Campbell Biology Custom Stony Brook 10 Th Edition
10th Edition
ISBN: 9781269870818
Author: Reece Urry Cain Wasserman Minorsky Jackson
Publisher: PEARSON
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Textbook Question
Chapter 7.1, Problem 2CC
WHAT IF? Ø How would the membrane lipid composition of a native grass found in very warm soil around hot springs compare with that of a native grass found in cooler soil? Explain.
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In each problem below draw an arrow showing which way water will move/flow.
Is the solution hypertonic, hypotonic or isotonic?
A
A
A
B
B
в
Concentration of sugar
А 60%
В 20%
Concentration of sugar
Concentration of sugar
A 45%
В 45%
A 45%
В 70%
Solution is
Solution is
Solution is
A
A
A
B
B
B
Concentration of sugar
A 12%
Concentration of sugar
A 12%
В 15%
Concentration of sugar
A 16%
В 60%
B 10%
Solution is
Solution is
Solution is
A
A
A
B
Concentration of sugar
Concentration of sugar
Concentration of sugar
A 19%
A 44%
В 41%
A 55%
B 41%
B 25%
Solution is
Solution is
Solution is
% Change in Potato
Core Mass
Groups of students in a biology class conduct an experiment to explore the movement of water into and out of plant cells. Each group makes six potato
cores and mneasures the initial masses of the cores. The groups submerge the potato cores in sucrose solutions of differing concentrations that range
from 0.0 M to 1.0 M. After one hour, each group removes the potato cores from the solutions and measures the final masses of the cores. The initial and
final masses of the potato cores are used to calculate a percent change in mass for each core to account for differences in the initial masses. The students
generate a graph using the average percent change in mass for all the groups in the class for each solution.
20
10
0.0
0.2
0.4
0.6
0.8
1.0
-10
-20
-30
-40
Concentration of Sucrose (M)
Based on the data collected, which solution concentration is isotonic to the potato core?
O 0.0 M
O 0.2 M
O 0.6 M
O 1.0 M.
Consider a plant cell. The value for solute concentration in a plant cell is -0.12 MPa and the turgor pressure is 0.12 MPa.
1- What is the water potential in this plant cell?
2- If this plant cell were placed in a solution with water potential of -0.1 MPa, what would happen to the cell? (Hint: explain where the water goes and what that does to the cell).
Chapter 7 Solutions
Campbell Biology Custom Stony Brook 10 Th Edition
Ch. 7.1 - VISUAL SKILLS Carbohydrates are attached to...Ch. 7.1 - WHAT IF? How would the membrane lipid composition...Ch. 7.2 - What property allows O2 and CO2 to cross a lipid...Ch. 7.2 - VISUAL SKILLS Examine Figure 7.2. Why is a...Ch. 7.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 7.3 - How do you think a cell performing cellular...Ch. 7.3 - WHAT IF? If a Paramecium swims from a hypotonic...Ch. 7.4 - Sodium-potassium pumps help nerve cells establish...Ch. 7.4 - VISUAL SKILLS Compare the sodium-potassium pump...Ch. 7.4 - MAKE CONNECTIONS Review the characteristics of...
Ch. 7.5 - As a cell grows, its plasma membrane expands. Does...Ch. 7.5 - DRAW IT Return to Figure 7.9, and circle a patch...Ch. 7.5 - Prob. 3CCCh. 7 - In what ways are membranes crucial to life?Ch. 7 - How do aquaporins affect the permeability of a...Ch. 7 - What happens to a cell placed in a hypertonic...Ch. 7 - ATP is not directly involved in the functioning of...Ch. 7 - Which type of endocytosis involves the binding of...Ch. 7 - In what way do the membranes of a eukaryotic Cell...Ch. 7 - According to the fluid mosaic model of membrane...Ch. 7 - Which of the following factors would tend to...Ch. 7 - Which of the following processes includes all the...Ch. 7 - Prob. 5TYUCh. 7 - DRAW IT An artificial "cell" consisting of an...Ch. 7 - EVOLUTION CONNECTION Paramecium and other...Ch. 7 - Prob. 8TYUCh. 7 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 7 - WRITE ABOUT A THEME: INTERACTIONS A human...Ch. 7 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- . DRAW IT An artificial “cell” consisting of an aqueous solutionenclosed in a selectively permeable membrane is immersed ina beaker containing a different solution, the “environment,”as shown in the accompanying diagram. The membrane ispermeable to water and to the simple sugars glucose and fructosebut impermeable to the disaccharide sucrose.(a) Draw solid arrows to indicate the net movement of solutesinto and/or out of the cell.(b) Is the solution outside the cell isotonic, hypotonic, orhypertonic?(c) Draw a dashed arrow to show the net osmosis, if any. (d) Will the artificial cell becomemore flaccid,more turgid,or stay the same?(e) Eventually, willthe two solutionshave the same ordifferent soluteconcentrations?arrow_forward3) A soil bacteria wishes to open a health spa where the air is not too dry but the premises don't flood frequently either. She is hoping for a soil with a relative humidity between 50-60%. A lawyer acquaintance (a real fungus) is trying to sell her some property. He boasts that the area has a year-round matric potential of about -6.5 MPa, an electrical conductivity (in the pore-water) of 5 dS/m, and a comfortable temperature of 15 oC. The hard-sell lawyer is pressuring her for a quick decision. Does the property meet her requirements?arrow_forwardIn the experimental conditions described below, how many molecules of dextrose do you have to add to the extracellular fluid in order to make it iso-osmotic relative to the intracellular fluid? Pracice 7 Intracellular fluid: • Number of water molecules = 60 Number of Dextrose molecules = 8 • Number of Sucrose molecules = 2 Extracellular fluid: • Number of water molecules = 160 • Number of dextrose molecule = ???? • Number of Sucrose molecules = 0 Enter the number of molecules of dextrose in your answer (format: for 7 enter 7 or 7.00, for 7.5 enter 7.5 or 7.50, for 7.3333 enter 7.33 etc...). Your Answer: Answerarrow_forward
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