Hershey and Chase camed out an expenment to tblew the movement of the ghage DNA
ID: 211358 • Letter: H
Question
Hershey and Chase camed out an expenment to tblew the movement of the ghage DNA and A. The 35 S radiloactivity mostly tound with the bacteria and nat in the kupematant B. Two of the listed answers are comect Question3 in the Transformation experment performed by Griffth wo staing of Pwumacoecus bactena were the R and the S strain bacteria were killed by heat and njected into he mice A.The mice would be heathy d aive, ae ive s sran sona .cu, bet seee to ne ise mice B. The mice wouid get sick and die and ive R stran bactena wouid de ecoveree tom the deat C.The mice would get sick and de lo s sman bac would be recovered om the deed mice ive mice mice Question 4 Which of the following provides the free 3-OH group for DNA polymerase t 9 m the ends of telomere DNA? C A The end of the previous Okazals fragment B. The RNA primers id down by prase C C The RNA found in telomerase D.The ends are filed n by RNA polymen who des not war, at-ya-gneExplanation / Answer
2. Here the correct answer is option D. The 32-P radioactivity is mostly found with the bacteria and not in the supernatant. We all know that sulphur (S) is found only in proteins not in the DNA. As well as phosphorous (P) is found only in the DNA not in the proteins. They made radiolabeled T2 phage virus with 35S in the capsid and 32P in the DNA. After infection the phage DNA enters within the bacterial DNA and capsid remains in bacterial cell wall. So we can come to the conclusion that DNA is the genetic material not the protein.
3. As both the R and S strain bacteria were heat killed so no one is able to transfer their gene to another. So the mice would be healthy and alive and no bacterial strain would be recovered from the live mice. So here option D is the correct answer.
4. The RNA found in the telomerase provides the free 3'-OH group for DNA polymerase to fill in the ends of the telomere DNA. We all know that telomerase is a RNA dependent DNA polymerase. At first telomerase adds some nucleotides to the leading strand and increases it's length. Now it appoints RNA primer and DNA polymerase to the lagging strand and maintains the end of the DNA. So here option C is the correct answer.