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Which of the following are accurate statements regarding membrane transport? i.…

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Wize University Biology Textbook > Energy & Metabolism

Types of Energy [Potential, Kinetic, Free & Activation]

7 Activities

Wize University Biology Textbook > The Plasma Membrane

Active Transport

3 Activities

Wize University Biology Textbook > The Plasma Membrane

Passive Transport

4 Activities

Which of the following are accurate statements regarding membrane transport?
i. The entropy of the system decreases during active transport which is why it requires the use of ATP
ii. Passive diffusion functions because of an increase in entropy
iii. The rate of facilitated diffusion is limited by the amount of available ion channels
iv. Protons (H+) are only able to move through passive diffusion

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C6H12O6 + 6O2 --> 6CO2 +6H2O is the balanced chemical equation for respiration. Is the process exergonic or endergonic?
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Coupled Reactions
What is the gibbs free energy of reaction for a coupled reaction where one process has a standard free energy change of +43 kJ/mol and the other has a standard free energy change of -16kJ/mol?
Is this coupled reaction spontaneous or non-spontaneous?
High transfer potential: Similar to 2014 Question 8
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Free Energy
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Wize Exam Practice Questions:
Which of the following enzymes catalyzes a reversible reaction?
Similar to 2018 exam Q4
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High transfer potential: Similar to 2014 Question 8
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Coupled Reactions
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Is this coupled reaction spontaneous or non-spontaneous?
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What is FALSE about this energy diagram of an uncatalyzed reaction?
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Free Energy
How can unfavourable reactions occur in a cell?
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Practice: What is Gibbs Free Energy?
What does Gibbs free energy determine?
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i. The native conformation of a protein is determined by the structure with the lowest free energy
ii. Denaturation of a protein results from high temperatures or exposure to chemicals like urea
Practice: Thermodynamics
Which enthalpic and entropic combinations will result in a spontaneous bilayer formation?
Which of the following would result in spontaneous membrane transport?
Using Gibb's Free Energy, an example
A biochemical pathway produces metabolite E. This pathway consists of A, B, C and D intermediates that require enzymes 1, 2, 3 and 4 to catalyze each step of the reaction.
a. Given the following information about each reaction, state which reactions are exergonic or endergonic. Where possible, state which reactions are exothermic or endothermic.
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Given the below steps to a biological reaction, what can you infer about each step? What can you predict about the reaction as a whole?
Using Gibb's Free Energy, an example
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a. Given the following information about each reaction, state which reactions are exergonic or endergonic. Where possible, state which reactions are exothermic or endothermic.
i. A → B, ΔG = +3
Given the below steps to a biological reaction, what can you infer about each step? What can you predict about the reaction as a whole?
(i.e. what is ΔGTotal\Delta G_{Total} )
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A reaction with a positive ΔG is considered...
Which of the following have a negative ΔG?
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More Active Transport Questions:
Active transport
Active transport requires which of the following
Which of the following graphs represents the transport of lactose by cells that use both facilitated diffusion and active transport for lactose? The inhibitor added is an ATP inhibitor.
Practice: Transport
How would each of the following molecules be transported into the cell? (aimple diffusion, facilitated diffusion, primary active transport, or secondary active transport).
1.
2.
Practice: ATP
What would happen to transport if cells could not produce ATP?
Practice: Membrane Transport 3
You are running an experiment in the lab to determine if your bacterial cells take up lactose using active transport, facilitated diffusion, or both. You add an ATP inhibitor to the culture and measure the ratio of lactose inside the cell vs. outside the cell over time. Based on the graph below, which type of transport is used by the cells?
Practice: Membrane Transport 1
By what method would you predict that these molecules would enter the cell?
a) Oxygen:
b) Potassium:
Which of the following is true regarding membrane transport?
Given the following graph, which best describes this type of transport?
Which of the following directly requires an input of energy?
Which of the following requires ATP?
More Passive Transport Questions:
Facilitated diffusion
Define facilitated diffusion (do the best you can!)
Which of the following graphs represents the transport of lactose by cells that use both facilitated diffusion and active transport for lactose? The inhibitor added is an ATP inhibitor.
What factors allow a molecule to enter a cell by diffusion? Select all that apply
Practice: Transport
How would each of the following molecules be transported into the cell? (aimple diffusion, facilitated diffusion, primary active transport, or secondary active transport).
1.
2.
Practice: Membrane Transport 3
You are running an experiment in the lab to determine if your bacterial cells take up lactose using active transport, facilitated diffusion, or both. You add an ATP inhibitor to the culture and measure the ratio of lactose inside the cell vs. outside the cell over time. Based on the graph below, which type of transport is used by the cells?
Practice: Membrane Transport 1
By what method would you predict that these molecules would enter the cell?
a) Oxygen:
b) Potassium:
Which of the following is true regarding membrane transport?
How do hydrophobic molecules (such as O2, steroids etc.) pass through phospholipid bilayers?
How is the action of carrier proteins best described?
Voltage gated describes what type of transport?
What type of membrane transport is shown below?
Which of the following requires ATP?
How do inorganic ions pass through a cell membrane?