First slide

Eukaryotic Cells

Question

Identify the incorrect statement

Easy

A

In prokaryotes, ribosomes are associated with the plasma membrane of the cell.
B

Ribosomes are composed of ribonucleic acid (RNA) and proteins.
C

70S ribosomes are found in almost all eukaryotic cells.
D

Ribosomes were first observed by Frederick W. Kühne.

Solution

Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade.
They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane.
70S ribosomes are found in mitochondria and hence can be observed in almost all eukaryotic cell.

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