Question 1

Describe some of the activities performed by membrane proteins in multicellular organisms.

Accepted Answer

Concepts to Consider: Formatio

Question 2

Match between columns
                        Premises: protein pumps

Accepted Answer

The Answer of Anchor cell to extracellular matrix and Transmit is...

Question 3

Biological membranes are one-dimensional fluids.

Accepted Answer

A) True 
 B)False

Question 4

Figure 5-1 ​
 
Refer to the accompanying figure. Which best describes the red blood cells in Fig. B?

Accepted Answer

A)  These red blood cells have been placed in an isotonic solution. 
B)  These red blood cells have swollen in response to a hypertonic external solution. 
C)  These red blood cells have swollen in response to a hypotonic external solution. 
D)  These red blood cells have shrunk in response to a hypertonic external solution. 
E)  These red blood cells have shrunk in response to a hypotonic external solution. 
A)  These red blood cells have been placed in an isotonic solution. 
B)  These red blood cells have swollen in response to a hypertonic external solution. 
C)  These red blood cells have swollen in response to a hypotonic external solution. 
D)  These red blood cells have shrunk in response to a hypertonic external solution. 
E)  These red blood cells have shrunk in response to a hypotonic external solution.

Question 5

What is required for facilitated diffusion to take place?

Accepted Answer

A)  Energy from ATP 
B)  A transmembrane protein 
C)  The transport of large food particles 
D)  The transport of small nonpolar molecules 
E)  Movement down a concentration gradient 
A)  Energy from ATP 
B)  A transmembrane protein 
C)  The transport of large food particles 
D)  The transport of small nonpolar molecules 
E)  Movement down a concentration gradient

Question 6

Mutations to ABC transporter genes contribute to cystic fibrosis.

Accepted Answer

A) True 
 B)False

Question 7

Match between columns
                        Premises: integrins

Accepted Answer

The Answer of Transmit information into cell and Use ATP is...

Question 8

Once ligand molecules bind to receptors in coated pits of a plasma membrane, the next step of receptor-mediated endocytosis would be

Accepted Answer

A)  coating detaches from vesicle. 
B)  coated vesicle forms by endocytosis. 
C)  ligands separate from receptors, which are recycled. 
D)  contents of secondary lysosome are digested and released into the cytosol. 
E)  endosome fuses with primary lysosome, forming secondary lysosome. 
A)  coating detaches from vesicle. 
B)  coated vesicle forms by endocytosis. 
C)  ligands separate from receptors, which are recycled. 
D)  contents of secondary lysosome are digested and released into the cytosol. 
E)  endosome fuses with primary lysosome, forming secondary lysosome.

Question 9

Sodium-potassium pumps help to maintain a separation of charges across the plasma membrane, which is called the _________________.

Accepted Answer

A)  symporter 
B)  macrophage 
C)  membrane potential 
D)  proton gradient 
E)  antiporter 
A)  symporter 
B)  macrophage 
C)  membrane potential 
D)  proton gradient 
E)  antiporter

Question 10

In the sodium-potassium pump, sodium ion release causes the carrier protein to return to its original shape and releases two K+ ions into the cell. 
 ​

Accepted Answer

A) True 
 B)False

Question 11

What process halts the net movement of water from a hypotonic solution into a plant's cells and often provides the structural support to many plants?

Accepted Answer

A)  Plasmolysis 
B)  Turgor pressure 
C)  Osmotic pressure 
D)  Facilitated diffusion 
E)  Dynamic equilibrium 
A)  Plasmolysis 
B)  Turgor pressure 
C)  Osmotic pressure 
D)  Facilitated diffusion 
E)  Dynamic equilibrium

Question 12

When the net movement of water in and out a cell is zero, that solution is said to be

Accepted Answer

A)  osmotic. 
B)  isotonic. 
C)  hypotonic. 
D)  hypertonic. 
E)  pressurized. 
A)  osmotic. 
B)  isotonic. 
C)  hypotonic. 
D)  hypertonic. 
E)  pressurized.

Question 13

What have studies of glucose transport in liposomes revealed?

Accepted Answer

A)  Glucose is transported against a concentration gradient. 
B)  Glucose moves readily across the membrane by simple diffusion. 
C)  Glucose phosphates move readily across the membrane by simple diffusion. 
D)  The binding of glucose triggers a conformational change in the carrier protein. 
E)  The transport of solutes via carrier proteins is faster than via channel proteins. 
A)  Glucose is transported against a concentration gradient. 
B)  Glucose moves readily across the membrane by simple diffusion. 
C)  Glucose phosphates move readily across the membrane by simple diffusion. 
D)  The binding of glucose triggers a conformational change in the carrier protein. 
E)  The transport of solutes via carrier proteins is faster than via channel proteins.

Question 14

Which statement about plasma membranes is false ?

Accepted Answer

A)  Plasma membranes regulate the passage of materials. 
B)  Plasma membranes divide the cell into compartments. 
C)  Plasma membranes serve as surfaces for chemical reactions. 
D)  Plasma membranes prevent communication with other cells. 
E)  Plasma membranes transmit signals between the environment and the interior of the cell. 
A)  Plasma membranes regulate the passage of materials. 
B)  Plasma membranes divide the cell into compartments. 
C)  Plasma membranes serve as surfaces for chemical reactions. 
D)  Plasma membranes prevent communication with other cells. 
E)  Plasma membranes transmit signals between the environment and the interior of the cell.

Question 15

Peripheral proteins are linked to either surface of the plasma membrane by

Accepted Answer

A)  covalent disulfide bonds. 
B)  associating with fatty acids through hydrophobic interactions. 
C)  associating with glycoproteins on the inner membrane surface. 
D)  bonding to integral proteins through noncovalent interactions. 
E)  embedding in only one side of the membrane. 
A)  covalent disulfide bonds. 
B)  associating with fatty acids through hydrophobic interactions. 
C)  associating with glycoproteins on the inner membrane surface. 
D)  bonding to integral proteins through noncovalent interactions. 
E)  embedding in only one side of the membrane.

Question 16

A person has a genetic disease that prevents the phospholipids in the plasma membrane of the white blood cells from freely fusing with the other membranes within the cell. How would this disease affect phagocytosis?

Accepted Answer

A)  Endocytosis would not occur. 
B)  Lysosomes would not be formed. 
C)  Facilitated diffusion would not occur. 
D)  Lysosomes would be formed lacking hydrolytic enzymes. 
E)  The phagocytic vacuole would not fuse with the lysosome. 
A)  Endocytosis would not occur. 
B)  Lysosomes would not be formed. 
C)  Facilitated diffusion would not occur. 
D)  Lysosomes would be formed lacking hydrolytic enzymes. 
E)  The phagocytic vacuole would not fuse with the lysosome.

Question 17

Figure 5-2  
 
What cellular process is represented in the accompanying figure?

Accepted Answer

A)  Lysis 
B)  Exocytosis 
C)  Cotransport 
D)  Pinocytosis 
E)  Facilitated diffusion 
A)  Lysis 
B)  Exocytosis 
C)  Cotransport 
D)  Pinocytosis 
E)  Facilitated diffusion

Question 18

Which of the following statements about phospholipids is false ?

Accepted Answer

A)  They are amphipathic molecules. 
B)  They contain three fatty acids chains. 
C)  They contain a polar organic group attached to a phosphate group. 
D)  They have cylindrical shapes that allow them to associate with water most easily as a bilayer structure. 
E)  They have two distinct regions, one strongly hydrophobic and the other strongly hydrophilic. 
A)  They are amphipathic molecules. 
B)  They contain three fatty acids chains. 
C)  They contain a polar organic group attached to a phosphate group. 
D)  They have cylindrical shapes that allow them to associate with water most easily as a bilayer structure. 
E)  They have two distinct regions, one strongly hydrophobic and the other strongly hydrophilic.

Question 19

Which of the following is not a property of membranes?

Accepted Answer

A)  They divide the cell into compartments. 
B)  They transmit signals between the environment and the interior of the cell. 
C)  They serve as surfaces for chemical reactions. 
D)  They adhere to and communicate with other cells. 
E)  They inhibit the passage of materials. 
A)  They divide the cell into compartments. 
B)  They transmit signals between the environment and the interior of the cell. 
C)  They serve as surfaces for chemical reactions. 
D)  They adhere to and communicate with other cells. 
E)  They inhibit the passage of materials.

Question 20

Fluid that has a higher osmotic pressure than a cell is called ___________.

Accepted Answer

A)  hypotonic 
B)  hypertonic 
C)  turgor pressure 
D)  isotonic 
E)  plasmolysis 
A)  hypotonic 
B)  hypertonic 
C)  turgor pressure 
D)  isotonic 
E)  plasmolysis

Exam 5: Biological Membranes

Describe some of the activities performed by membrane proteins in multicellular organisms.

Biological membranes are one-dimensional fluids.

Figure 5-1 ​ Refer to the accompanying figure. Which best describes the red blood cells in Fig. B?

What is required for facilitated diffusion to take place?

Mutations to ABC transporter genes contribute to cystic fibrosis.

Once ligand molecules bind to receptors in coated pits of a plasma membrane, the next step of receptor-mediated endocytosis would be

Sodium-potassium pumps help to maintain a separation of charges across the plasma membrane, which is called the _________________.

In the sodium-potassium pump, sodium ion release causes the carrier protein to return to its original shape and releases two K+ ions into the cell. ​

What process halts the net movement of water from a hypotonic solution into a plant's cells and often provides the structural support to many plants?

When the net movement of water in and out a cell is zero, that solution is said to be

What have studies of glucose transport in liposomes revealed?

Which statement about plasma membranes is false ?

Peripheral proteins are linked to either surface of the plasma membrane by

A person has a genetic disease that prevents the phospholipids in the plasma membrane of the white blood cells from freely fusing with the other membranes within the cell. How would this disease affect phagocytosis?

Figure 5-2 What cellular process is represented in the accompanying figure?

Which of the following statements about phospholipids is false ?

Which of the following is not a property of membranes?

Fluid that has a higher osmotic pressure than a cell is called ___________.

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

DNA: The Carrier of Genetic Information

Gene Expression

Gene Regulation

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

Figure 5-1 Refer to the accompanying figure. Which best describes the red blood cells in Fig. B?

In the sodium-potassium pump, sodium ion release causes the carrier protein to return to its original shape and releases two K⁺ ions into the cell.