Question

1.Describe and compare eukaryotic and prokaryotic flagella.

2.Describe post-translational and cotranslational transport.

3.Describe prokaryotic mRNA translation in detail, including all steps from start to finish, including all factors.

4.Describe the molecular events involved in regulation of the lac operon in response to both glucose and lactose levels, and transcript (mRNA) abundance regulation in the prokaryotic trp operon including attenuation.

5.Completely describe transcript (mRNA) abundance regulation in the prokaryotic trp operon, and discuss whether or not the attenuation mechanism of transcriptional regulation is appropriate for eukaryotes.

Answer 1

Ans 1. Flagella serve similar functions in eukaryotic and prokaryotic organisms. But the structures are completely different in these two.

Flagella in eukaryotic organisms are microtubule based structures which are anchored at the cell membrane by basal bodies or centrioles.

There are single stranded in prokaryotic cells and 11 stranded in eukaryotic cells.

The size is smaller and are narrower in prokaryotic cells whereas they are larger and thicker in eukaryotic cells.

It is composed of protein flagella in prokaryotes and protein tubulin in eukaryotes.

They perform lashing or undulatory movements in eukaryotes and rotatory movements in prokaryotes.