Question 1

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 chromosomesE) A) and C)
F) A) and B)

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.E) All of the above
F) B) and C)

Question 3

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 4

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 5

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.F) A) and B)
G) C) and E)

Question 6

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 7

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 8

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 lifeE) B) and D)
F) B) and C)

Question 9

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.E) A) and B)
F) A) and D)

Question 10

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 ATPE) B) and C)
F) A) and D)

Question 11

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 disappearsE) None of the above
F) B) and D)

Question 12

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.E) A) and C)
F) All of the above

Question 13

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.E) A) and B)
F) All of the above

Question 14

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 solutionE) B) and D)
F) A) and B)

Question 15

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...

Question 16

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.E) B) and C)
F) A) and D)

Question 17

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 structureE) A) and B)
F) A) and C)

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 disappearsE) B) and D)
F) A) and B)

Question 19

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 correctE) A) and D)
F) C) and D)

Question 20

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 substancesE) B) and C)
F) B) and D)

Exam 3: Cells As Units of Life

Which is the best definition of active transport?

Correct Answer
verified

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?

Correct Answer
Answered by ExamLex AI
The various cell structures that have an...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

Apoptosis or programmed cell death is receiving much research attention because

Correct Answer
verified

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

Correct Answer
Answered by ExamLex AI
Mitosis and meiosis are both processes o...
View Answer

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

Correct Answer
verified

Which occurs during metaphase?

Correct Answer
verified

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

Correct Answer
verified

Which is NOT a characteristic of mitochondria?

Correct Answer
verified

Cyclin-dependent kinases and cyclins are most closely associated with

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Which occurs during anaphase?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Technically,osmosis is

Correct Answer
verified

Correct Answer
verified

Which is true concerning the Golgi complex?

Correct Answer
verified

Exam 3: Cells As Units of Life

Which is the best definition of active transport?

Correct AnswerverifiedShow Answer

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?

Correct AnswerAnswered by ExamLex AIThe various cell structures that have an...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Apoptosis or programmed cell death is receiving much research attention because

Correct AnswerverifiedShow Answer

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

Correct AnswerAnswered by ExamLex AIMitosis and meiosis are both processes o...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which occurs during metaphase?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is NOT a characteristic of mitochondria?

Correct AnswerverifiedShow Answer

Cyclin-dependent kinases and cyclins are most closely associated with

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which occurs during anaphase?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Technically,osmosis is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is true concerning the Golgi complex?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The various cell structures that have an...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Mitosis and meiosis are both processes o...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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