Chapter 6: The Cell

Which domains of life are classified as prokaryotes?

Bacteria and Archaea

Which of the following is a major difference between prokaryotic cells and eukaryotic cells?

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells?

Proteins secreted by prokaryotes are likely synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane.

What path does a protein in the secretory pathway take, starting from its site of synthesis?

Rough ER, Golgi apparatus, secretory vesicles, plasma membrane

A newly discovered unicellular organism isolated from acidic mine drainage is found to contain a cell wall, a plasma membrane, two flagella, and peroxisomes. Based just on this information, the organism is most likely ________.

a motile eukaryote

Which organelle plays a role in intracellular digestion?

lysosome

Which structure is common to plant and animal cells?

mitochondrion

Mitochondria are found in _____.

plant and animal cells

A cell with a predominance of rough endoplasmic reticulum is most likely ________.

producing large quantities of proteins for secretion

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

Which of the following are found in plant, animal, and bacterial cells?

ribosomes

In bacteria, DNA will be found in ________.

the nucleoid