Molecular Genetics

RNA plays a central role in various life processes, including the synthesis of proteins (translation), the processing of pre-mRNA (splicing), and various regulatory metabolic functions. Therefore, all listed processes involve RNA.

Reverse transcriptase (RNA-dependent DNA polymerase) in retroviruses synthesizes a DNA strand from an RNA template, forming an RNA-DNA hybrid intermediate.

The Griffith effect refers to the discovery of bacterial transformation, where non-virulent bacteria were converted into virulent ones by a 'transforming principle' from dead virulent bacteria.

The central dogma of molecular biology describes the flow of genetic information: DNA is transcribed into mRNA, which is then translated into a polypeptide chain using tRNA and amino acids.

In the bacterial ribosome, the 23S rRNA is a ribozyme, meaning it acts as a catalyst (specifically, a peptidyl transferase) to form peptide bonds between amino acids during translation.

A gene is a sequence of nucleotides along a DNA strand - with 'start' and 'stop' codons and other regulatory elements - that specifies a sequence of amino acids that are linked together to form a protein.

There are various methods of making the host cell competent for transformation with Recombinant DNA technology.

Progenotes are hypothetical primitive cellular forms thought to have existed early in evolution. They would have contained DNA as their primary genetic material.

Transcription is the process of formation of RNA from DNA. Transcription takes place inside the nucleus, where the DNA of a cell is stored. Since eukaryotes have a defined membrane bound nucleus, therefore transcription always takes place inside the nucleus in eukaryotic cells.
Translation, on the other hand is the process of production of proteins from messenger RNA. Production of proteins require ribosomes and ribosomes are found in cytoplasm. Thus, translation always occurs inside cytoplasm, whether it is a prokaryotic or eukaryotic cell.
In prokaryotes, however there is no define membrane bound nucleus. The DNA or the genetic material of prokaryotes lie inside cytoplasm only. Therefore, prokaryotic cells are the only cells where transcription and translation both occurs inside cytoplasm.
Hence, the correct option 'Prokaryotic cell'.

The differences between initiation step of protein synthesis in eukaryotes and prokaryotes are : 

RNA is capable of catalyzing a number of chemical reactions, including the polymerization of nucleotides. RNA is uniquely able both to serve as a template for and to catalyze its own replication. Consequently, RNA is generally believed to have been the initial genetic system, and an early stage of chemical evolution is thought to have been based on self-replicating RNA molecules—a period of evolution known as the RNA world.