Question 1

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 2

Which type of cellular process will most likely be used by an amoeba in order to obtain food?

Accepted Answer

A) phagocytosis 
B) pinocytosis 
C) exocytosis 
D) receptor-mediated endocytosis 
A) phagocytosis 
B) pinocytosis 
C) exocytosis 
D) receptor-mediated endocytosis

Question 3

Active transport

Accepted Answer

A) requires an input of ATP. 
B) is involved in diffusion. 
C) occurs in osmosis and facilitated transport. 
D) All of the choices are correct. 
A) requires an input of ATP. 
B) is involved in diffusion. 
C) occurs in osmosis and facilitated transport. 
D) All of the choices are correct.

Question 4

Having similar ____________ would allow tissues and organs to be transplanted easily.

Accepted Answer

A) cell recognition proteins 
B) major histocompatibility complex proteins 
C) carbohydrate chains in the cell membrane 
D) all of the choices are involved in tissue transplantation 
A) cell recognition proteins 
B) major histocompatibility complex proteins 
C) carbohydrate chains in the cell membrane 
D) all of the choices are involved in tissue transplantation

Question 5

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 Incorrect 
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 Incorrect

Question 6

The process by which a white blood cell or an amoeba engulfs bacteria is called phagocytosis.

Accepted Answer

A) True 
 B)False

Question 7

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 8

All life forms currently have a basic cell membrane so we presume that the earliest forms of life had this "fence" isolating the internal organization from the external chaos.It is likely that the primordial environment was acidic.In such a case,the cell membrane would have to include

Accepted Answer

A) a sodium (Na+)pump. 
B) a proton (H+)pump. 
C) mitochondria underneath in order to provide energy for active transport. 
D) an acid-proof cell wall. 
E) a totally nonpermeable membrane. 
A) a sodium (Na+)pump. 
B) a proton (H+)pump. 
C) mitochondria underneath in order to provide energy for active transport. 
D) an acid-proof cell wall. 
E) a totally nonpermeable membrane.

Question 9

Which of the following is true with respect to plant cell walls?

Accepted Answer

A) They contain n-acetylglutamic acid. 
B) They all have secondary cell walls to some extent. 
C) There is a greater amount of cellulose in secondary cell walls than in primary cell walls. 
D) Lignin is found in primary cell walls of plants. 
A) They contain n-acetylglutamic acid. 
B) They all have secondary cell walls to some extent. 
C) There is a greater amount of cellulose in secondary cell walls than in primary cell walls. 
D) Lignin is found in primary cell walls of plants.

Question 10

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 11

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 12

What type of transport mechanism is required to move sodium ions against their concentration gradient?

Accepted Answer

A) active 
B) passive 
C) diffusion 
D) osmosis 
A) active 
B) passive 
C) diffusion 
D) osmosis

Question 13

Which of the following protein functions is not correctly associated with its correct integral protein?

Accepted Answer

A) carrier proteins-facilitate passage of molecules through the membrane 
B) enzymatic proteins-catalyze a specific reaction 
C) channel proteins-block the activity of carrier proteins 
D) cell recognition proteins-recognize pathogens 
A) carrier proteins-facilitate passage of molecules through the membrane 
B) enzymatic proteins-catalyze a specific reaction 
C) channel proteins-block the activity of carrier proteins 
D) cell recognition proteins-recognize pathogens

Question 14

A 10% glucose solution is placed in the thistle tube.The thistle tube is placed in a beaker that contains a 5% glucose solution.There is a differentially permeable membrane across the broad end of the tube,which is permeable to water but not to the sugar glucose.As diffusion occurs:

Accepted Answer

A) the 10% solution will become more concentrated and the 5% solution will become less concentrated. 
B) both solutions will become more concentrated. 
C) the 10% solution will become less concentrated and the 5% solution will become more concentrated. 
D) both solutions will become less concentrated. 
A) the 10% solution will become more concentrated and the 5% solution will become less concentrated. 
B) both solutions will become more concentrated. 
C) the 10% solution will become less concentrated and the 5% solution will become more concentrated. 
D) both solutions will become less concentrated.

Question 15

In the cell pictured,there is no net movement of water.The amount leaving the cell and entering the cell is the same.In what type of environment is this cell found?

Accepted Answer

A) hypertonic 
B) hypotonic 
C) isotonic 
D) none of the above 
A) hypertonic 
B) hypotonic 
C) isotonic 
D) none of the above

Question 16

A major chemical that regulates the fluidity of animal cell membranes by stiffening the membrane at higher temperatures and preventing the membrane from freezing at lower temperature is:

Accepted Answer

A) cholesterol. 
B) lipid in nature. 
C) a steroid. 
D) All of the choices are correct. 
A) cholesterol. 
B) lipid in nature. 
C) a steroid. 
D) All of the choices are correct.

Question 17

Sugars and amino acids are carried into the cell by means of

Accepted Answer

A) facilitated transport. 
B) diffusion. 
C) endocytosis. 
D) exocytosis. 
A) facilitated transport. 
B) diffusion. 
C) endocytosis. 
D) exocytosis.

Question 18

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 19

Freshwater protozoans react to a/an _____ environment by removing water through _____.

Accepted Answer

A) hypertonic,turgor pressure 
B) hypotonic,turgor pressure 
C) isotonic,a contractile vacuole 
D) hypertonic,a contractile vacuole 
E) hypotonic,a contractile vacuole 
A) hypertonic,turgor pressure 
B) hypotonic,turgor pressure 
C) isotonic,a contractile vacuole 
D) hypertonic,a contractile vacuole 
E) hypotonic,a contractile vacuole

Question 20

Some parasites and disease agents regularly change their identity before our immune system can build up substantial antibodies.How could cells change their chemical identity on a regular basis?

Accepted Answer

A) Rapid evolution produces mutations. 
B) A new phospholipid bilayer is generated to replace the old layer. 
C) Because the membrane is "set," the cell must reproduce and then the cell with the old membrane must die. 
D) Cells eliminate all surface proteins and present only a naked lipid bilayer. 
E) Different glycolipids and glycoproteins are produced internally and moved into the plasma membrane. 
A) Rapid evolution produces mutations. 
B) A new phospholipid bilayer is generated to replace the old layer. 
C) Because the membrane is "set," the cell must reproduce and then the cell with the old membrane must die. 
D) Cells eliminate all surface proteins and present only a naked lipid bilayer. 
E) Different glycolipids and glycoproteins are produced internally and moved into the plasma membrane.

Exam 5: Membrane Structure and Function

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

Which type of cellular process will most likely be used by an amoeba in order to obtain food?

Active transport

Having similar ____________ would allow tissues and organs to be transplanted easily.

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

The process by which a white blood cell or an amoeba engulfs bacteria is called phagocytosis.

Which of the following is NOT associated with animal cells?

All life forms currently have a basic cell membrane so we presume that the earliest forms of life had this "fence" isolating the internal organization from the external chaos.It is likely that the primordial environment was acidic.In such a case,the cell membrane would have to include

Which of the following is true with respect to plant cell walls?

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

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

What type of transport mechanism is required to move sodium ions against their concentration gradient?

Which of the following protein functions is not correctly associated with its correct integral protein?

A 10% glucose solution is placed in the thistle tube.The thistle tube is placed in a beaker that contains a 5% glucose solution.There is a differentially permeable membrane across the broad end of the tube,which is permeable to water but not to the sugar glucose.As diffusion occurs:

In the cell pictured,there is no net movement of water.The amount leaving the cell and entering the cell is the same.In what type of environment is this cell found?

A major chemical that regulates the fluidity of animal cell membranes by stiffening the membrane at higher temperatures and preventing the membrane from freezing at lower temperature is:

Sugars and amino acids are carried into the cell by means of

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

Freshwater protozoans react to a/an _____ environment by removing water through _____.

Some parasites and disease agents regularly change their identity before our immune system can build up substantial antibodies.How could cells change their chemical identity on a regular basis?

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: Structure and 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

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Freshwater protozoans react to a/an _ environment by removing water through _.