Ribosomes - A ribosome is composed of 2 subunits. In...

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Ribosomes Ribosomes read the code in mRNA and synthesize protein accordingly. The symbols to the left are used in the drawings of protein synthesis below. The ribosome attaches to the mRNA. As ribosomes move along messenger RNA (mRNA), the amino acids are added to a growing chain to form a particular protein. In these drawings, the ribosome moves from left to right. In this drawing, the protein is nearly complete. When the ribosome reaches the end of the genetic message, it will become detached from the mRNA. Several ribosomes may be attached to a strand of mRNA forming a unit called a polysome.
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Unformatted text preview: A ribosome is composed of 2 subunits. In eukaryotic cells, the subunits are synthesized in the nucleolus and move into the cytoplasm. During the process of protein synthesis, two subunits will come together along with mRNA. . Ribosomes are composed of both RNA (called ribosomal RNA or rRNA) and protein . Ribosomes in eukaryotes about 1/3 larger than those in prokaryotes. Nucleolus The nucleolus is a structure within the nucleus where the ribosomal subunits are produced. In cells that have been stained, it appears darker than the nucleus....
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