Ribosomes
$
0.50
Ribosomes may be small but they're certainly useful! You can buy 1 for 50 cents, or 3 for $1!!! Ribosomes have no membrane, and are made of protein and RNA. They are made in the nucleolus. Ribosomes are like one specific part of a factory. They direct protein synthesis, or make proteins, which are used by various other parts of the cell.