Question 1

If a cell is placed in a hypotonic solution, which will occur?

Accepted Answer

A)  Salts will move into the cell from the surrounding solution. 
B)  Water will move into the cell from the surrounding solution. 
C)  Salts will move out of the cell into the surrounding solution. 
D)  Water will move out of the cell into the surrounding solution. 
E)  None of the choices will occur. 
A)  Salts will move into the cell from the surrounding solution. 
B)  Water will move into the cell from the surrounding solution. 
C)  Salts will move out of the cell into the surrounding solution. 
D)  Water will move out of the cell into the surrounding solution. 
E)  None of the choices will occur.

Question 2

Which cell junction will allow the movement of molecules between two plant cells?

Accepted Answer

A)  plasmodesmata 
B)  gap 
C)  tight 
D)  adhesion 
A)  plasmodesmata 
B)  gap 
C)  tight 
D)  adhesion

Question 3

Why can nonpolar molecules freely cross the cell membrane while polar molecules require energy?

Accepted Answer

Nonpolar molecules tend to be

Question 4

Which of the following is NOT associated with animal cells?

Accepted Answer

A)  an extracellular matrix 
B)  plasmodesmata 
C)  gap junctions 
D)  adhesion junctions (desmosomes) 
E)  tight junctions 
A)  an extracellular matrix 
B)  plasmodesmata 
C)  gap junctions 
D)  adhesion junctions (desmosomes) 
E)  tight junctions

Question 5

If a living plant were moved from a freshwater aquarium to a saltwater aquarium, which of the following would occur?

Accepted Answer

A)  Nothing. The plant would be fine in either aquarium. 
B)  The plant's cells would take on ions. 
C)  The plant's cells would take on water and will lyse. 
D)  The plant's cells would lose water and plasmolysis would occur. 
A)  Nothing. The plant would be fine in either aquarium. 
B)  The plant's cells would take on ions. 
C)  The plant's cells would take on water and will lyse. 
D)  The plant's cells would lose water and plasmolysis would occur.

Question 6

Red blood cells come in many "blood types" including type A, type B, type AB, type O [lacking proteins A and B], Rh positive, and Rh negative [lacking Rh+] and many others. If blood is transfused, the recipient detects any new or "foreign" proteins. These blood type proteins are

Accepted Answer

A)  in the plasma where they have been secreted by the red blood cells. 
B)  inside the red blood cell cytoplasm. 
C)  on the outer surface of the red blood cell membrane. 
D)  evenly distributed throughout the cell contents and plasma. 
E)  in the red blood cell nucleus. 
A)  in the plasma where they have been secreted by the red blood cells. 
B)  inside the red blood cell cytoplasm. 
C)  on the outer surface of the red blood cell membrane. 
D)  evenly distributed throughout the cell contents and plasma. 
E)  in the red blood cell nucleus.

Question 7

Which cell junction is unique to animals? v: 04_12_2014_QC_47498

Accepted Answer

A)  gap 
B)  tight 
C)  desmosomes 
D)  all are unique to animals 
A)  gap 
B)  tight 
C)  desmosomes 
D)  all are unique to animals

Question 8

In a phospholipid bilayer, the

Accepted Answer

A)  phosphate groups are hydrophobic. 
B)  fatty acid tails are ionized. 
C)  fatty acid tails are hydrophilic. 
D)  proteins are located only between the two layers. 
E)  phosphate heads are oriented toward the exterior of the cell or toward the cytoplasm. 
A)  phosphate groups are hydrophobic. 
B)  fatty acid tails are ionized. 
C)  fatty acid tails are hydrophilic. 
D)  proteins are located only between the two layers. 
E)  phosphate heads are oriented toward the exterior of the cell or toward the cytoplasm.

Question 9

Why does this model of a phospholipids bilayer in Fig. 1 not 'work'?

Accepted Answer

This model does not 'work' because it ha

Question 10

In the sodium-potassium pump, sodium is transported out of the cell and potassium is transported into the cell as ATP is broken by a membrane protein.

Accepted Answer

A) True 
 B)False

Question 11

Plants show turgor pressure when

Accepted Answer

A)  cells are losing water from their water vacuoles. 
B)  cells contain water vacuoles that are full of water. 
C)  water is being used up in photosynthesis. 
D)  water is being evaporated from the leaves. 
A)  cells are losing water from their water vacuoles. 
B)  cells contain water vacuoles that are full of water. 
C)  water is being used up in photosynthesis. 
D)  water is being evaporated from the leaves.

Question 12

Eukaryotic cells are substantially larger than bacterial cells and average over 20 times more volume-per-surface-area than bacterial cells. How can the eukaryotic cell membrane provide this higher rate of exchange of materials?

Accepted Answer

A)  Plasma membrane folds increase the surface area. 
B)  Carrier proteins speed the rate at which a solute crosses the plasma membrane in the direction of decreasing concentration. 
C)  Mitochondria are concentrated near membranes to provide energy for active transport of molecules or ions. 
D)  Large molecules are engulfed by vesicle formation. 
E)  All of the choices are correct. 
A)  Plasma membrane folds increase the surface area. 
B)  Carrier proteins speed the rate at which a solute crosses the plasma membrane in the direction of decreasing concentration. 
C)  Mitochondria are concentrated near membranes to provide energy for active transport of molecules or ions. 
D)  Large molecules are engulfed by vesicle formation. 
E)  All of the choices are correct.

Question 13

A crystal of green dye is added to a beaker of water. The dye will undergo diffusion. After studying the series of beakers from the left to the right, define diffusion and state the ultimate outcome of diffusion?

Accepted Answer

The dye is diffusing from an area of hig

Question 14

Why do membranes self-assemble into their characteristic phospholipids bilayer?

Accepted Answer

Membranes self assemble in their charact

Question 15

Which is the best definition of osmosis?

Accepted Answer

A)  The movement of molecules from an area of their higher concentration to an area of their lower concentration. 
B)  The movement of water across a semi permeable membrane from an area of higher water concentration to an area of lower water concentration. 
C)  The movement of molecules from an area of their lower concentration to an area of their higher concentration. 
D)  The movement of water across a semi permeable membrane from an area of lower water concentration to an area of higher water concentration. 
E)  The movement of a substance against its concentration gradient through the release of energy from ATP. 
A)  The movement of molecules from an area of their higher concentration to an area of their lower concentration. 
B)  The movement of water across a semi permeable membrane from an area of higher water concentration to an area of lower water concentration. 
C)  The movement of molecules from an area of their lower concentration to an area of their higher concentration. 
D)  The movement of water across a semi permeable membrane from an area of lower water concentration to an area of higher water concentration. 
E)  The movement of a substance against its concentration gradient through the release of energy from ATP.

Question 16

Which scenario is most likely to occur if the mitochondria in the kidney cells were to decrease in function?

Accepted Answer

A)  The kidneys would improve in function. 
B)  The kidneys would begin excreting large amounts of waste products. 
C)  The amount of active transport in the kidneys would significantly decrease. 
D)  The amount of active transport in the kidneys would increase. 
A)  The kidneys would improve in function. 
B)  The kidneys would begin excreting large amounts of waste products. 
C)  The amount of active transport in the kidneys would significantly decrease. 
D)  The amount of active transport in the kidneys would increase.

Question 17

Which phrase does NOT describe one of the functions of proteins of the plasma membrane?

Accepted Answer

A)  forming a channel through the membrane 
B)  initiating the replication of the genetic material 
C)  binding to a substance to carry it through the membrane 
D)  acting as a receptor for substances external to the cell 
E)  increasing the rate of a chemical reaction 
A)  forming a channel through the membrane 
B)  initiating the replication of the genetic material 
C)  binding to a substance to carry it through the membrane 
D)  acting as a receptor for substances external to the cell 
E)  increasing the rate of a chemical reaction

Question 18

Which of the following is an example of active transport through a cell membrane?

Accepted Answer

A)  Movement of carbon dioxide out of the blood stream and into the lungs 
B)  Movement of oxygen from the lungs into the bloodstream 
C)  Movement of sweat onto the surface of your skin 
D)  Absorption of glucose from the gut into the bloodstream 
A)  Movement of carbon dioxide out of the blood stream and into the lungs 
B)  Movement of oxygen from the lungs into the bloodstream 
C)  Movement of sweat onto the surface of your skin 
D)  Absorption of glucose from the gut into the bloodstream

Question 19

Which type of molecule will require some amount of energy to cross the cell membrane?

Accepted Answer

A)  glycerol 
B)  polar 
C)  non-polar molecules 
D)  carbon dioxide 
E)  oxygen 
A)  glycerol 
B)  polar 
C)  non-polar molecules 
D)  carbon dioxide 
E)  oxygen

Question 20

A 10% glucose solution is placed in the thistle tube. The thistle tube is placed in a beaker that contains a 5% glucose solution. The solution in the thistle tube is _______ to the solution in the beaker.

Accepted Answer

A)  hypertonic 
B)  hypotonic 
C)  isotonic 
D)  none of the answer choices 
A)  hypertonic 
B)  hypotonic 
C)  isotonic 
D)  none of the answer choices

Exam 5: Membrane Structure and Function

If a cell is placed in a hypotonic solution, which will occur?

Which cell junction will allow the movement of molecules between two plant cells?

Why can nonpolar molecules freely cross the cell membrane while polar molecules require energy?

Which of the following is NOT associated with animal cells?

If a living plant were moved from a freshwater aquarium to a saltwater aquarium, which of the following would occur?

Red blood cells come in many "blood types" including type A, type B, type AB, type O [lacking proteins A and B], Rh positive, and Rh negative [lacking Rh+] and many others. If blood is transfused, the recipient detects any new or "foreign" proteins. These blood type proteins are

Which cell junction is unique to animals? v: 04_12_2014_QC_47498

In a phospholipid bilayer, the

Why does this model of a phospholipids bilayer in Fig. 1 not 'work'?

In the sodium-potassium pump, sodium is transported out of the cell and potassium is transported into the cell as ATP is broken by a membrane protein.

Plants show turgor pressure when

Eukaryotic cells are substantially larger than bacterial cells and average over 20 times more volume-per-surface-area than bacterial cells. How can the eukaryotic cell membrane provide this higher rate of exchange of materials?

A crystal of green dye is added to a beaker of water. The dye will undergo diffusion. After studying the series of beakers from the left to the right, define diffusion and state the ultimate outcome of diffusion?

Why do membranes self-assemble into their characteristic phospholipids bilayer?

Which is the best definition of osmosis?

Which scenario is most likely to occur if the mitochondria in the kidney cells were to decrease in function?

Which phrase does NOT describe one of the functions of proteins of the plasma membrane?

Which of the following is an example of active transport through a cell membrane?

Which type of molecule will require some amount of energy to cross the cell membrane?

A 10% glucose solution is placed in the thistle tube. The thistle tube is placed in a beaker that contains a 5% glucose solution. The solution in the thistle tube is _______ to the solution in the beaker.

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy, Systematics, and Phylogeny

Viruses, Bacteria, and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structureand Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

Red blood cells come in many "blood types" including type A, type B, type AB, type O [lacking proteins A and B], Rh positive, and Rh negative [lacking Rh⁺] and many others. If blood is transfused, the recipient detects any new or "foreign" proteins. These blood type proteins are