Question

Ribosomes are produced in:
A) Nucleolus
B) Cytoplasm
C) Mitochondria
D) Golgi body

Answer 1

Ribosomes are biological macromolecules that help in the synthesis of proteins, also known as translation from corresponding messenger RNAs(mRNA).

Complete answer:
The location of synthesis of ribosomes is different in bacteria and eukaryotes. In bacteria the ribosomes are synthesized in the cytoplasm whereas in eukaryotes the ribosomes are synthesized in the nucleolus. The ribosomes are made up of a special kind of RNA known as the ribosomal RNA in combination with many proteins. E
Each ribosome is made up of one large subunit and one small subunit that fit together and carry out the translation of an mRNA molecule. Bacteria consists of 70S ribosome that is made of large 50S subunit and small 30S subunit whereas eukaryotes contain 80S ribosomes made from large 60S subunit and small 40S subunit.
The S stands for Svedberg unit that is a measure of rate of sedimentation. The ribosomes can be found floating in the cytoplasm or they are associated with the endoplasmic reticulum leading to the formation of the rough endoplasmic reticulum, both of these ribosomes have the same function that is synthesis of polypeptide chains.

Hence the correct answer is option ‘A’.

Note: The ribosome not only helps in the synthesis of the polypeptide chain but also helps in protein folding that finally gives rise to the mature protein, which is the functional form of the protein. The ribosomes sometimes act as ribozymes and can catalyse several important biological reactions such as splicing.