Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 4.2, Problem 2TQ
Summary Introduction
To review:
The transporter other than an antiporter that could produce electroneutral coupled transport.
Introduction:
In order to achieve the transportation of molecules across the cell membrane under an active transport, the energy of one chemical gradient is exchanged with that of another. The positively charged ions are the randomly used chemical gradients. A decrease in the concentration of such ions across a membrane leads to the release of energy. The released energy is used by several transport proteins, which then carry out the transportation of other molecules against the concentration gradient. This process is frequently referred to as coupled transport.
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What are three types of energy that can power an active transport pump? Provide
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Chapter 4 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 4.1 - Prob. 1TQCh. 4.2 - Prob. 1TQCh. 4.2 - Prob. 2TQCh. 4.3 - Prob. 1TQCh. 4.3 - Prob. 2TQCh. 4.3 - Prob. 3TQCh. 4.3 - Prob. 4TQCh. 4.4 - Prob. 1TQCh. 4.4 - Prob. 2TQCh. 4.4 - Prob. 3TQ
Ch. 4.4 - Prob. 4TQCh. 4.4 - Prob. 5TQCh. 4.4 - Prob. 6TQCh. 4.4 - Prob. 7TQCh. 4.4 - Prob. 8TQCh. 4.6 - Prob. 1TQCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 1TQCh. 4 - Prob. 2TQCh. 4 - Prob. 3TQCh. 4 - Prob. 4TQCh. 4 - Prob. 5TQCh. 4 - Prob. 6TQCh. 4 - Prob. 7TQ
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- ATP is not directly involved in the functioning of a cotransporter. Why,then, is cotransport considered active transport?arrow_forwardName the three classes of membrane transport proteins. Explain which one or ones of these classes is able to move glucose and which can move bicarbonate (HCO3−) against an electrochemical gradient. In the case of bicarbonate, but not glucose, the ΔG of the transport process has two terms. What are these two terms, and why does the second not apply to glucose? Why are cotransporters often referred to as examples of secondary active transport?arrow_forwardBriefly describe, how P-type transporters helps in transporting ions?arrow_forward
- Whereas electrical currents are carried by electrons in copper wire,they are carried by ions in aqueous solutions. Explain how anactive-transport mechanism can create an electrical current acrossa membrane.arrow_forwardName the three classes of membrane transport proteins. Explain which one or ones of these classes is able to move glucose and which can move bicarbonate (HCO3 −) against an electrochemical gradient. In the case of bicarbonate, but not glucose, the ΔG of the transport process has two terms.What are these two terms, and why does the second not apply to glucose? Why are cotransporters often referred to as examples of secondary active transport?arrow_forwardThe type of transport shown in this figure is best described by which of the following pairs of terms: Low High High Lowarrow_forward
- What are the materials transported and the cell membrane structure involved in Secondary Active Transport?arrow_forwardWhat are the materials transported and the cell membrane structure involved in Primary Active Transport?arrow_forwardIn the Sodium/Potassium pump, how is ATP used in the process of Active Transport? What is the goal and purpose of the Sodium/Potassium pump?arrow_forward
- Why is ATP required for active transport?arrow_forwardWhat are the distinctions between facilitated difussion, primary active transport and secondary active transport?arrow_forwardThe parasite Trypanosoma brucei, which causes sleeping sickness, uses proline as an energy source during one stage of its life cycle. The properties of this proline-specific transporter were investigated in a series of experiments. L-hydroxyproline inhibited the transporter. D-proline did not inhibit the transporter. Na*, K*, and pH changes did not affect the transporter. Which of the following is a reasonable hypothesis based on this data? The proline transporter is a Na+-K+ ion pump. The proline transporter cleaves amide bonds. The proline transporter is stereospecific. The proline transporter requires metal-ion catalysis. The proline transporter has an essential ionizable histidine residue,arrow_forward
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