English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Would you choose an exonuclease while producing a recombinant DNA molecule? - Biology

Advertisements
Advertisements

Questions

Would you choose an exonuclease while producing a recombinant DNA molecule?

Would you like to choose an exonuclease enzyme while producing a recombinant DNA molecule?

Very Short Answer
Advertisements

Solution

No, as exonuclease acts on the free ends of linear DNA molecule. Therefore, instead of producing DNA fragments with sticky ends, it will shorten or completely degrade the DNA fragment containing the gene of interest, and the circular plasmid (vector) will not get cut as it lacks free ends.

shaalaa.com
Tools of Recombinant DNA Technology - Restriction Enzymes
  Is there an error in this question or solution?
Chapter 11: Biotechnology : Principles and Processes - VERY SHORT ANSWER [Page 78]

APPEARS IN

NCERT Exemplar Biology [English] Class 12
Chapter 11 Biotechnology : Principles and Processes
VERY SHORT ANSWER | Q 2. | Page 78
Nootan Biology [English] Class 12 ISC
Chapter 13 Principles and Processes of Biotechnology
Test Your Progress | Q 21. | Page 533

RELATED QUESTIONS

Suggest a technique to a researcher who needs to separate fragments of DNA.


How does a restriction nuclease function? Explain


Name and describe the technique that helps in separating the DNA fragments formed by the use of restriction endonuclease


Collect 5 examples of palindromic DNA sequences. Better try to create a palindromic sequence by following base-pair rules.


Explain briefly:

Restriction enzymes and DNA


Answer the following question.
Explain the significance of palindromic nucleotide sequence in the formation of recombinant DNA.


The total number of nucleotide sequences of DNA that code for a hormone is 1530. The proportion of different bases in the sequence is found to be Adenine = 34%, Guanine = 19%, Cytosine = 23%, Thymine = 19%.

Applying Chargaff’s rule, what conclusion can be drawn?


A mixture containing DNA fragments a, b, c and d, with molecular weights of a + b = c, a > b and d > c was subject to agarose get electrophoresis. This position of these fragments from cathode to anode to anode sides of the gel would be ______.


Which of the following radioisotope is not suitable for DNA labeling based studies?


Restriction enzymes ______.


There is a restriction endonudease called as EcoRI. What does co part in it stands for?


Molecular scissors, which cut DNA at specific site is ______.


DNA fragments separate according to size through?


DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as ______


Which of the following enzymes catalyse the removal of nucleotides from the ends of DNA?


Which of the given statements is correct in the context of visualizing DNA molecules separated by agarose gel electrophoresis?


'Restriction' in Restriction enzyme refers to ______.


While isolating DNA from bacteria, which of the following enzymes is not required?


Which of the following statements does not hold true for restriction enzyme?


Restriction enzymes should not have more than one site of action in the cloning site of a vector. Comment.


Restriction enzymes that are used in the construction of recombinant DNA are endonucleases which cut the DNA at ‘specific-recognition sequence’. What would be the disadvantage if they do not cut the DNA at specific-recognition sequence?


How does one visualise DNA on an agarose gel?


Given below is the stepwise schematic representation of the process of electrophoresis. Identify the 'alphabets' representing 

  1. Anode end
  2. smallest/lightest DNA strand in the matrix
  3. Agarose gel


Given below is the restriction site of a restriction endonuclease Pst-I and the cleavage sites on a DNA molecule.

\[\ce{5' C - T - G - C - A \overset{\downarrow}{-}{G 3'}}\]

\[\ce{3' G\underset{\uparrow}{-} A - C - G - T - C 5'}\]

Choose the option that gives the correct resultant fragments by the action of the enzyme Pst-I.


State the principle involved in separation of DNA fragments using gel electrophoresis.


How are DNA fragments visualised once they are separated by gel electrophoresis?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×