Question 1

Which occurs during metaphase?

Accepted Answer

A)  Centrioles move to opposite poles 
B)  Chromosomes line up along the equator of the dividing cell 
C)  Chromosomes move to opposite poles 
D)  The nuclear envelope disappears 
A)  Centrioles move to opposite poles 
B)  Chromosomes line up along the equator of the dividing cell 
C)  Chromosomes move to opposite poles 
D)  The nuclear envelope disappears

Question 2

When water in a cell freezes slowly,sharp crystals spear through the membranes of the cell.The most likely explanation for the bad taste of meat that has "freezer burn" from repeated freeze/thaw cycles is the destruction of

Accepted Answer

A)  the Golgi bodies and their vesicles. 
B)  lysosomes and resultant autodigestion. 
C)  rough endoplasmic reticulum causing the release of ribosomes. 
D)  the nuclear membrane causing mixing of nucleoplasm and cytoplasm. 
A)  the Golgi bodies and their vesicles. 
B)  lysosomes and resultant autodigestion. 
C)  rough endoplasmic reticulum causing the release of ribosomes. 
D)  the nuclear membrane causing mixing of nucleoplasm and cytoplasm.

Question 3

The model of the plasma membrane that provides for the fluidity of materials embedded in its surface is the

Accepted Answer

The answer of The model of the plasma membrane that...

Question 4

Which of the following is NOT true about the Cell Theory?

Accepted Answer

A)  It states that all organisms are composed of cells 
B)  It states that all cells come from preexisting cells 
C)  It states that small organisms can arise spontaneously 
D)  It is accepted today by biologists as applying to virtually all forms of life 
A)  It states that all organisms are composed of cells 
B)  It states that all cells come from preexisting cells 
C)  It states that small organisms can arise spontaneously 
D)  It is accepted today by biologists as applying to virtually all forms of life

Question 5

Which is NOT a characteristic of mitochondria?

Accepted Answer

A)  A mitochondrion has two membranes 
B)  Mitochondria are the site of cellular respiration 
C)  Mitochondria contain their own genome 
D)  Mitochondria are replicated by nuclear chromosomes 
A)  A mitochondrion has two membranes 
B)  Mitochondria are the site of cellular respiration 
C)  Mitochondria contain their own genome 
D)  Mitochondria are replicated by nuclear chromosomes

Question 6

Biologists label various carbohydrates,fats and amino acids with radio-isotopes,place them in a cell culture,and allow time for cell metabolism.Then by disrupting cells in a blender and separating out various cell organelles,they find the radioactive molecules can be detected as part of various cellular compounds although visible cell structures appear unchanged.Therefore

Accepted Answer

A)  these "food" molecules are used only for energy. 
B)  most cell components are constantly being broken down and rebuilt. 
C)  molecules diffuse at random through the cytoplasm and into cell organelles. 
D)  radioactivity has an unusual role in metabolism of living cells. 
A)  these "food" molecules are used only for energy. 
B)  most cell components are constantly being broken down and rebuilt. 
C)  molecules diffuse at random through the cytoplasm and into cell organelles. 
D)  radioactivity has an unusual role in metabolism of living cells.

Question 7

Pinocytosis involves invaginated units called ________ that contain concentrations of specific binding receptors on their surface.

Accepted Answer

The answer of Pinocytosis involves invaginated units called ________ that...

Question 8

Cyclin-dependent kinases and cyclins are most closely associated with

Accepted Answer

A)  maintaining interphase. 
B)  regulating the cell cycle. 
C)  cytokinesis. 
D)  programmed cell death. 
A)  maintaining interphase. 
B)  regulating the cell cycle. 
C)  cytokinesis. 
D)  programmed cell death.

Question 9

The surface of some parasitic flatworms and some insect tissues is a "syncytium" or living layer that contains many nuclei and cell organelles but is not partitioned by plasma membranes.These tissues consume food,respire,and produce wastes.Since the cell theory states that "all living things are composed of cells" what is the best statement to accompany this question?

Accepted Answer

A)  These tissues are not living because they are not cellular 
B)  These tissues are obviously a bridge between nonliving and primitive living cells 
C)  The general concept of "life is cellular" still holds because these organisms still utilize cells sometime in their life, but this shows that plasma membrane partitions can be abandoned in some animals 
D)  This proves that a "vital force" beyond cell chemistry gives life to substances 
A)  These tissues are not living because they are not cellular 
B)  These tissues are obviously a bridge between nonliving and primitive living cells 
C)  The general concept of "life is cellular" still holds because these organisms still utilize cells sometime in their life, but this shows that plasma membrane partitions can be abandoned in some animals 
D)  This proves that a "vital force" beyond cell chemistry gives life to substances

Question 10

Which element is NOT correctly associated with its structures and function?

Accepted Answer

A)  Cilia have 9 pair of microtubules surrounding a central pair 
B)  Microtubules are made up of a protein called tubulin 
C)  Pseudopodia stream without the involvement of any microfilaments 
D)  Centrioles have a microtubule structure 
A)  Cilia have 9 pair of microtubules surrounding a central pair 
B)  Microtubules are made up of a protein called tubulin 
C)  Pseudopodia stream without the involvement of any microfilaments 
D)  Centrioles have a microtubule structure

Question 11

A paramecium is placed in a hypotonic solution.Which will occur?

Accepted Answer

A)  Salts will move into the paramecium from the surrounding solution 
B)  Water will move into the paramecium from the surrounding solution 
C)  Salts will move out of the paramecium into the surrounding solution 
D)  Water will move out of the paramecium into the surrounding solution 
A)  Salts will move into the paramecium from the surrounding solution 
B)  Water will move into the paramecium from the surrounding solution 
C)  Salts will move out of the paramecium into the surrounding solution 
D)  Water will move out of the paramecium into the surrounding solution

Question 12

Compare and contrast the various stages of mitosis and meiosis.Hypothesize which process arose first (explain your reasoning).

Accepted Answer

Mitosis and meiosis are both processes o

Question 13

Which is the best definition of active transport?

Accepted Answer

A)  Movement of molecules from higher concentration to lower concentration 
B)  Movement of water across a semi-permeable membrane from high water concentration to lower water concentration 
C)  Movement of molecules from lower concentration to higher concentration 
D)  Movement of a substance against its concentration through the release of energy from ATP 
A)  Movement of molecules from higher concentration to lower concentration 
B)  Movement of water across a semi-permeable membrane from high water concentration to lower water concentration 
C)  Movement of molecules from lower concentration to higher concentration 
D)  Movement of a substance against its concentration through the release of energy from ATP

Question 14

Apoptosis or programmed cell death is receiving much research attention because

Accepted Answer

A)  it is a normal part of embryonic development. 
B)  it is the cause of most animal diseases. 
C)  all "death" is bad and this is one of the few remaining causes of natural death to be overcome. 
D)  it is always caused by a fault in the cell cycle at G1 phase, G2 phase or S phase. 
A)  it is a normal part of embryonic development. 
B)  it is the cause of most animal diseases. 
C)  all "death" is bad and this is one of the few remaining causes of natural death to be overcome. 
D)  it is always caused by a fault in the cell cycle at G1 phase, G2 phase or S phase.

Question 15

Identify the various cell structures that have an endomembrane system; identify the function of each.What is unusual about eukaryotic organelles that have an endomembrane system?

Accepted Answer

The various cell structures that have an

Question 16

Which is true concerning the Golgi complex?

Accepted Answer

A)  It consists of a stack of membranous vesicles 
B)  Golgi complexes in animal cells have a forming face and a maturing face 
C)  Lysosomes are enzyme-filled vesicles that bud from the Golgi complex 
D)  All of the choices are correct 
A)  It consists of a stack of membranous vesicles 
B)  Golgi complexes in animal cells have a forming face and a maturing face 
C)  Lysosomes are enzyme-filled vesicles that bud from the Golgi complex 
D)  All of the choices are correct

Question 17

Technically,osmosis is

Accepted Answer

A)  movement of molecules from higher concentration to lower concentration. 
B)  movement of water across a semi-permeable membrane from high water concentration to lower water concentration. 
C)  movement of molecules from lower concentration to higher concentration. 
D)  movement of water across a semi-permeable membrane from low water concentration to higher water concentration. 
E)  movement of a substance against its concentration through the release of energy from ATP. 
A)  movement of molecules from higher concentration to lower concentration. 
B)  movement of water across a semi-permeable membrane from high water concentration to lower water concentration. 
C)  movement of molecules from lower concentration to higher concentration. 
D)  movement of water across a semi-permeable membrane from low water concentration to higher water concentration. 
E)  movement of a substance against its concentration through the release of energy from ATP.

Question 18

Which occurs during anaphase?

Accepted Answer

A)  Centrioles move to opposite poles 
B)  Chromosomes line up along the equator of the dividing cell 
C)  Chromatids move to opposite poles 
D)  The nuclear envelope disappears 
A)  Centrioles move to opposite poles 
B)  Chromosomes line up along the equator of the dividing cell 
C)  Chromatids move to opposite poles 
D)  The nuclear envelope disappears

Question 19

A high-powered microscope that produces a surface image from scattered secondary electrons is the

Accepted Answer

A)  brightfield light microscope. 
B)  transmission electron microscope (TEM). 
C)  scanning electron microscope (SEM). 
D)  confocal microscope. 
A)  brightfield light microscope. 
B)  transmission electron microscope (TEM). 
C)  scanning electron microscope (SEM). 
D)  confocal microscope.

Question 20

A multinucleate mass formed by the fusion of many cells rather than by nuclear proliferation is called a ____________.

Accepted Answer

The answer of A multinucleate mass formed by the fusion...

Exam 3: Cells As Units of Life

Which occurs during metaphase?

When water in a cell freezes slowly,sharp crystals spear through the membranes of the cell.The most likely explanation for the bad taste of meat that has "freezer burn" from repeated freeze/thaw cycles is the destruction of

The model of the plasma membrane that provides for the fluidity of materials embedded in its surface is the

Which of the following is NOT true about the Cell Theory?

Which is NOT a characteristic of mitochondria?

Pinocytosis involves invaginated units called ________ that contain concentrations of specific binding receptors on their surface.

Cyclin-dependent kinases and cyclins are most closely associated with

Which element is NOT correctly associated with its structures and function?

A paramecium is placed in a hypotonic solution.Which will occur?

Compare and contrast the various stages of mitosis and meiosis.Hypothesize which process arose first (explain your reasoning).

Which is the best definition of active transport?

Apoptosis or programmed cell death is receiving much research attention because

Identify the various cell structures that have an endomembrane system; identify the function of each.What is unusual about eukaryotic organelles that have an endomembrane system?

Which is true concerning the Golgi complex?

Technically,osmosis is

Which occurs during anaphase?

A high-powered microscope that produces a surface image from scattered secondary electrons is the

A multinucleate mass formed by the fusion of many cells rather than by nuclear proliferation is called a ____________.

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectural Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Radiate Animals

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Support, Protection, and Movement

Chaetognaths, Echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distributions

Animal Ecology

Filters