In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond

The daughter DNA that was extracted from the culture one generation after the transfer from ¹⁵N to ¹⁴N medium had:

A failure in cell division after DNA replication results in:

What is another name for thymine?

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: