Practice_Exam_1_F08 - Biology 100 Fall 2008 PRACTICE EXAM 1...

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Page 1 of 4 Biology 100 McClenaghan Fall 2008 PRACTICE EXAM 1 1. “Genetic changes in populations over time” is the definition of _____________. a. taxonomy b. physiology c. mutation d. evolution e. ecology 2. When atoms of the same kind bond together, the result is called a (an) “___________.” a. element b. compound c. polar molecule d. ion e. peptide 3. In animals, excess monosaccharides are stored as a polysaccharide called ________. a. starch b. cellulose c. fat d. glycogen e. ATP 4. A double membrane surrounds what eukaryotic cell organelle? a. rough ER b. vacuole c. ribosome d. chloroplast e. none of the above 5. Cells nearly always have lower concentrations of oxygen (O 2 ) inside them compared to the surrounding environment. As a result, O 2 enters cells via _____________. a. osmosis b. diffusion c. endocytosis d. active transport e. pinocytosis 6. Asphyxiation results when oxygen is withheld from human cells. In biochemical terms, ATP production is largely halted because a lack of oxygen prevents _____________ from occurring. a. glycolysis b. the Calvin cycle c. oxidative phosphorylation d. the Krebs cycle e. lactic acid fermentation 7. In photosynthesis, what molecule is oxidized? a. glucose b. oxygen c. water d. carbon dioxide e. G3P 8. In terms of the biological hierarchy, we humans are “organisms.” This means we are composed of members of the next lowest level in the hierarchy, _________________. a. cells b. organ systems c. tissues d. organs e. tissue systems 9. Organisms must maintain a relatively constant internal pH. Protein molecules called “_________” aid in this process by picking or releasing H+ ions in response to changes in pH. a. buffers b. nucleic acids c. enzymes d. cytochromes e. hemoglobins 10. Ribose is a 5-carbon sugar that is an important component of the subunits that makeup nucleic acids. Given this information, you would conclude that ribose is a _____________. a. polysaccharide b. lipid c. disaccharide d. monosaccharide e. steroid 11. In eukaryotic cells, one would expect to find Krebs cycle reactions occurring in organelles called ______. a. ribosomes b. mitochondria c. lysosomes d. Golgi bodies e. nucleoli 12. The concentration of water inside a red blood cell (RBC) is about 95%. What will happen if RBCs are placed into an environment of 90% water? a. They will shrink in size.
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Practice_Exam_1_F08 - Biology 100 Fall 2008 PRACTICE EXAM 1...

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