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The following table shows Chargaff’s data that demonstrates base composition of DNA from different biological sources. Source A T G C E. coli 26.0 26.9 24.9 25.2 Yeast 31.3 32.9 18.7 17.1 Sea urchin 32.8 32.1 17.7 18.4 Rat 28.6 28.4 21.4 21.5 Human 30.3 30.3 19.5 19.9  Which of the following is NOT a general conclusion that is supported by these data?

Suppose that Hershey and Chase found that phage contained 32P label was absent from infected coli. Furthermore, suppose they found 35S present in the infected E. coli. They would have concluded:  

Telomerase uses _____________ to synthesize new DNA.    

You are a research assistant in a lab that studies nucleic acids. Your advisor gave you four tubes for analysis. Each of these tubes differs in its contents by the source of its nucleic acids: mouse cytoplasm (single-stranded RNA), yeast nuclei (double-stranded DNA), rotavirus (double-stranded RNA), and parvovirus (single-stranded DNA). The approximate nucleotide base composition of each sample is given in the table below.   Tube A C U T G 1 32 17 0 32 17 2 34 16 15 0 35 3 30 46 0 10 23 4 33 16 25 0 17 Which tube most likely contains yeast nuclei?

A bacterial gene initiates transcription, but from random points on the DNA. Which of the following  proteins most likely is missing from the reaction?  

For which of the following is the “end-replication problem” relevant?    

The proofreading function of DNA polymerase III involves    

DNA polymerase III requires all of the following for DNA replication, EXCEPT  

You are a research assistant in a lab that studies nucleic acids. Your advisor gave you four tubes for analysis. Each of these tubes differs in its contents by the source of its nucleic acids: mouse cytoplasm (single-stranded RNA), yeast nuclei (double-stranded DNA), rotavirus (double-stranded RNA), and parvovirus (single-stranded DNA). The approximate nucleotide base composition of each sample is given in the table below.   Tube A C U T G 1 32 17 0 32 17 2 34 16 15 0 35 3 30 46 0 10 23 4 33 16 25 0 17 Which tube most likely contains yeast nuclei?

Telomerase uses _____________ to synthesize new DNA.