eric dickerson who played for the rams colts raiders and falcons between 1983 1993 holds the nfl record for rushing yards in a season when he gained 2105 yards for the l os angeles rams in 19848 others found this usefultyler smiths 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
Lysosomes are surrounded by a membrane composed of phospholipids and contain digestive enzymes. The waste they remove can be in the form of invading bacteria, broken cell parts, or an entire unneeded cell. To unlock this lesson you must be a Study.com Member. Create your account.
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.