Ribosomes - Practice Questions & MCQ

Ribosomes

• The ribosomes are the organelles that are not bound by any membrane. 
• These are made up of ribosomal RNA (rRNA) and proteins. Hence, these are ribonucleoprotein particles. 
• These may be found attached to the rough endoplasmic reticulum or may be present freely in the cytoplasm. 
• Each ribosome is made up of two subunits - a large subunit and a small subunit. 
• The ribosomes in eukaryotic cells are of 80S type while in prokaryotic cells they are of  70S types. 
• The ‘S’ denotes the Svedberg unit for sedimentation rate that measures shape, size and density of the ribosomes.
• The main function of the ribosome is to perform the translation of the mRNA to form the polypeptide chain.
   

Difference between 70S and 80S ribosomes:

Ribosomes

• The ribosomes are the organelles that are not bound by any membrane. 
• These are made up of ribosomal RNA (rRNA) and proteins. Hence, these are ribonucleoprotein particles. 
• These may be found attached to the rough endoplasmic reticulum or may be present freely in the cytoplasm. 
• Each ribosome is made up of two subunits - a large subunit and a small subunit. 
• The ribosomes in eukaryotic cells are of 80S type while in prokaryotic cells they are of  70S types. 
• The ‘S’ denotes the Svedberg unit for sedimentation rate that measures shape, size and density of the ribosomes.
• The main function of the ribosome is to perform the translation of the mRNA to form the polypeptide chain.
   

Difference between 70S and 80S ribosomes: