What is a genome and what is it composed of? What is the central dogma of...

What is a genome and what is it composed of? What is the central dogma of molecular biology?

Approximately how large is the Escherichia coli genome in base pairs? How many genes does it contain?

What are the components of a ribosome? What functional roles does rRNA play in protein synthesis?

Expert Solution

Genome refers to the genetic material of an organism ...DNA (or RNA) it consist of both coding DNA , non coding DNA , mitochondrial DNA and chloroplast DNA

Central dogma is the stepwise process in which a genetic information is translated into protein or it describes the flow of genetic information in an organism ...DNA ---(TRANSCRIPTION) --- RNA ---(TRANSLATION)----PROTEIN

E.coli has a circular DNA with ~4.6 million base pairs...individual Ecoli genome has ~4000 to 5000genes

Ribosome also known as the translational machinery is made of two subunits small subunit and a large subunit (30S and 50S for prokaryotes ..40S and 60S for eukaryote) each subunits are made of many rRNAs and ribosomal proteins ..

The rRNA is the major component of ribosome ...it helps in interaction of ribosome with mRNA ..recruitment of correct tRNA for peptide bond formation....

gladiator answered 2 years ago

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