What is a bacterial plasmid?Multiple choice question.A unique type of ribosomeAn internal structure where cellular respiration occursA small, circular piece of DNA separate from the bacterial chromosomeAn external appendage involved in motility

Which of the following describes plasmids?Synthesise proteins.Controls what enters and exits the cell.Small circles of DNA that are used to share useful genes between bacteria.Contains all the instructions the bacterium needs to function and develop.

Discuss the role of plasmid in working of bacteria.

Plasmids can be useful for many different elements of molecular microbiology but there are many considerations that dictate the features of a plasmid being used. If using a plasmid in order to express a large quantity of a particular protein (e.g. for protein purification) which of the following is NOT a requirement?The ability of the host bacterium to express GFP.A selectable marker that will facilitate retention of the plasmid.The presence of rep/ori genes that allows for replication of the plasmid in the bacterium of interest.A strong promoter that will drive transcription of the gene of interest and subsequent protein production.

Which of the following statements about bacteria is NOT correct? Bacteria usually have circular chromosomes Bacteria usually have more than one chromosome Bacteria often have plasmids Bacterial DNA is packaged into a nucleoid Bacteria have little non-coding DNA

DNA that is circular and apart from the chromosome in a prokaryote is a(n)Multiple Choiceribosome.endospore.nucleus.nucleoid.plasmid.