2. Cell Chemistry & Cell Components

Which of the following structures is found in animal cells but not plant cells?

A substance moving from outside the cell into the cytoplasm must pass through __________.

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

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

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 wallb. fimbriaec. flagellad. cilia

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?

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

In what way do the membranes of a eukaryotic cell vary?a. Phospholipids are found only in certain membranes.b. Certain proteins are unique to each membrane.c. Only certain membranes of the cell are selectively permeable.d. Only certain membranes are constructed from amphipathic molecules.

Which of the following is/are likely to limit the maximum size of a cell?

Cancer is the same asa. all tumors.b. all neoplasms.c. all malignant neoplasms.c. benign tumors.d. hyperplasia.

Which of the following structures is found in eukaryotic but not prokaryotic cells?