A B C D1. The cell theory states thatA. all cells have nucl

A B C D1. The cell theory states thatA. all cells have nucleiB. all life is comprised of one or more cellsC. life begins at conceptionD. all of the above A B C D2. Prokaryotes differ from eukaryotes in the following manner:A. prokaryotes have nuclei; eukaryotes lack nucleiB. prokaryotes lack ribosomes; eukaryotes have ribosomesC. prokaryotes have circular DNA; eukaryotes have linear DNAD. prokaryotes lack cell membranes; eukaryotes have cell membranes A B C D3. Apoptosis, pronounced apo-toe-sis, results inA. cells without nucleiB. webbed fingers and/or toesC. supernormal number of fingers and toesD. cell death A B C D4. The human body has about __________ different cell types.A. 10B. 100C. 200D. 500 A B C D5. Plant cells are unlike animal cells becauseA. they possess plasmodesmataB. they lack an endoplasmic reticulumC. they possess Golgi bodiesD. lack spindle fibers A B C D6. rRNAA. is found outside the nucleus in the cytoplasmB. is a structural element of ribosomesC. is read by ribosomesD. all of the above A B C D7. RibosomesA. construct proteinsB. contain proteinsC. contain RNAD. all of the above A B C D8. All of the following have membrane boundaries EXCEPTA. coated vesiclesB. lysosomesC. tonoplastsD. microtubules A B C D9. The cytoskeleton is defined by all of the following EXCEPTA. microtubulesB. endoplasmic reticulumC. intermediate filamentsD. microfilaments A B C D10. Capillary fenestrationsA. are found in endothelial cellsB. prevent leaks of plasma from blood vesselsC. allow white blood cells to enter tissuesD. are plant plasmodesmata A B C D1. Membrane phospholipidsA. have positive chargesB. have negative chargesC. are amphipathicD. all of the above A B C D2. Coacervates differ from micelles becauseA. only micelles have an outer polar or charged surfaceB. only coacervates have an outer polar or charged surfaceC. coacervates contain waterD. micelles are double-layered A B C D3. The innermost fluid-filled volume of the mitochondrion is called theA. matrixB. cytoplasmC. KrebsD. endoplasmic reticulum A B C D4. Which of the following requires energy expenditure for molecules to cross the membraneA. simple diffusionB. sodium-coupled transportC. facilitated diffusionD. bulk flow A B C D5. Which of the following requires a cohesive stream across the membraneA. simple diffusionB. sodium-coupled transportC. facilitated diffusionD. bulk flow A B C D6. PorinsA. are highly selective channelsB. require small amounts of energy for transportC. require large amounts of energyD. are common in structural membranes A B C D7. The sodium-potassium exchange pumpA. exchanges 2 sodiums for 3 potassiumsB. is a symport channelC. converts ADP to ATPD. creates a negative cell interior A B C D8. The entrance of glucose into the cell via sodium-coupled transportA. requires a high internal sodium concentrationB. is an example of an antiport channel at the point of entryC. requires no energy at the site of entryD. requires a high glucose concentration outside the cell A B C D9. Which of the following is trueA. Dirt is amphipathic and grime is amphipathicB. Dirt is hydrophilic and grime is amphipathicC. Dirt is hydrophilic and grime is hydrophobicD. Dirt is amphipathic and grime is hydrophilic A B C D10. Which of the following are not membrane bound structures A. ribosomesB. nucleusC. mitochondriaD. erythrocyte

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