Samples prepared for transmission electron microscopy are embedded in an epoxy resin and sliced into ultrathin (100 nm) sections. The sections are usually stained with a heavy metal such as lead to enhance contrast. The sections are then examined with a transmission electron microscope. The photographs of these thin sections are put in order according to their position in the living cell and used to determine the shape of the original sample. Determine the appearance of the original, intact cell.

The correct answer is - Erythrocytes or Red Blood Cells.

Explanation:

Transmission electron microscopy or TEM is embedded in an epoxy resin and sliced into sections that are very thin almost 100 nm. Stain for such sections is usually a heavy metal such as lead to enhance contrast.

The Images of these thin sections are arranged together in order of location in the living cell and used to determine the shape of the original sample.

The cells are Erythrocytes or Red Blood Cells. The shape of the cell is a biconcave shape. The surfaces of the cell from both side are curve inward as like as the interior of a sphere.

Thus, the correct answer is - Erythrocytes or Red Blood Cells.

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