Unit 2 Exam Review (Answers).notebook September 26, 2017

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1 Unit 2 xam Review (nswers).notebook JOPRY! Unit 2 xam Review ame Tuesday, September 26 th

2 Unit 2 xam Review (nswers).notebook ow to play JOPRY! The class will be split into two teams, the R team and the RN team. When a question is displayed, the R team will use the keys on their clickers to answer. The RN team will use the keys to answer. The team with the IST PRNT of correct responses will earn the points for that question, N the right to pick the next category! Let's do a practice question to make sure everybody understands how to play. o on to the Practice Question 2

3 Unit 2 xam Review (nswers).notebook 1 Insert Question ere What is Mr. Mohn's rap name? "Pooh ear" "Minty resh" "lava Punisher" "The Plasmolyzer" Sample Question /: "Minty resh" o on to the ame oard 3

4 Unit 2 xam Review (nswers).notebook Insane in the Membrane ow do you get Lyme isease? Pro arry Tick ey There ell! You're Looking Swell. "Whaddup?" $100 $100 $100 $100 $200 $200 $200 $200 $300 $300 $300 $300 $400 $400 $400 $400 $500 $500 $500 $500 Red Team Score oard reen Team 4

5 Unit 2 xam Review (nswers).notebook 1 Insert Question ere Insane in the Membrane 100 pts The interior of the phospholipid bilayer is water. hydrophilic. hydrophobic. composed of cholesterol. / : hydrophobic (nonpolar) 5

6 Unit 2 xam Review (nswers).notebook 2 Insert Question ere Insane in the Membrane 200 pts xocytosis moves materials a cell via. out of; diffusion into; facilitated diffusion into; membranous vesicles out of; membranous vesicles / : out of; membranous vesicles 6

7 Unit 2 xam Review (nswers).notebook 3 Insert Question ere Insane in the Membrane 300 pts Which of the following factors would tend to INRS membrane fluidity? a lower temperature a greater proportion of saturated phospholipids a greater proportion of unsaturated phospholipids a relatively high protein content in the membrane / : a greater proportion of unsaturated phospholipids 7

8 Unit 2 xam Review (nswers).notebook 4 Insert Question ere Insane in the Membrane 400 pts In what way do the various membranes of a eukaryotic cell differ? ertain proteins are unique to each membrane. Only certain membranes of the cell are selectively permeable. Only certain membranes are constructed from amphipathic molecules. Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm. / : ertain proteins are unique to each membrane. 8

9 Unit 2 xam Review (nswers).notebook 5 Insert Question ere Insane in the Membrane 500 pts ccording to the fluid mosaic model of membrane structure, proteins of the membrane are mostly embedded in a lipid bilayer. confined to the hydrophobic core of the membrane. randomly oriented in the membrane, with no fixed insideoutside polarity. free to depart from the fluid membrane and dissolve in the surrounding solution. / : embedded in a lipid bilayer. 9

10 Unit 2 xam Review (nswers).notebook 1 Insert Question ere Which of these structures is unique to plant cells? flagellum peroxisome mitochondrion central vacuole Pro arry Tick 100 pts / : central vacuole 10

11 Unit 2 xam Review (nswers).notebook Pro arry Tick 200 pts 2 Insert Question ere Which of the following is NOT considered part of the endomembrane system? chloroplast olgi apparatus plasma membrane endoplasmic reticulum / : chloroplast 11

12 Unit 2 xam Review (nswers).notebook 3 Insert Question ere yanide binds with at least one of the molecules involved in the production of TP. ollowing exposure of a cell to cyanide, most of the cyanide could be expected to be found within the ribosomes. lysosomes. peroxisomes. mitochondria. Pro arry Tick 300 pts / : mitochondria 12

13 Unit 2 xam Review (nswers).notebook 4 Insert Question ere Pro arry Tick 400 pts The symptoms of a certain inherited disorder in humans include breathing problems and, in males, sterility. Which of the following is a reasonable hypothesis for the molecular basis of this disorder? a defective enzyme in the mitochondria defective ribosome assembly in the nucleolus defective dynein molecules in cilia and flagella abnormal hydrolytic enzymes in the lysosomes / : defective dynein molecules in cilia and flagella 13

14 Unit 2 xam Review (nswers).notebook 5 Insert Question ere Pro arry Tick 500 pts Which of the following statements is a distinction between prokaryotic and eukaryotic cells that is attributable to the absence of a prokaryotic cytoskeleton? Prokaryotic cells have cell walls. Organelles are found only in eukaryotic cells. ytoplasmic streaming is not observed in prokaryotes. Only the eukaryotic cell concentrates its genetic material in a region separate from the rest of the cell. / : ytoplasmic streaming is not observed in prokaryotes. 14

15 Unit 2 xam Review (nswers).notebook 1 Insert Question ere Which of the following processes includes all others? ey There, ell! You're Lookin' Swell. 100 pts osmosis passive transport facilitated diffusion diffusion of a solute across a membrane / : passive transport 15

16 Unit 2 xam Review (nswers).notebook 2 Insert Question ere ey There, ell! You're Lookin' Swell. 200 pts In a hypotonic solution, an animal cell will lyse because the solution outside the plasma membrane has a amount of. higher... solute lower... cellulose lower... free water higher... free water / : higher... free water 16

17 Unit 2 xam Review (nswers).notebook 3 Insert Question ere ey There, ell! You're Lookin' Swell. 300 pts If a cell s pressure potential (ψ P ) is 3 bars and its solute potential (ψ S ) is 4.5 bars, what is the resulting water potential (ψ)? 1.5 bars 1.5 bars 7.5 bars 7.5 bars / : 1.5 bars (ψ = ψ P + ψ S ) 17

18 Unit 2 xam Review (nswers).notebook ey There, ell! You're Lookin' Swell. 400 pts 4 Insert Question ere Which type of cell would probably provide the best opportunity to study lysosomes? muscle cell bacterial cell leaf cell of a plant phagocytic white blood cell / : phagocytic white blood cell 18

19 Unit 2 xam Review (nswers).notebook 5 Insert Question ere ased on the model of sucrose uptake in this figure, which of the following experimental treatments would increase the rate of sucrose transport into the cell? decreasing cytoplasmic p ey There, ell! You're Lookin' Swell. 500 pts decreasing extracellular p decreasing extracellular sucrose concentration adding a substance that makes the membrane more permeable to hydrogen ions / : decreasing extracellular p 19

20 Unit 2 xam Review (nswers).notebook 1 Insert Question ere "Whaddup?" 100 pts inding of a signal molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane? intracellular receptor receptor tyrosine kinase ligand gated ion channel protein linked receptor / : ligand gated ion channel 20

21 Unit 2 xam Review (nswers).notebook 2 Insert Question ere Signal transduction pathways benefit cells for all of the following reasons except "Whaddup?" 200 pts they can amplify a signal. they help cells use up phosphate generated by TP breakdown. they enable different cells to respond appropriately to the same signal. they help cells respond to signal molecules that are too large or too polar to cross the plasma membrane. / : they help cells use up phosphate generated by TP breakdown. 21

22 Unit 2 xam Review (nswers).notebook 3 Insert Question ere "Whaddup?" 300 pts Lipid soluble signal molecules, such as testosterone, cross the membranes of all cells through diffusion but affect only target cells because most cells lack the Y chromosome required. intracellular receptors are present only in target cells. only target cells possess the cytosolic enzymes that transduce the testosterone. only in target cells is testosterone able to initiate the phosphorylation cascade leading to activated transcription factor. / : intracellular receptors are present only in target cells. 22

23 Unit 2 xam Review (nswers).notebook 4 Insert Question ere "Whaddup?" 400 pts Which of the following provides the best evidence that cell signaling pathways evolved early in the history of life? Signals can be sent long distances by cells. They are seen in "primitive" cells such as yeast. Most signals are received by cell surface receptors. Signal transduction molecules found in distantly related organisms are similar. / : Signal transduction molecules found in distantly related organisms are similar. 23

24 Unit 2 xam Review (nswers).notebook 5 Insert Question ere "Whaddup?" 500 pts Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they are species specific. they can amplify the original signal manyfold. they always lead to the same cellular response. they counter the harmful effects of phosphatases. / : they can amplify the original signal manyfold. 24

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