rRNA is synthesised by RNA polymerase I.

The Pribnow box (also known as the Pribnow-Schaller box) is the sequence TATAAT of six nucleotides (thymine-adenine-thymine-etc.) that are essential parts of a promoter site on DNA for transcription to occur in bacteria.

Post-transcriptional modifications of pre-mRNA involve 5'capping, 3' polyadenylation and RNA splicing.

Both Sn RNA and t-RNA are non protein coding genes and yield functional RNA as products.

Bacteriophages undergoes both lysis and lysogeny to express its genes.

A housekeeping gene is typically a constitutive gene that is transcribed at a relatively constant level. The housekeeping gene's products are typically needed for maintenance of the cell. It is generally assumed that their expression is unaffected by experimental conditions. Examples include actin, GAPDH and ubiquitin.

Lysozymes synthesised by the phage, attack the wall of the bacteria, causing its lysis and liberation of phages.

Nucleolus is composed of both RNA and proteins.

Phage is transmitted to the progeny of bacteria by lysogeny.

RSV is a retrovirus and expresses gene by teminism.

Bacteriophages undergoes DNA replication within minutes of infecting bacteria. About 100 to 150 molecules are produced at this stage.

The recombinant formed in transformation with slightly more amount of DNA is known as mrerozygote or partial zygote.

Gene expression in bacteria takes place by transformation. The donor DNA is broken into one gene segment which enters the recipient cell, gets integrated into recipient genome and expresses itself.

F-factor is a double-stranded plasmid DNA.

Beadle and Tatum showed that each gene in an organism controls the production of specific enzymes.