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Practice Quiz Key #1: The Cell
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The Plasma Membrane
T or F
1.) The plasma membrane is selectively permeable, meaning that it allows some substances to pass through and not others. True
2.) Pumps that maintain concentration gradients utilize kinetic energy, and have no need for ATP. False
3.) Ions are driven into and out of the cell by concentration gradients only, electrical gradients play no role in ion movement. False
4.) Which ion plays the largest role in maintaining the resting membrane potential?
5.) Which direction will water flow when a cell is placed in a hypertonic solution
6.) Which of the following organelles contains its own DNA
7.) Which is a non-membranous organelle?
8.) Which cytoskeletal structure has the greatest diameter?
9.) Which of the following detoxifies alcohol and neutralizes free radicals?
10.) Which organelle might be highly developed in a cell that exports large amounts of proteins?
11.) During which phase, might we expect that the nuclear membrane will be absent?
12.) Which event occurs within the nucleus?
13.) Which structure(s) is responsible for producing ribosomes?
14.) What is the functional unit of DNA?
15.) In anaphase the sister chromatids have split and are now called _____________
16.) During which phase are the sister chromatids aligned along the cells equator?
17.) Which mitotic spindle structures are responsible for pushing the centrioles to the poles of the dividing cell?