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Terms in this set (51)

D is correct. The conclusion of the experiment rests on the assumption that DNA, but not protein, was transferred between generations and therefore contained the genetic instructions conveyed during phage replication. The experimenters based their conclusion on the observation that labeled phosphorus (contained only in nucleic acids), but not labeled sulfur (incorporated into the amino acids of proteins), was transferred from phage virions into infected bacteria.

If D is true, that protein did go into the bacteria (but just happened not to pick up the radiolabel), then the experiment would be challenged. Protein entering the bacteria might suggest that protein is the carrier of genetic information, not DNA.

A: Regardless of whether insertion of phage DNA occurred immediately after phage adsorption or following a delay, the underlying principle of intergenerational DNA transfer being the exclusive means of conveying genetic information between phage particles remains unchallenged.

B: This fits the experimental assumption that DNA carries genetic informations and does not challenge it. If no labeled phosphorus remained in infected bacterial cells after lysis, this supports the conclusion that labeled phosphorus was transferred into phage progeny and incorporated into their nucleic acids.

C: This choice indicates that the function of the protein coat, once synthesized, is independent of DNA, but does not challenge the conclusion that genetic information is contained within DNA, not protein.