Question
GeneralGeneralGeneral

What is the function of ribosomes?

Verified Answer

Ribosomes are cellular structures responsible for protein synthesis, where they translate genetic information into functional proteins required for cell structure and activities.

They are found either freely in the cytoplasm or attached to the endoplasmic reticulum (ER).

Functions of ribosomes:

1. Protein synthesis (translation)
Ribosomes read the sequence of messenger RNA (mRNA) and assemble amino acids in the correct order to form proteins.

2. Decoding genetic information
They interpret genetic instructions carried from DNA (via mRNA) to ensure accurate protein formation.

3. Formation of peptide bonds
Ribosomes catalyze the formation of peptide bonds between amino acids, building polypeptide chains.

4. Location-based functions:

  • Free ribosomes: produce proteins used within the cell

  • Bound ribosomes (on ER): produce proteins for secretion or for use in membranes

Structure:

  • Made of ribosomal RNA (rRNA) and proteins

  • Consist of two subunits (large and small)

Importance:

  • Essential for cell growth and repair

  • Required for enzyme production

  • Supports all metabolic activities

In simple terms: Ribosomes act as protein factories that build proteins based on instructions from genetic material.