Question 1

Which of the following is NOT a characteristic of active transport?

Accepted Answer

A) sensitive to metabolic poisons 
B) can be coupled with passive transport to generate the energy necessary for active transport 
C) can work as symports or antiports 
D) exclusively move one molecule at a time in a unidirectional manner 
E) all of the above 
A) sensitive to metabolic poisons 
B) can be coupled with passive transport to generate the energy necessary for active transport 
C) can work as symports or antiports 
D) exclusively move one molecule at a time in a unidirectional manner 
E) all of the above

Question 2

The type of ATPases associated with the integral binding of ATP as part of the transport process is the

Accepted Answer

A) V type. 
B) F type. 
C) ABC type. 
D) P type. 
A) V type. 
B) F type. 
C) ABC type. 
D) P type.

Question 3

Which of the following is NOT a characteristic of passive transport?

Accepted Answer

A) The energy for transport is generated by the molecular bonds of the substance being transported. 
B) It is specific for the molecule being transported. 
C) It requires binding of the molecule to be transported. 
D) Transport of the substance is the result of a conformational change. 
E) The energy for transport is generated by the gradient of the substance being transported. 
A) The energy for transport is generated by the molecular bonds of the substance being transported. 
B) It is specific for the molecule being transported. 
C) It requires binding of the molecule to be transported. 
D) Transport of the substance is the result of a conformational change. 
E) The energy for transport is generated by the gradient of the substance being transported.

Question 4

Which of the following is/are TRUE with regard to water movement in osmosis?

Accepted Answer

A) hypotonic -hypertonic 
B) hypertonic -hypotonic 
C) hypertonic -isotonic 
D) isotonic -hypotonic 
E) both choices C and D 
A) hypotonic -hypertonic 
B) hypertonic -hypotonic 
C) hypertonic -isotonic 
D) isotonic -hypotonic 
E) both choices C and D

Question 5

Base your answers to the questions below on the following information:
A cell biologist interested in the transport of calcium ions (Ca2+)across the plasma membrane of bacterial cells made the following measurements on bacterial cells at 25°C:
Vm = - 150 mV [Ca2+] inside = 20 mM [Ca2+] outside = 0.4 mM
-Assuming no change in either the internal or external calcium ion concentration, at what membrane potential would there be no net movement of calcium across the membrane?

Accepted Answer

A) 0 mV 
B) +50 mV 
C) +25 mV 
D) - 50 mV 
E) - 25 mV 
A) 0 mV 
B) +50 mV 
C) +25 mV 
D) - 50 mV 
E) - 25 mV

Question 6

Base your answers to the questions on the following information:
For a particular cell, the concentration of sucrose is 10 mM on the inside of the cell and 0.5 mM on the outside, whereas the concentration of sodium ions (Na+)is 0.5 mM on the inside of the cell and 10 mM on the outside. The membrane potential is - 150 mV, and the temperature is 25°C.
Constants: R = 1.987 cal/mol degree; T = 25°C = 298 K; F = 23,062 cal/mole volt
-What is the OG' for the inward transport of sucrose?

Accepted Answer

A) +1.774 kcal/mol; an endergonic reaction 
B) +1.774 kcal/mol; an exergonic reaction 
C) - 1.774 kcal/mol; an exergonic reaction 
D) - 1.774 kcal/mol; an endergonic reaction 
E) none of the above 
A) +1.774 kcal/mol; an endergonic reaction 
B) +1.774 kcal/mol; an exergonic reaction 
C) - 1.774 kcal/mol; an exergonic reaction 
D) - 1.774 kcal/mol; an endergonic reaction 
E) none of the above

Question 7

In bacteria, the porins have the unique ability to transport

Accepted Answer

A) any molecule, regardless of properties or size. 
B) hydrophobic molecules of a particular size. 
C) all hydrophilic molecules. 
D) all hydrophobic molecules. 
E) hydrophilic molecules of a particular size. 
A) any molecule, regardless of properties or size. 
B) hydrophobic molecules of a particular size. 
C) all hydrophilic molecules. 
D) all hydrophobic molecules. 
E) hydrophilic molecules of a particular size.

Question 8

The bacteriorhodopsin proton pump creates a proton gradient necessary in the process of anoxygenic photosynthesis. The energy necessary to drive this pump is generated by

Accepted Answer

A) light energy. 
B) GTP hydrolysis. 
C) ATP hydrolysis. 
D) the rhodopsin pigment directly. 
E) the proton gradient itself. 
A) light energy. 
B) GTP hydrolysis. 
C) ATP hydrolysis. 
D) the rhodopsin pigment directly. 
E) the proton gradient itself.

Question 9

An example of indirect active transport is

Accepted Answer

A) P- type ATPases. 
B) Na+/K+ pumps. 
C) ABC- type ATPases. 
D) Na+/glucose symport. 
E) both choice B and C 
A) P- type ATPases. 
B) Na+/K+ pumps. 
C) ABC- type ATPases. 
D) Na+/glucose symport. 
E) both choice B and C

Question 10

The transport of two molecules across the cell membrane in different directions is called
.

Accepted Answer

The answer of The transport of two molecules across the...

Question 11

Animal cells use exocytosis to secrete all of the following EXCEPT

Accepted Answer

A) cell wall material. 
B) milk proteins. 
C) peptide hormones. 
D) mucus. 
E) digestive enzymes. 
A) cell wall material. 
B) milk proteins. 
C) peptide hormones. 
D) mucus. 
E) digestive enzymes.

Question 12

Mutations in bacterial porins can lead to antibiotic resistance typically by

Accepted Answer

A) closing the a- helix of the porin. 
B) limiting the passage of nonpolar substances. 
C) disrupting the voltage of the gated channel. 
D) blocking entry of the antibiotic. 
E) all of the above 
A) closing the a- helix of the porin. 
B) limiting the passage of nonpolar substances. 
C) disrupting the voltage of the gated channel. 
D) blocking entry of the antibiotic. 
E) all of the above

Question 13

Uptake of food particles by trapping them within an invagination of the plasma membrane is called .

Accepted Answer

The answer of Uptake of food particles by trapping them...

Question 14

You wish to dehydrate a piece of meat using solutions of varying salt concentrations. The best concentration to use would be

Accepted Answer

A) 1%. 
B) 0.09%. 
C) 10%. 
D) 0.9%. 
E) 0.01%. 
A) 1%. 
B) 0.09%. 
C) 10%. 
D) 0.9%. 
E) 0.01%.

Question 15

Cystic fibrosis is the result of a malfunction of the cell in transporting which of the following ions?

Accepted Answer

A) Cl- 
B) OH- 
C) Na+ 
D) K+ 
E) glucose 
A) Cl- 
B) OH- 
C) Na+ 
D) K+ 
E) glucose

Which of the following is NOT a characteristic of active transport?

The type of ATPases associated with the integral binding of ATP as part of the transport process is the

Which of the following is NOT a characteristic of passive transport?

Which of the following is/are TRUE with regard to water movement in osmosis?

In bacteria, the porins have the unique ability to transport

The bacteriorhodopsin proton pump creates a proton gradient necessary in the process of anoxygenic photosynthesis. The energy necessary to drive this pump is generated by

An example of indirect active transport is

The transport of two molecules across the cell membrane in different directions is called .

Animal cells use exocytosis to secrete all of the following EXCEPT

Mutations in bacterial porins can lead to antibiotic resistance typically by

Uptake of food particles by trapping them within an invagination of the plasma membrane is called .

You wish to dehydrate a piece of meat using solutions of varying salt concentrations. The best concentration to use would be

Cystic fibrosis is the result of a malfunction of the cell in transporting which of the following ions?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

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Exam 8: Transport Across Membranes: Overcoming the Permeability Barrier

Which of the following is NOT a characteristic of active transport?

The type of ATPases associated with the integral binding of ATP as part of the transport process is the

Which of the following is NOT a characteristic of passive transport?

Which of the following is/are TRUE with regard to water movement in osmosis?

In bacteria, the porins have the unique ability to transport

The bacteriorhodopsin proton pump creates a proton gradient necessary in the process of anoxygenic photosynthesis. The energy necessary to drive this pump is generated by

An example of indirect active transport is

The transport of two molecules across the cell membrane in different directions is called .

Animal cells use exocytosis to secrete all of the following EXCEPT

Mutations in bacterial porins can lead to antibiotic resistance typically by

Uptake of food particles by trapping them within an invagination of the plasma membrane is called .

You wish to dehydrate a piece of meat using solutions of varying salt concentrations. The best concentration to use would be

Cystic fibrosis is the result of a malfunction of the cell in transporting which of the following ions?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters