Question 1

What should the tonicity of the distilled water be compared to body cells?

Accepted Answer

A)  It should be isotonic to the cells. 
B)  It should be hypotonic to the cells. 
C)  It should be protonic to the cells. 
D)  It should be hypertonic to the cells. 
A)  It should be isotonic to the cells. 
B)  It should be hypotonic to the cells. 
C)  It should be protonic to the cells. 
D)  It should be hypertonic to the cells.

Question 2

Which environment is ideal for plant cells, and which is best for animal cells?

Accepted Answer

A)  isotonic for plant cells, and hypertonic for animal cells 
B)  isotonic for plant cells, and hypotonic for animal cells 
C)  hypotonic for plant cells, and isotonic for animal cells 
D)  hypotonic for plant cells, and hypertonic for animal cells 
A)  isotonic for plant cells, and hypertonic for animal cells 
B)  isotonic for plant cells, and hypotonic for animal cells 
C)  hypotonic for plant cells, and isotonic for animal cells 
D)  hypotonic for plant cells, and hypertonic for animal cells

Question 3

Suppose water moves across a membrane from an area of high water concentration to an area of low water concentration. What is this an example of?

Accepted Answer

A)  both diffusion and osmosis 
B)  both osmosis and active transport 
C)  both diffusion and endocytosis 
D)  both endocytosis and active transport 
A)  both diffusion and osmosis 
B)  both osmosis and active transport 
C)  both diffusion and endocytosis 
D)  both endocytosis and active transport

Question 4

Which molecules will pass most easily through a cell membrane by diffusion?

Accepted Answer

A)  large, hydrophilic molecules 
B)  large, polar molecules 
C)  small, hydrophobic molecules 
D)  ionic molecules 
A)  large, hydrophilic molecules 
B)  large, polar molecules 
C)  small, hydrophobic molecules 
D)  ionic molecules

Question 5

One component of the cell membrane functions as a selective barrier, and one component has specific functions such as transport, recognizing other cells, and binding to other cells. Which pair of terms refers to these two components, respectively?

Accepted Answer

A)  carbohydrate and nucleic acid 
B)  lipid and carbohydrate 
C)  protein and carbohydrate 
D)  lipid and protein 
A)  carbohydrate and nucleic acid 
B)  lipid and carbohydrate 
C)  protein and carbohydrate 
D)  lipid and protein

Question 6

What is responsible for the selective permeability of a cell membrane?

Accepted Answer

A)  the position of cholesterol in the membrane bilayer 
B)  the integral proteins of the membrane 
C)  the hydrophobic core formed by the phospholipid tails 
D)  the hydrophilic end facing the cell exterior 
A)  the position of cholesterol in the membrane bilayer 
B)  the integral proteins of the membrane 
C)  the hydrophobic core formed by the phospholipid tails 
D)  the hydrophilic end facing the cell exterior

Question 7

What two processes are involved when eukaryotic cells import and secrete large molecules?

Accepted Answer

A)  exocytosis when importing and diffusion when secreting 
B)  exocytosis when importing and endocytosis when secreting 
C)  endocytosis when importing and exocytosis when secreting 
D)  diffusion when importing and exocytosis when secreting 
A)  exocytosis when importing and diffusion when secreting 
B)  exocytosis when importing and endocytosis when secreting 
C)  endocytosis when importing and exocytosis when secreting 
D)  diffusion when importing and exocytosis when secreting

Question 8

Match each mechanism of cellular transport with its correct definition.
-diffusion

Accepted Answer

A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins 
A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins

Question 9

In an aqueous environment, how are the phospholipids of a membrane arranged?

Accepted Answer

A)  in a single layer 
B)  in a bilayer, with the fatty acid tails located at the surface 
C)  in a bilayer, but the phospholipids have no specific orientation 
D)  in a bilayer, with the polar heads of each layer located at the surface 
A)  in a single layer 
B)  in a bilayer, with the fatty acid tails located at the surface 
C)  in a bilayer, but the phospholipids have no specific orientation 
D)  in a bilayer, with the polar heads of each layer located at the surface

Question 10

Which of the following is absolutely necessary for diffusion to occur?

Accepted Answer

A)  a phospholipid bilayer 
B)  a living cell 
C)  a selectively permeable membrane 
D)  a concentration gradient 
A)  a phospholipid bilayer 
B)  a living cell 
C)  a selectively permeable membrane 
D)  a concentration gradient

Question 11

An unknown cell contains cholesterol. What type of cell is it most likely to be?

Accepted Answer

A)  a bacterial cell 
B)  a fungal cell 
C)  a plant cell 
D)  an animal cell 
A)  a bacterial cell 
B)  a fungal cell 
C)  a plant cell 
D)  an animal cell

Question 12

Carrier proteins share several characteristics with enzymes used to catalyze metabolic reactions. In what ways are carrier proteins and enzymes similar?

Accepted Answer

Both carrier proteins and enzymes are sp

Question 13

When do cells undergo exocytosis?

Accepted Answer

A)  when secreting protein and wastes from the cell 
B)  when replicating 
C)  when ingesting nutrients 
D)  when pumping protons down a concentration gradient 
A)  when secreting protein and wastes from the cell 
B)  when replicating 
C)  when ingesting nutrients 
D)  when pumping protons down a concentration gradient

Question 14

Match each mechanism of cellular transport with its correct definition.
-receptor-mediated endocytosis

Accepted Answer

A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins 
A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins

Question 15

Match each mechanism of cellular transport with its correct definition.
-phagocytosis

Accepted Answer

A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins 
A) movement of a molecule from an area of high concentration to an area of lower concentration 
B) cells internalize molecules into a cell by the inward budding of vesicles possessing receptors specific to the molecule being transported 
C) movement of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane 
D) large particles are enveloped by the cell membrane and internalized 
E) a process in which liquid droplets are ingested by living cells
F)diffusion of molecules across the plasma membrane with the assistance of transport proteins

Question 16

A solution of 65% water, 35% solute is more concentrated with respect to solute than a solution of 70% water, 30% solute.

Accepted Answer

A) True 
 B)False

Question 17

How are simple diffusion and facilitated diffusion similar to each other?

Accepted Answer

A)  They both belong to passive transport. 
B)  They both transport through the aid of a transport molecule. 
C)  They both require energy. 
D)  They both belong to active transport. 
A)  They both belong to passive transport. 
B)  They both transport through the aid of a transport molecule. 
C)  They both require energy. 
D)  They both belong to active transport.

Question 18

Identify the structures indicated in this drawing of a typical plasma membrane.  
-integral proteins

Accepted Answer

The answer of Identify the structures indicated in this drawing...

Question 19

How are facilitated diffusion and active transport different from each other?

Accepted Answer

A)  Active transport requires a transport protein, while facilitated diffusion does not. 
B)  Facilitated diffusion requires a transport protein, while active transport does not. 
C)  Facilitated diffusion occurs against the gradient, while active transport does not. 
D)  Active transport occurs against the gradient, while facilitated diffusion does not. 
A)  Active transport requires a transport protein, while facilitated diffusion does not. 
B)  Facilitated diffusion requires a transport protein, while active transport does not. 
C)  Facilitated diffusion occurs against the gradient, while active transport does not. 
D)  Active transport occurs against the gradient, while facilitated diffusion does not.

Question 20

Which process leads to a net movement of uncharged molecules from a low concentration to a higher concentration?

Accepted Answer

A)  active transport 
B)  osmosis 
C)  facilitated diffusion 
D)  exocytosis 
A)  active transport 
B)  osmosis 
C)  facilitated diffusion 
D)  exocytosis

Exam 4: Cell Membranes and Signaling

What should the tonicity of the distilled water be compared to body cells?

Which environment is ideal for plant cells, and which is best for animal cells?

Suppose water moves across a membrane from an area of high water concentration to an area of low water concentration. What is this an example of?

Which molecules will pass most easily through a cell membrane by diffusion?

One component of the cell membrane functions as a selective barrier, and one component has specific functions such as transport, recognizing other cells, and binding to other cells. Which pair of terms refers to these two components, respectively?

What is responsible for the selective permeability of a cell membrane?

What two processes are involved when eukaryotic cells import and secrete large molecules?

Match each mechanism of cellular transport with its correct definition. -diffusion

In an aqueous environment, how are the phospholipids of a membrane arranged?

Which of the following is absolutely necessary for diffusion to occur?

An unknown cell contains cholesterol. What type of cell is it most likely to be?

Carrier proteins share several characteristics with enzymes used to catalyze metabolic reactions. In what ways are carrier proteins and enzymes similar?

When do cells undergo exocytosis?

Match each mechanism of cellular transport with its correct definition. -receptor-mediated endocytosis

Match each mechanism of cellular transport with its correct definition. -phagocytosis

A solution of 65% water, 35% solute is more concentrated with respect to solute than a solution of 70% water, 30% solute.

How are simple diffusion and facilitated diffusion similar to each other?

Identify the structures indicated in this drawing of a typical plasma membrane. -integral proteins

How are facilitated diffusion and active transport different from each other?

Which process leads to a net movement of uncharged molecules from a low concentration to a higher concentration?

Light and Life

The Cell: an Overview

Energy and Enzymes

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Gene Structure Expression, and Mutation

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

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