most seasons as qb brett farve just passed johnny unitas playing the most seasons as qb with the minnesota vikings during the 2009 season george blanda played as th e oldest qb for the oakland raiders at the age of 43 1970 and had one of the most incredible seasons in the history of the games of the 2007 season the nfl record for passing yardage in a season is held by dan marino of the miami dolphins who threw for 5084 yards in 1984
A lysosome is a type of membrane-bound organelle that is present in animal cells. Ranging in diameter from approx. 50nm to 1 Î¼mÂ§, lysosomes have a single outer membrane consisting of a phospholipid bilayer and contain acid hydrolases which are enzymes capable of breaking-down macromolecules.
Ribosomes are found in the cytoplasm of a cell. They are either free floating or bound to the endoplasmic reticulum. Groups of ribosomes stuck together are called polysomes. Most cells contain thousands of ribosomes, while a few specialized cells contain millions. Brain cells and the cells of the pancreas contain large concentrations of ribosomes since they produce a large amount of protein. slide 2 of 6. The Structure of Ribosomes Although ribosomes are called organelles, they don't have a membrane that holds the contents of the ribosome in one cohesive structure. Ribosomes are composed of ribosomal RNA (rRNA) and protein. Sixty percent of the structure is rRNA and 40 percent is protein. There are two subunits: a large subunit and a small subunit. They are labeled as 60s and 40s after the Svedberg values. The subunits of ribosomes are produced in the nucleolus, which is located in the nucleus of the cell. Ribosomal proteins enter the nucleolus and combine with four rRNA strands to produce the two subunits. The subunits leave the nucleus through the nuclear pores and combine in the cytoplasm.