Is this statement true or false? 'Animal cells have mitochondria; plant cells have chloroplasts.' Explain your answer, and describe the functions of these organelles.

Which of the following cell structures would you expect to be most important in the growth of bacteria on the surface of your teeth? a. cell wall b. fimbriae c. flagella d. cilia

What four cellular components are shared by prokaryotic and eukaryotic cells?

Eukaryotic cells differ from prokaryotic cells in that only eukaryotic cells . a. contain DNA; b. have a plasma membrane; c. are considered to be alive; d. have a nucleus; e. are able to evolve

In what ways do the internal membranes of a eukaryotic cell contribute to the functioning of the cell?

Describe the structure of the plasma membrane of an animal cell. What would be found directly inside and outside the membrane?

Imagine a spherical cell with a radius of 10 μm. What is the cell's surface area in μm2? Its volume, in μm3? (Note: For a sphere of radius r, surface area = 4πr2 and volume = 4/3πr3. Remember that the value of π is 3.14.) What is the ratio of surface area to volume for this cell? Now do the same calculations for a second cell, this one with a radius of 20 μm. Compare the surface-to-volume ratios of the two cells. How is this comparison significant to the functioning of cells?