After allowing phages grown with bacteria in a medium that contained 32p and 35s, hershey and chase used a centrifuge to separate the phage ghosts from the infected cell. they then examined the infected cells and found that they contained which demonstrated that is the phage's genetic material.
a) labeled dna protein
b) labeled dna labeled protein
c) labeled dna dna
d) labeled protein protein
e) labeled protein dna

c) labeled DNA ... DNA

Explanation:

Hersey and Chase prepared two separate virus samples and infected the host cell, E. coli, that was present into different culture media. One of them contained a radioactive isotope of phosphorus (³²P) and the other contained a radioactive isotope of sulfur (³⁵S). After a division cycle in bacteria, all the viruses recently formed had one of the two isotopes depending on the culture media in which infected bacteria had grown. Viruses coming from bacteria incubated with ³²P had radioactive DNA whereas viruses coming from bacteria incubated with ³⁵S had radioactive proteins. This was due to the differences between the structures of the DNA and proteins: DNA contains phosphorus, but not sulfur and the proteins contain sulfur in cysteine and methionine, but not phosphorus.

After incubation, the cells were centrifugated to separate any extracellular viral material. Hersey and Chase found out that ³⁵S remained outside of the bacterial cells, in the empty capsids, and that ³²P had entered the cells and was present in the new viruses formed. They concluded that the genetic material was DNA and not the proteins.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure