Question

40S and 60S are

• A. Types of rRNA in eukaryotes
• B. Types of rRNA in prokaryotes
• C. Ribosomal subunits in eukaryotes
• D. Ribosomal subunits in prokaryotes

Answer 1

The correct option is C Ribosomal subunits in eukaryotes

The ribosome has a larger subunit and a smaller subunit. In prokaryotes, the subunits are 50S (larger) and 30S (smaller), while in eukaryotes, the ribosomal subunits are 60S (larger) and 40S (smaller). Each of these subunits would be composed of a mixture of rRNA and proteins. In eukaryotes, the 40S ribosomal subunit contains the 18S type of rRNA. The 60S subunit consists of 5S, 5.8S and 28S types of rRNA. In prokaryotes, the 30S subunit consists of 16S type of rRNA and the 50S subunit consists of 5S and 23S types of rRNA.