Question

A ribosome consists of:

• A. Four subunits
• B. Six subunits
• C. Two subunits
• D. Three subunits

Answer 1

Answer:

C. Two subunits

• Ribosomes are composed of two subunits with densities of 50S and 30S ("S" refers to a unit of density called the Svedberg unit).

• The 30S subunit contains 16S rRNA and 21 proteins; the 50S subunit contains 5S and 23S rRNA and 31 proteins.