ५३६

संबंधित प्रश्‍न

Draw a labelled sketch of sparged-stirred-tank bioreactor. Write its application.


Can you list 10 recombinant proteins which are used in medical practice? Find out where they are used as therapeutics (use the internet).


Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks?


Describe briefly the following:

Bioreactors


Describe briefly the following:

Downstream processing


Which of the following term used for defining a viral genome incorporated into host DNA?


______ plays an important role in blood clotting.


DNA fragments generated by the restriction endonuclease in a chemical reaction can be separated by ______.


PCR and restriction fragment length polymorphism are the methods for ______.


A single strand of nucleic acid tagged with a radioactive molecule is called ______.


Gene Amplification using primers can be done by ______.


PCR proceeds mthree distinct steps governed by temperature, they are in order of ______.


The first step in recombinant DNA technology is


In addition to the Taq polymerase enzyme, which other thermostable DNA polymerases have been isolated to be used in PCR?


During the process of gene amplification using PCR, if a very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first?


Significance of 'heat shock' method in bacterial transformation is to facilitate ______.


Which of the following steps are catalysed by Taq DNA polymerase in a PCR reaction?


Which of the following should be chosen for best yield if one were to produce a recombinant protein in large amounts?


How is copy number of the plasmid vector related to yield of recombinant protein?


Identify and explain steps ‘A’, ‘B’ and ‘C’ in the PCR diagram given below.


Read the paragraph given below and answer and questions that follow:

Enzyme Taq polymerase, is extracted from a eubacterial microorganism Thermus aquaticus from Yellowstone National Park in Montana, USA and isolated by Chien et al. (1976). Taq polymerase successfully replaced the DNA polymerase from E.coli that was being used in PCR earlier and this shift revolutionised the PCR technique.
  1. Taq polymerase after its discovery replaced E.coli DNA polymerase in PCR technique. Explain giving reasons why was the need felt for the change?
  2. What is a primer and its importance in PCR?
  3. Write the importance of PCR as a diagnostic tool.

Assertion (A): Synthetic oligonucleotide polymers are used during Annealing in a PCR.

Reason (R): The primers bind to the double stranded DNA at their complementary regions.


Bioreactors are the containment vehicles of any biotechnology-based production process. For large scale production and for economic reasons the final success of biotechnological process depends on the efficiency of the bioreactor.

Answer the following questions w.r.t. the given paragraph:

  1. List the operational guidelines that must be adhered to so as to achieve optimisation of the bioreactor system. Enlist any four.
  2. Mention the phase of the growth we refer to in the statement "Optimisation of growth and metabolic activity of the cells".
  3. Is the biological product formed in the bioreactor suitable for the intended use immediate? Give reason in support of your answer.

Which of the following statements is incorrect?


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