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.
The mucosa is the inner lining of the stomach. The rugae are longitudinal folds that help in the churning and mixing the food with digestive juices. A circular muscular valve, the pyloric sphincter, is located at the far end or pyloric end of the stomach.he colon is the narrowed continuation of the valvular intestine. It is located at the posterior end of the body cavity. The rectal gland is a slender, blind-ended, finger-like structure that leads into the colon by means of a duct.