The SOS response: how bacteria deal with damaged DNAS.E. Gould
In bacteria, this can happen in two general ways. In one of these, the termination sequence is transcribed, generating a length of mRNA that folds back in on itself and thereby "bunches up" as the RNA polymerase continues to do its job. These folded sections of mRNA are often referred to...
How many types of DNA polymerase are present in bacteria? What is an anticodon of the transfer RNA for valine? What type of genome does a RNA virus have? How does RNA differ from DNA? What type of heliz does RNA form? What is RNA?
CRISPR RNA (crRNA) and Cas9:CRISPR DNA serves as a permanent record of past infections, but for bacteria to use these sequences to thwart viruses, they must convert them into DNA's cousin,RNA. Through a process called transcription, bacteria first copy one of the two CRISPR DNA strands int...
So the researchers found another phage that would work against the Enterococcus bacteria causing Cole’s infection, and began administering both phages. That seemed to do the trick. For four months, Cole was infection-free. She left the hospital and went on vacation with her family. But then ...
How many polynucleotides are found in one molecule of DNA? How many tRNA types are in a human cell? How many types of DNA polymerase are present in bacteria? How do the different DNA nucleotides pair during DNA replication? How many DNA profiles are in CODIS?
It has long been recognized that the thermodynamics of mRNA–tRNA base pairing is insufficient to explain the high fidelity and efficiency of aminoacyl-tRNA (aa-tRNA) selection by the ribosome. To rationalize this apparent inconsistency, Hopfield propose
Much of the critical work has investigated the bc1 complex in Rhodobacter species of photosynthetic bacteria. The major advantage of working in photosynthetic systems lies in the fact that the bc1 complex is tightly integrated into the photosynthetic machinery [24], so that excitation with a saturati...
Why does a bacterial cell make environmental DNA brought into the cell into a single-stranded form? Transduction Viruses that infect bacteria (bacteriophages) may also move short pieces of chromosomal DNA from one bacterium to another in a process calledtransduction(seeFigure 3 in The Viral Life ...
When a patient tests positive for any type of STEC, an isolate of the bacteria or the positive sample itself is often sent to the state public health lab for confirmation, determination of the serotype, and DNA fingerprinting. With the advent of whole genome sequencing, the serotype can be ...