CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
3rd Edition
ISBN: 9780134875040
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 6.3, Problem 3CC
MAKE CONNECTIONS Does Figure 6.10a show passive or active transport? Explain. (See Concepts 5.3 and 5.4.)
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10. What appears to be the effect of inserting a protein channel into the membrane on the
movement of molecules across the membrane?
11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar
in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the
phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning.
When a membrane protein assists in the passive transport of molecules across a barrier in the
direction down their concentration gradient (from high concentration to low concentration) it is
called facilitated diffusion. Transport proteins may also be involved in active transport where the
cell uses energy from…
Distinguish between simple diffusion (SD), facilitated diffusion (FD), and active transport (AT) across a membrane for the following questions.
(a) Which processes are energy dependent?
(b) Which processes need some kind of carrier protein(s)?
(c) Which processes can be saturated by substrate?
(d) Which processes can establish a concentration gradient?
(e) How much energy does it take to transport an uncharged substrate in, if its starting inside concentration is 10-fold greater than outside?
How is active transport different from simple diffusion?
Both active transport and simple diffusion transport molecules against the concentration
gradient.
In active transport, molecules are moved down the concentration gradient; on the
B contrary, molecules to be transported in simple diffusion are moved against the
concentration gradient.
In active transport, molecules are transported with the aid of transport proteins; on the
© other hand, molecules to be transported in simple diffusion do not need transport
proteins.
In active transport, molecules that are transported does not need metabolic energy; in
contrast, molecules transported in simple diffusion need metabolic energy.
Chapter 6 Solutions
CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
Ch. 6.1 - MAKE CONNECTIONS How does the second law of...Ch. 6.1 - Describe the forms of energy found in an apple as...Ch. 6.2 - Cellular respiration uses glucose and oxygen,...Ch. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.3 - How does ATP typically transfer energy from...Ch. 6.3 - Prob. 2CCCh. 6.3 - MAKE CONNECTIONS Does Figure 6.10a show passive or...Ch. 6.4 - Many spontaneous reactions occur very slowly. Why...Ch. 6.4 - Why do enzymes act only on very specific...
Ch. 6.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 6.4 - A mature lysosome has an internal pH of around...Ch. 6.5 - How do an activator and an inhibitor have...Ch. 6.5 - Prob. 2CCCh. 6 - Choose the pair of terms that correctly completes...Ch. 6 - Prob. 2TYUCh. 6 - Which of the following metabolic processes can...Ch. 6 - If an enzyme in solution is saturated with...Ch. 6 - Some bacteria are metabolically active in hot...Ch. 6 - If an enzyme is added to a solution where its...Ch. 6 - DRAW IT Using a series of arrows, draw the...Ch. 6 - Prob. 8TYUCh. 6 - SCIENCE, TECHNOLOGY, AND SOCIETY Organophosphates...Ch. 6 - FOCUS ON EVOLUTION A recent revival of the...Ch. 6 - FOCUS ON ENERGY AND MATTER Life requires energy....Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE Explain what is...
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- Cells transporting substances across their membranes is essential. Choose TWO of the following types of cellular transport. ๏osmosis ๏active transport ๏facilitated diffusion ๏endocytosis / exocytosis (a)For each type of transport you choose, describe the transport process. Explain how the organization of cell membrane plays a role the movement of specific molecules across membrane. (b)Using the same transport types, identify a specific cell that utilizes that type of transit (i.e. one cell for each transport type, or two different cell examples), and detail a substance that is transferred. (c)A typical human lymphocyte has a radius of about 10 μm, while a typical bacterium (e.g., S. pneumoniae) has a radius of about 1 μm. Assuming that both cell types are perfectly spherical, compare and contrastthe transport mechanisms for each of these cells.arrow_forwardFor table 3 which molecules were able to move through the membrane and which were not?how do you know? What are some possible explanations for this observation?arrow_forwardPart 1: If a gated channel (not a pump) is specific for potassium ions and based on what you know about concentration gradients, when will the potassium ions move through the channel? a) Is gated channel transport using energy (ATP)? Part 2: Why does the sodium - potassium pump need to use energy (ATP)? a) Define active transport in your own words.arrow_forward
- the game. And the game officially started! The game will work by team. Sakuragi and his team are placed in small submarine shrunk down to microscopic size and injected into a stained living ceili. The teams goai is to find out what is happening in the area because the object is slowly occupying the space where there are many creatures are living. They started their path on the fluid. As they continue their journey, they reached in a transparent layer. In order to make the navigational adjustment, 1. they need to identify this substance. What could be this thing? They scanned the area using an ultra telescope designed by the company that useful for their goal. Upon using the tool they have found out that it contains a wide variety of biological molecules magnification micro 2 There are polar and non - polar region. What are these biomolecules? They tried to get insidearrow_forwardElectrochemical gradients (a) power simple diffusion (b) are established by pinocytosis (c) are necessary for transport by aquaporins (d) are established by concentration gradients (e) are a result of both an electric charge difference and a concentration difference between the two sides of the membranearrow_forwardCalculate the free energy changes at 20°C for the transmembrane movement of Na and K ions using the conditions presented Figure 9.1. Assume the membrane potential is -70 mV. Use 3 significant figures. AG (Na) - AG (K) = kJ. mol ¹ kJ mol2 Aarrow_forward
- Ethanol or Lactic acid G3P Руruvat Glucose G3P Руruvat Acetyl-CoA Citric Acid Охaloacetatearrow_forwardwhat would happen to the transport of sater across a membrane if the aqua poring were non-functional? Would water still be able to cross, why or why not? Please explain in 3-8 sentences only. Thanksarrow_forwardCells transporting substances across their membranes is essential. Choose TWO of the following types of cellular transport. ๏osmosis ๏active transport (b)Using the same transport types, identify a specific cell that utilizes that type of transit (i.e. one cell for each transport type, or two different cell examples), and detail a substance that is transferred. (c)A typical human lymphocyte has a radius of about 10 μm, while a typical bacterium (e.g., S. pneumoniae) has a radius of about 1 μm. Assuming that both cell types are perfectly spherical, compare and contrastthe transport mechanisms for each of these cells.arrow_forward
- Fish Cell Physiology Compare and contrast the movement of salt ion in the tissues of a living fish and the tissue of a dead fish, is it similar? What goes in and goes out of the cell? Is it water or salt, discuss in both the living and the dead fish. Discuss what particular part of the cell and the mechanism of this process.arrow_forward(a)Aquaporins and membrane channel protein in plant and animal,they permit the movement of water across the membrane.Explain why this is necessary.(b) Explain the importance of cell surface membrane to cellarrow_forwardThe comparison of the simple diffusion, facilitated diffusion and active transport are shown in the table below: * Which comparisons are TRUE? Simple Diffusion Facilitated Diffusion Active Transport I Require ATP Does not require ATP Require ATP II Does not involve a Involve a transport Involve a transport transport protein protein protein From a region of higher III From a region of higher concentrațion of substance to a region of lower concentration of From a region of lower concentration of concentration of substance to a region of lower concentration of substance. substance to a region of higher concentration of substance. substance. O I and II only I and III only O Il and III only O I, Il and IIIarrow_forward
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