Question

In eukaryotic cell, the type of ribosome is

• A. Only $70S$
• B. Only $80S$
• C. $70S$and $80S$ both
• D. None of the above

Answer 1

The correct option is C $70S$and $80S$ both

Eukaryotic ribosomes are also known as 80 S ribosomes, referring to their sedimentation coefficient in Svedberg units, because they sediment faster than the prokaryotic $\left(40S\right)$ and large subunit $\left(60S\right)$ according to their sedimentation coefficients. Both subunits contain dozens of ribosomal proteins arranged on a scaffold composed of ribosomal RNA (rRNA). Prokaryotic ribosomes are known as $70S$.
Therefore, the correct answer is option B.