HESI A2 Biology 2025 – 400 Free Practice Questions to Pass the Exam

The ribosomes are the cellular structures involved in the translation of genetic information. They play a crucial role in protein synthesis by interpreting the mRNA (messenger RNA) sequence transcribed from DNA. During this process, ribosomes read the sequence of codons in the mRNA and match each codon with the corresponding amino acid, allowing for the construction of polypeptide chains that eventually fold into functional proteins.

Ribosomes can be found floating freely in the cytoplasm or attached to the endoplasmic reticulum, contributing to the production of proteins either for use within the cell or for export outside the cell. Their fundamental role in converting genetic code into functional proteins is essential for the maintenance and operation of living organisms.

In contrast, while mitochondria are involved in energy production, the nucleus houses the genetic material and is responsible for transcription rather than translation. The Golgi apparatus is primarily involved in modifying, sorting, and packaging proteins produced by ribosomes for secretion or for use within the cell.