THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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only the marked Sulfur showed up in the pellet, showing that DNA got into the bacteria
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only the marked Phosphorous showed up in the pellet, showing that DNA got into the bacteria
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only the marked Sulfur showed up in the supernatant, showing that the protein dd not get into the bacteria
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only the marked Phosphorous showed up in the supernatant, showing that the protein did not get into the bacteria
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Detailed explanation-1: -They observed that the first set of viruses (A) consisted of radioactive DNA but not radioactive proteins. This is because DNA is a phosphorus-based compound while protein is not. The latter set of viruses (B) consisted of radioactive protein but not radioactive DNA. The host for infection was E.coli bacteria.
Detailed explanation-2: -In their experiments, Hershey and Chase showed that when bacteriophages, which are composed of DNA and protein, infect bacteria, their DNA enters the host bacterial cell, but most of their protein does not. Hershey and Chase and subsequent discoveries all served to prove that DNA is the hereditary material.
Detailed explanation-3: -The protein shell of the virus was tagged with radioactive sulphur, and this ended up in the supernatant. The heavier bacterial cells formed the pellet, so Hershey and Chase knew that DNA was the genetic material of the virus, as the phosphorus was found there.
Detailed explanation-4: -Hershey and Chase used radioactivity to answer the question of whether protein or DNA was the genetic material. They labeled the DNA in a T2 phage with radioactive phosphate, and labeled the protein coat of the T2 phage with radioactive sulfur.
Detailed explanation-5: -It is made of two polynucleotide chains, which are coiled and forms a double helix. The DNA is passed from one generation to another by making copies of itself. Complete answer: Two scientists Alfred Hershey and Martha Chase proved that DNA is a genetic material by working on bacteriophages.