Examination of a cell by transmission electron microscopy reveals a high density of ribosomes in the cytoplasm. this observation suggests that this cell is actively producing large amounts of which of the following molecules?

Proteins.

Explanation:

Ribosomes are cellular organelles, the protein builders the cell. They link amino acids together in the order specified by the genetic material, so the result is a long chain of amino acids that form a protein. Free ribosomes  found in the cytoplasm are important because they produce proteins which are essential for internal cellular activity.

The advantage of having a high density of ribosomes working at the same time is speed, as proteins are made one after another. Then, the more ribosomes there are, the more proteins there will be.

answer by yourhope:

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in which structure in the nucleus are ribosomes made?

b) nucleolus!

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what the squwock

explanation: