Who proposed a semi-conservative mode of replication for DNA?

1.	Watson and Crick	2.	Meselson and Stahl
3.	Hershey and Chase	4.	Beadle and Tatum

A transcription unit does not contain:

The discontinuously synthesized DNA fragments are later joined by:

If E.coli was allowed to grow for 80 minutes after transfer from ¹⁵N to ¹⁴N medium, the number of hybrid density DNA molecules would be:

In eukaryotes, the sequences that appear in mature or processed mRNA are called:

What radioactive isotope was used by Meselson and Stahl to label DNA in their experiment?

Which of the following acts as the substrate and provides energy for DNA replication?

Which of the following is not a stop codon?

A segment of DNA coding for a polypeptide is most accurately defined as:

The central dogma of molecular biology was proposed by: