Question

Question 25 pts

The hereditary/genetic material of living cells is

Group of answer choices

RNA

DNA

Either of the above, depending on the organism

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Question 26 pts

The genetic material of viruses is

Group of answer choices

RNA

DNA

Either of the above, depending on the virus

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Question 27 pts

The process in which cells take up free DNA from their environment is called

Group of answer choices

Transcription

Transformation

Translation

Transmutation

Question 28 pts

The Hershey-Chase experiment utilized bacteriophage to demonstrate that DNA, and not protein, is the genetic material by

Group of answer choices

Transforming bacteria and subjecting mice to different bacterial strains

Labeling proteins with ³²P and nucleic acids with ³⁵S

Using a combination of nucleases and nucleic acids under different conditions

Labeling nucleic acids with ³²P and proteins with ³⁵S

Answer 1

Answer 25: DNA (deoxyribonucleic acid) is the genetic material of all livibg organisms. It is formed of three components a) nitrogenous base b) pentose sugar and c) phosphoric acid. This combination pf these three is know as a nucleotide. Which forms the backbone of DNA.

Answer 26: The genetic material of viruses can b either DNA or RNA . They can be either single stranded or double. Most of the viruse structure generally is formed by a nucleic acid part covered with a protein coat and viruses use the machenary of host cell to multiply.

Answer 27: Transformation is the process by which bacterial cells can acquire or take up exogenous genes or fragments of DNA from their environment. The DNA passes through the membrane of the cell.

Answer 28: Hershey and chase used different isotopes as it was know that viruses made up of DNA and protein coats so they used the isotopes which were specific only for DNA and protein by allowing each to be observed and analyzed separately. As phosphorus is contained in DNA but not amino acids they used radioactive phosphorus-32 to label the DNA contained in the T2 phage and further used Radioactive sulfur-35 for protein sections of the T2 phage as sulfur is contained in protein but not DNA.