A Tour of the Cell Chapter 6

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A Tour of the Cell Chapter 6 Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

This electron micrograph of a photosynthetic bacterium shows that these bacteria have chloroplasts. these bacteria are the evolutionary precursors of chloroplasts. these bacteria have membranes similar to the thylakoid membranes of chloroplasts. these bacteria have membrane-enclosed organelles. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

Difference between Plant and Animal Cells Which of these organelles are absent in plant cells? mitochondria centrioles peroxisomes all of the above none of the above Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

Nucleic Acid Localization If you treat cells with radioactive UTP, where in the cell would you expect the greatest concentration of radioactivity within the first few minutes? nuclear matrix cytoplasm rough ER nucleolus Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

Endomembrane System A membrane protein synthesized in the rough ER may be directed to peroxisomes. lysosomes. mitochondria. all of the above Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

Golgi Brefeldin A is a drug that disrupts transport from the ER to the Golgi apparatus. What other organelles and membranes are affected? lysosomes, vacuoles, plasma membrane lysosomes, peroxisomes, plasma membrane vacuoles, mitochondria, plasma membrane lysosomes, vacuoles, nuclear membrane all intracellular organelles and membranes Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

Microtubule Function Taxol, a drug approved for treatment of breast cancer, prevents depolymerization of microtubules. What cellular function that affects cancer cells more than normal cells might taxol interfere with? maintaining cell shape cilia or flagella chromosome movements in cell division cell division (cleavage furrow formation) cytoplasmic streaming Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.

ECM in Plant and Animal Cells The difference in the structures of animal cell extracellular matrix and plant cell walls reflects what fundamental difference(s) in their adaptive strategies? Animal cells must move more than plant cells. Animal cells have to be more responsive to changes in their environment. Animal cells have to communicate with each other more than plant cells. all of the above Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings.