Chapter 2 Section 1 Reading Quiz

*BRITISH EDUCATION SCHOOL* *Grade 9 - English Language - Literature* *Chapter 5: The Young Tulip-grower - "The Black Tulip"* * *Section A: Reading Comprehension [12 Marks]* Answer in complete sentences. 2 marks each. 1. Describe Cornelius’s feelings and exact words when he looked at the 3 bulbs. What do they show about his character? 2. Why did Cornelius choose to save the bulbs before reading Craeke’s letter? What does this tell us about his priorities? 3. Explain how Cornelius hid the bulbs from the soldiers. Why was this action risky? 4. Why was Isaac Boxtel watching Cornelius’s house? Was he happy or sad about Cornelius’s arrest? Give evidence. 5. What important information did Isaac learn from Cornelius’s notebook? How did this change his plan? 6. Compare Cornelius and Isaac. Who loves the tulips more? Give one reason for each character. *Section B: Vocabulary in Context [8 Marks]* Choose the best meaning of the underlined word. 1 mark each. 1. Cornelius was *surprised* when Craeke ran in. a) happy b) shocked c) angry d) sleepy 2. He picked up the bulbs *carefully*. a) quickly b) with attention c) loudly d) angrily 3. The judge said Cornelius had papers of a *traitor*. a) hero b) friend c) person who betrays his country d) servant 4. The house was *empty* when Isaac entered. a) full of people b) with no one inside c) very big d) very clean 5. Cornelius thanked God the bulbs were not *damaged*. a) broken b) painted c) lost d) old 6. Isaac looked through his *telescope*. a) book b) tool for seeing far c) gun d) letter 7. Cornelius was not *frightened* of the soldiers. a) afraid b) excited c) hungry d) tired 8. Isaac was *jealous* of Cornelius. a) loved him b) wanted what he had c) helped him d) ignored him *Section C: Grammar - Past Continuous vs Past Simple [6 Marks]* Fill in with correct verb form. 1 mark each. 1. While Cornelius ............at the bulbs, Craeke ran into the room. 2. The servant .........that soldiers were coming to arrest him. 3. Isaac ............Cornelius’s house with his telescope all day. 4. When the judge arrived, Cornelius ....... the bulbs in his pocket. 5. The soldiers .........into the room while Cornelius was talking. 6. Isaac .......... the notebook after he searched all the drawers.[look][say][watch][put][run][find] *D* Who Said, write the speaker 1. "Next year, these bulbs will be black tulips. I am the happiest man!" 2. "Please, read this letter immediately, sir!" 3. "You must give that package to me. It is not yours!" 4. "Good! The soldiers will take Cornelius to The Hague. Then they will kill him." 5. "I cannot wait! He has come from The Hague." 6. "None of these was a black tulip!" *E* write your own answer according to your understanding to the current chapter. 1. If you were Cornelius, would you save the bulbs or read the letter first? Give 2 reasons for your choice. [2 marks] 2. Do you think Isaac is a villain or just ambitious? Explain your opinion with evidence from the chapter. [2 marks] *F* Complete the quotes from the chapter. 1. "I must put these bulbs safely in a ........... 2. "The bulbs are not ............I thank God for that." 3. "Last January, Cornelius De Witt left a package of papers in this ............ 4. "Today I have three small tulip from one large bulb. These bulbs will have flowers in the spring ..................

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In many cases, cells must move materials from an area of lower concentration to an area of higher concentration, or “up” their concentration gradient. Such movement of materials is known as active transport. Unlike passive transport, active transport requires a cell to expend energy. CELL MEMBRANE PUMPS Ion channels and carrier proteins not only assist in passive trans- port but also help with some types of active transport. The car- rier proteins that serve in active transport are often called cell membrane “pumps” because they move substances from lower to higher concentrations. Carrier proteins involved in facilitated diffusion and those involved in active transport are very similar. In both, the molecule first binds to a specific kind of carrier protein on one side of the cell membrane. Once it is bound to the molecule, the protein changes shape, shielding the molecule from the hydrophobic interior of the phospholipid bilayer. The protein then transports the molecule through the membrane and releases it on the other side. However, cell membrane pumps require energy. Most often the energy needed for active transport is supplied directly or indirectly by ATP. Sodium-Potassium Pump One example of active transport in animal cells involves a carrier protein known as the sodium-potassium pump. As its name sug- gests, this protein transports Na ions and K ions up their con- centration gradients. To function normally, some animal cells must have a higher concentration of Na ions outside the cell and a higher concentration of K ions inside the cell. The sodium- potassium pump maintains these concentration differences. Follow the steps in Figure 5-6 on the next page to see how the sodium-potassium pump operates. First, three Na ions bind to the carrier protein on the cytosol side of the membrane, as shown in step . At the same time, the carrier protein removes a phosphate group from a molecule of ATP. As you can see in step , the phos- phate group from the ATP molecule binds to the carrier protein. Step shows how the removal of the phosphate group from ATP supplies the energy needed to change the shape of the carrier pro- tein. With its new shape, the protein carries the three Na ions through the membrane and then forces the Na ions outside the cell where the Na concentration must remain high. 3 2 1 SECTION 2 OBJECTIVES ● Distinguish between passive transport and active transport. ● Explain how the sodium-potassium pump operates. ● Compare endocytosis and exocytosis. VOCABULARY active transport sodium-potassium pump endocytosis vesicle pinocytosis phagocytosis phagocyte exocytosis www.scilinks.org Topic: Active Transport Keyword: HM60018 mb06se_homs02.qxd 5/18/07 11:02 AM Page 103 104 CHAPTER 5 K+ K+ K+ K+ K+ K+ INSIDE OF CELL OUTSIDE OF CELL Carrier protein Cell membrane P P P P Na+ Na+ Na+ ATP ADP Na+ Na+ Na+ Na+ Na+ Na+ 1 2 3 4 5 6 At this point, the carrier protein has the shape it needs to bind two K ions outside the cell, as step shows. When the K ions bind, the phosphate group is released, as indicated in step , and the carrier protein restores its original shape. As shown in step this time, the change in shape causes the carrier protein to release the two K ions inside the cell. At this point the carrier protein is ready to begin the process again. Thus, a complete cycle of the sodium-potassium pump transports three Na ions out of the cell and two K ions into the cell. At top speed, the sodium-potassium pump can transport about 450 Na ions and 300 K ions per second. The exchange of three Na ions for two K ions creates an electrical gradient across the cell membrane. That is, the outside of the membrane becomes positively charged relative to the inside of the membrane, which becomes relatively negative. In this way, the two sides of the cell membrane are like the positive and nega- tive terminals of a battery. This difference in charge is important for the conduction of electrical impulses along nerve cells. The sodium-potassium pump is only one example of a cell membrane pump. Other pumps work in similar ways to transport important metabolic materials across cell membranes.

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