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प्रश्न
Explain briefly:
Chitinase
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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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संबंधित प्रश्न
Name two commonly used bioreactors.
Suggest and describe a technique to obtain multiple copies of a gene of interest in vitro.
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?
Answer the following question:
Describe the formation of recombinant DNA by the action of EcoRI.
DNA fragments generated by the restriction endonuclease in a chemical reaction can be separated by ______.
A single strand of nucleic acid tagged with a radioactive molecule is called ______.
Gene Amplification using primers can be done by ______.
Blood stains are found at the site of a murder. It DNA profiling technique is to be used for identifying the criminals, which of the following is ideal for use?
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?
Rising of dough is due to ______.
Which of the following contributed in popularising the PCR (polymerase chain reactions) technique?
An antibiotic resistance gene in a vector usually helps in the selection of ______.
Do biomolecules (DNA, protein) exhibit biological activity in anhydrous conditions?
Identify and explain steps ‘A’, ‘B’ and ‘C’ in the PCR diagram given below.
Illustrate the design of a bioreactor. Highlight the difference between a flask in your laboratory and a bioreactor which allows cells to grow in a continuous culture system.
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. |
- Taq polymerase after its discovery replaced E.coli DNA polymerase in PCR technique. Explain giving reasons why was the need felt for the change?
- What is a primer and its importance in PCR?
- Write the importance of PCR as a diagnostic tool.
State the advantage of using Thermostable DNA polymerase.
Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near anode while larger fragments are found near the wells in an agarose gel.
In the light of the above statements, choose the most appropriate answer from the options given below:
Which of the following statements is incorrect?
Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence.
- Insertion of recombinant DNA into the host cell.
- Cutting of DNA at specific location by restriction enzyme.
- Isolation of desired DNA fragment.
- Amplification of gene of interest using PCR.
Choose the correct answer from the options given below:
Which enzyme is specifically used to break open fungal cells during the isolation of genetic material?
In agarose gel electrophoresis, why do DNA fragments move toward the positive electrode?
Which enzyme is responsible for joining the desired gene to a carrier vector DNA to form recombinant DNA?
