Microbiology : Introduction - Access
12th Edition
ISBN: 9780133905526
Author: Tortora
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 6R
Compare and contrast the following
- a. simple diffusion and facilitated diffusion
- b. active transport and facilitated diffusion
- c. active transport and group translocation
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Students have asked these similar questions
From the list below choose all which apply to the process of diffusion.
A. Requires energy
B. Passive process
C. Transports with concentration gradient
D. Powered by random motion
E. Transports against concentration gradient.
Which is common between active transport and facilitated diffusion
A Both uses metabolic energy
B Both processes happen with the aid of transport proteins
C Both of them transport molecules from lower to higher concentration
D Both of them transport molecules from higher to lower concentration
1.There are different processes for transport of molecules of ions across cell membranes.
Explain briefly each process
a. Simples diffusion
b. Facilitated diffusion via carrier proteins
c. Facilitated diffusion via ion channels
d. Primary active transport
e. Secondary active transport
f. Endocvtosis
g. Exocytosis
h. Transcytosis
2. List four Physical factors that affect the rate of diffusion and how they will affect it.
3. What kind of molecules can pass through the plasma membrane of the cells through simple diffusion? Give brief discussion.
4. List the three main parts of a cell and explain their functions.
5. Define an organelle. Which organelles are surrounded by a membrane and which are not?
6. What is the key difference between passive and active process?
7. Why RNA transcription can still serve the needs of the cell even if its operation is slow compared to DNA?
Chapter 4 Solutions
Microbiology : Introduction - Access
Ch. 4 - DRAW IT Diagram each of the following flagellar...Ch. 4 - Endospore formation is called (a) _____. It is...Ch. 4 - DRAW IT Draw the bacterial shapes listed in (a),...Ch. 4 - Match the structures in column A to their...Ch. 4 - Why is an endospore called a resting structure? Of...Ch. 4 - Compare and contrast the following a. simple...Ch. 4 - Prob. 7RCh. 4 - Starch is readily metabolized by many cells, but a...Ch. 4 - Match the characteristics of eukaryotic cells in...Ch. 4 - NAME IT What group of microbes is characterized by...
Ch. 4 - Which of the following is not a distinguishing...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which of the following statements best describes...Ch. 4 - Which of the following is false about fimbriae? a....Ch. 4 - Which of the following pairs is mismatched? a....Ch. 4 - Which of the following pairs is mismatched? a....Ch. 4 - You have isolated a motile, gram-positive cell...Ch. 4 - The antibiotic amphothericin B disrupts plasma...Ch. 4 - How can prokaryotic cells be smaller than...Ch. 4 - The smallest eukaryotic cell is the motile alga...Ch. 4 - Two types of prokaryotic cells have been...Ch. 4 - In 1985, a 0.5-mm cell was discovered in...Ch. 4 - When E. coli cells are exposed to a hypertonic...Ch. 4 - Clostridium botulinum is a strict anaerobe; that...Ch. 4 - A South San Francisco child enjoyed bath time at...Ch. 4 - Live cultures of Bacillus thuringiensis (Dipel)...
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- The main force driving movement in diffusion across membranes is due to A. concentration gradients B. Size of the molecules C. Membrane surface area D. Temperature Questionarrow_forwardCells transport sodium ions out of the cell against the sodium concentration gradient. This is an example of: a. facilitated diffusion b. simple diffusion c. diffusion via channel proteins d. endocytosis e. active transportarrow_forwardThe image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-D) A. 1. Which section represents facilitated diffusion?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not?5. What type of solute molecules may be moved by this type of transport? B. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? C. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? D. Which of these sections are considered passive transport? Explain.arrow_forward
- How does each of the following molecule pass through the plasma membrane in the described scenarios? A. Both simple diffusion and facilitated diffusion B. facilitated diffusion C. simple diffusion D. active transport 1. Molecular oxygen (O2) and carbon dioxide (CO2) traveling downtheir concentration gradient. 2. inorganic ions traveling down their concentration gradient 3. glucose traveling against its concentration gradient 4. water molecules (H2O) traveling down their concentration gradientarrow_forwardCompare and contrast passive diffusion, facilitated diffusion, active transport, and group translocation, and provide examples of eacharrow_forwardCompare and contrast the following processes. Give anexample of each to illustrate.a. primary vs secondary active transportb. passive vs facilitated diffusionc. carrier-mediated vs channel-mediated transportarrow_forward
- The image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-C) A. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? B. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? C. Which of these sections are considered passive transport? Explain.arrow_forwardExamine the graph presented here. Using your knowledge of how the processes work, label each curve as representative of either simple diffusion or facilitated diffusion. Explain how you determined which curve was which.arrow_forwardChoose answer of the following Which of the following is incorrect regarding facilitated diffusion?a. It is a passive process.b. It allows the movement of molecules from areas of lowconcentration to areas of high concentration.c. It may use either channel or carrier proteins.d. It allows the rapid transport of glucose across the membrane.arrow_forward
- What is NOT true about diffusion: 1. A form of passive transport. 2. Uses adenosine triphosphate to transport substances across the plasma membrane. 3. Tendency of molecules to move from an area of higher concentration to an area or lower concentration. 4. Classified as either facilitated diffusion or simple diffusion.arrow_forwardDefine the following terms:a. CFTRb. simple diffusionc. facilitated diffusiond. Na+-K+ pumpe. aquaporinarrow_forwardDescribe and explain the difference between: a. Active and passive transport across a membrane. Give an example (can be broad) of a molecule that crosses a membrane for each mechanism. b. Primary vs secondary active transport. Give an example of a molecule(s) that crosses a membrane for each mechanism.arrow_forward
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