Therefore, whenever a ddNTP is added to a growing DNA strand, it is unable to chemically bind with the next nucleotide in the chain, and the DNA strand stops growing. Figure 3: By adding together information about all of the truncated strands, researchers can determine the nucleotide sequence of the DNA target.
Functions of the Bladder. Temporary store of urine â The bladder is a hollow organ. The walls are very distensible, with a folded internal lining (known as rugae), this allows it to hold up to 600ml. Assists in the expulsion of urine â During voiding, the musculature of the bladder contracts, and the sphincters relax.
peristalsis originating in the smooth muscle of the calyces and initiated by pacemaker cells enables urine to be propelled through both the renal pelvis and the ureters to the bladder the kidneys are the main excretory organs of the urinary tract and are found on the posterior abdominal wall