Exam 7: Inside the Cell

Motor proteins require energy in the form of ATP.ATP hydrolysis results in a conformational change that allows the protein to move along microtubular tracks (pathways).What structural component of the motor protein contains the ATP binding site and,therefore,changes shape to enable movement?

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 phagocytize asbestos,but are not able to degrade it.As a result,asbestos fibers accumulate in _____.

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

Which of the following is not a characteristic that chloroplasts and mitochondria share?

Which of the following cytoskeletal proteins are important in changing cell shape or location (any type of cell movement)?

To what does the 9 + 2 arrangement of microtubules,typical of cilia and eukaryotic flagella,refer?

Depending on the species of organism,mitochondrial DNA codes for about 13 proteins;however,these proteins account for only a small proportion of the proteins found in mitochondria.The other proteins are coded for by nuclear DNA.Which of the following helps explain how these proteins find their way to the mitochondria?

Mitochondria are separated into two compartments (the matrix and the intermembrane space)by their inner and outer membranes.How does the presence of two compartments contribute to mitochondrial function?