Exam 7: Cell Structure and Function

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 structural elements?

An early step in the evolution of eukaryotic cells most likely involved which of the following events?

Which of the following statements describes a primary function of the middle lamella associated with plant cells?

Which of the following microscopy techniques is best suited for visualizing protein complexes in their cellular environments without the use of preservatives?

The volume and surface area for three different cells are listed in the following table: Based on data from the table above, which of the following statements best explains which cell will be able to eliminate wastes most efficiently?

Which of the following areas in bacterial cells best describes where chromosomal DNA is generally localized?

An organelle in a newly discovered cell contains thylakoids, DNA, and ribosomes. These findings suggest that this organelle is most likely similar to which of the following organelles?

Which of the following statements describes a primary function of integrins?

Which of the following pairs of organism groups consist solely of prokaryotic cells?

Vinblastine, a drug that inhibits microtubule polymerization, is used to treat some forms of cancer. Cancer cells treated with vinblastine would most likely be unable to perform which of the following cellular functions?

If homogenized cells are fractionated by differential centrifugation, which of the following organelles will require the greatest centrifugation speed to form a pellet at the bottom of the tube?

Which of the following organelles often occupy the majority of the volume of a plant cell?

Which of the following is present in a prokaryotic cell?

Bending of cilia and flagella results from which of the following activities?

Which of the following statements best describes some aspect of cytoskeleton structure or function in eukaryotic cells?

Which structure is part of the endomembrane system?

Certain animal cells normally have well-defined spherical nuclei when observed by light microscopy. Cells with a genetic defect have irregularly-shaped nuclei. Which of the following cytoskeletal elements is most likely affected by this genetic defect?

Asbestos is a material that was extensively used in construction for decades. 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. Toxicity most likely results from accumulation of asbestos in which of the following organelles?

Tay-Sachs disease is a human genetic disorder that results in cellular accumulation of very large, complex, undigested lipids. Which of the following organelles is most likely defective in Tay-Sachs disease?

Which of the following organelles is primarily responsible for the production and modification of polysaccharides that will be secreted?