21. Which of the following is reffered as molecular glue ?

1. 1. DNA ligase

   
   
   

   2. DNA polymerase

   
   
   

   3. Restriction enzyme

   
   
   

   4. Topoisomerase

   
   
   

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   NA

   Correct Option: A

   NA

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22. Which one of the following types of cell has the ability to develop into any type of all ?

1. 1. Endodermal cell

   
   
   

   2. Ectodermal cell

   
   
   

   3. Stem cell

   
   
   

   4. Muscles cell

   
   
   

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   NA

   Correct Option: C

   NA

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23. Antibiotic belong to the category of

1. 1. Steroids

   
   
   

   2. Toxin

   
   
   

   3. Medicine

   
   
   

   4. Tonics

   
   
   

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   NA

   Correct Option: C

   NA

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24. Modified antibiotics are got through

1. 1. Vernalisation

   
   
   

   2. Ultrafiltration

   
   
   

   3. Ultracentrifuge

   
   
   

   4. Genetic engineering

   
   
   

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   NA

   Correct Option: D

   NA

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25. The enzymes that are used as molecular scissors to cut DNA at specific sites for various purposes in genetic engineering

1. 1. DNA ligases

   
   
   

   2. DNA polymerases

   
   
   

   3. Restriction endonucleases

   
   
   

   4. Restriction exon leases

   
   
   

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   NA

   Correct Option: C

   NA

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