Griffith’s transformation experiment in Streptococcus pneumoniae demonstrated that:
1.    Heat-killed virulent bacteria failed to produce disease in mice
2.    Live non-virulent bacteria failed to produce disease in mice
3.    Heat-killed virulent bacteria transformed non-virulent bacteria into virulent form
4.    Live virulent bacteria alone produced fatal infection in mice

What facilitates the opening of the helix during the elongation step of transcription?

The repressor of the lac operon is:

The base pairing in a double stranded DNA is correctly described as:

Any mistakes during DNA replication by the enzyme would result into:

In a transcription unit, RNA polymerase binds to:

The distance between a base pair in the DNA double helix is approximately:

Transcription and translation can be coupled in:

In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:

What is added to the 5’ end of hnRNA in Eukaryotes?