Biology 1107 Unit 2 Test Good Luck! The advantage of light microscopy over elect
ID: 203610 • Letter: B
Question
Biology 1107 Unit 2 Test Good Luck! The advantage of light microscopy over electron microscopy is that . A) light microscopy provides for higher magnification than electron microscopy B) light microscopy provides for higher resolving power than electron microscopy C) light microscopy allows one to view dynamic processes in living cells D) light microscopy provides higher contrast than electron microscopy 2) All ofthe following are part of a prokaryotic cell EXCEPT A) a cell wall B) a plasma membrane C) ribosomes D) an endoplasmic reticulum 3) For a protein to be an integral membrane protein, it would have to be A) hydrophilic B) hydrophobic C) amphipathic, with at least one hydrophobic region D) exposed on only one surface of the membrane 4) Cell size is limited by A) the number of proteins within the plasma membrane B) the surface area of mitochondria in the cytoplasm C) surface to volume ratios D) the size of the endomembrane system 5) According to the fluid mosaic model of cell membranes, phospholipids A) can move laterally along the plane of the membrane B) frequently flip-flop from one side of the membrane to the other C) occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane D) have hydrophilic tails in the interior of the membrane 6) The membranes of winter wheat are able to remain fluid when it is extremely cold by- A) increasing the percentage of unsaturated phospholipids in the membrane B) increasing the percentage of cholesterol molecules in the membrane C) decreasing the number of hydrophobic proteins in the membrane D) cotransport of glucose and hydrogen 7) An animal cell lacking oligosaccharides on the external surface of ts plasma membrane would likely in which function? A) transporting ions against an electrochemical gradient B) cell-cell recognition C) attaching the plasma membrane to the cytoskeleton D) establishing a diffusion barrier to charged moleculesExplanation / Answer
1. Light microscopy allows one to view dynamic processes in living cells.
2. Endoplasmic reticulum
3. Hydrophobic
4. Surface to volume ratio
5. Frequently flip flop from one side of the membrane to the other
6. Increasing the percentage of unsaturated phospholipid present in the membrane.
7. Cell cell recognition
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