A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA.
Plasmids are most often found in bacteria and are used in recombinant DNA research to transfer genes between cells.
A plasmid is a small molecule of DNA that replicate independently within the cell. A population of cells carrying a desired plasmid is called a clone.
The origin of replication in an expression plasmid is a specific DNA sequence that allows the plasmid to replicate, or make copies of itself, within a host cell. This sequence is essential for the plasmid to be maintained and passed on to daughter cells during cell division.
A helper plasmid is one that allows for the beginning of replication and transfer of other plasmids from a donor to a recipient. Without a helper plasmid, transposons will not be expressed in the recipient.
Most of the body water in the human body is located within the cells, known as intracellular fluid.
within blood vessels
When the F factor is in plasmid form within a bacterial cell, the cell is referred to as an F-positive or F+ cell. This means the cell carries the plasmid containing the F factor, which enables the cell to transfer genetic material during conjugation.
Every plasmid has a copy number that reflects the average number of copies of a certain plasmid inside a host cell(usually a bacterial cell). So a multicopy plasmid, exist in multiple copies in any given bacteria. It is believed that the higher the copy number is, the more efficient the plasmid is at replicating itself.
Yes, the bronchi are located in the thoracic cavity.
An altered plasmid is a modified version of a circular DNA molecule called a plasmid. These alterations can include the insertion, deletion, or modification of specific genes or DNA sequences within the plasmid to change its function or properties. Altered plasmids are commonly used in molecular biology research for genetic engineering purposes.
Ampicillin is an antibiotic that is usually used as a reporter gene in cloning. A plasmid containing the ampicillin resistance gene (as well as another target gene within the plasmid) is introduced into the bacterial host. If the bacterium has taken up the plasmid and is expressing the plasmid, it will be resistant to ampicillin. LB is used as a growth medium and ampicillin to verify the plasmid is within the bactrium. No growth means no plasmid in the bacterial host...
Incorporation and expression of a plasmid in eukaryotic cells is typically achieved through a process called transfection. This involves introducing the plasmid DNA into the cells using methods such as electroporation or lipid-mediated transfection. Once inside the cell, the plasmid can be expressed by the cell's machinery to produce the desired protein or gene product.
The transformed bacterial cells will replicate the plasmid along with their own genomic DNA each time they divide. This allows for amplification of the plasmid within the bacterial population. The plasmid can carry genes for antibiotic resistance, gene expression, or other functions that can be advantageous for the bacteria in certain conditions.