Exam 6: A Tour of the Cell

Which of the following frequently imposes a limit on cell size?

In a liver cell detoxifying alcohol and some other poisons, the enzymes of the peroxisome remove hydrogen from these molecules and ________.

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 ________.

Which of the following is present in a prokaryotic cell?

What is the function of the nuclear pore complex found in eukaryotes?

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in which of the following organelles or structures?

H. V. Wilson worked with sponges to gain some insight into exactly what was responsible for holding adjacent cells together. He exposed two species of differently pigmented sponges to a chemical that disrupted intercellular junctions, and the cells of the sponges dissociated. Wilson then mixed the cells of the two species and removed the chemical that caused the cells to dissociate. Wilson found that the sponges reassembled into two separate species. The cells from one species did not interact or form associations with the cells of the other species. How do you explain the results of Wilson's experiments?

Which of the following is the smallest structure that would most likely be visible with a standard (not super-resolution)research-grade light microscope?

Which of the following macromolecules enter the nucleus of a eukaryotic cell through pores in the nuclear membrane?

Which organelle often takes up much of the volume of a plant cell?

In the fractionation of homogenized cells using differential centrifugation, which of the following will require the greatest speed to form pellets at the bottom of the tube?

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will take up asbestos by phagocytosis, but are not able to degrade it. As a result, asbestos fibers accumulate in ________.

Amoebae move by crawling over a surface (cell crawling), which involves ________.

In plant cells, the middle lamella ________.

Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from ________.

Which structure below is independent of the endomembrane system?

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

Cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will still be able to carry out which of the following processes?

What is the explanation for how a modern transmission electron microscope (TEM)can achieve a resolution of about 0.2 nanometers, whereas a standard light microscope has a maximum resolution of about 200 nanometers?