Question

Give Answers of following questions

1.What did Hershey and Chase experiment proved?



2.By what, Hershey and Chase labelled the protein coat if bacteriophage?



3.Which enzyme releases the tension of the unzipped string of DNA?



4.Which enzyme prevents formation of H-bonds in the DNA strands again after unwinding?



5.How many turns of winding of DNA is there on an Histone octamer?

Answer 1

Hershey and Chase did two experiments to prove that DNA is the carrier of the genetic information. First, they grew phages (viruses which infect bacteria) in a medium containing radioactive sulphur (35S). This marked all the proteins of the phage (the hull) radioactive.