Question 1

Of the three domains of organisms,only the Bacteria are prokaryotes.

Accepted Answer

A) True 
 B)False

Question 2

The reason that mitochondrial DNA in most mammals is inherited from the mother only is because a sperm cell contains no mitochondria.

Accepted Answer

A) True 
 B)False

Question 3

The scientist(s)given credit for adding the third tenet (all cells come from preexisting cells)to the cell theory is (are)

Accepted Answer

A)  Mathias Schleiden and Theodore Schwann. 
B)  Rudolf Virchow. 
C)  Louis Pasteur. 
D)  Robert Hooke. 
E)  Antony van Leeuwenhoek. 
A)  Mathias Schleiden and Theodore Schwann. 
B)  Rudolf Virchow. 
C)  Louis Pasteur. 
D)  Robert Hooke. 
E)  Antony van Leeuwenhoek.

Question 4

In a human,the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut.Which of the following would prevent bacteria from moving between intestinal cells?

Accepted Answer

A)  plasmodesmata 
B)  cell wall 
C)  anchoring junction 
D)  gap junction 
E)  tight junction 
A)  plasmodesmata 
B)  cell wall 
C)  anchoring junction 
D)  gap junction 
E)  tight junction

Question 5

How do vesicles carrying proteins destined for secretion move to the plasma membrane?

Accepted Answer

A)  along actin 
B)  They swim with flagella. 
C)  along microtubules 
D)  by diffusion 
E)  They swim with cilia. 
A)  along actin 
B)  They swim with flagella. 
C)  along microtubules 
D)  by diffusion 
E)  They swim with cilia.

Question 6

Liver cells help clean your blood with a wide range of digestive enzymes that hydrolyze toxic molecules.The liver cells would have ____,which are organelles specialized to do this.

Accepted Answer

A)  golgi apparatus 
B)  vesicle 
C)  peroxisomes 
D)  lysosomes 
A)  golgi apparatus 
B)  vesicle 
C)  peroxisomes 
D)  lysosomes

Question 7

What is the role of tubulin during mitosis in eukaryotic cells?

Accepted Answer

A)  It is necessary for the cell to grow. 
B)  It pulls a cell's chromosomes apart during cell division. 
C)  It is necessary for the DNA to replicate. 
D)  It maintains cell shape with an internal scaffold structure. 
E)  It is used to bind some adjacent cells together in animal cell junctions. 
A)  It is necessary for the cell to grow. 
B)  It pulls a cell's chromosomes apart during cell division. 
C)  It is necessary for the DNA to replicate. 
D)  It maintains cell shape with an internal scaffold structure. 
E)  It is used to bind some adjacent cells together in animal cell junctions.

Question 8

A central vacuole of a mature plant cell

Accepted Answer

A)  stores genetic information. 
B)  produces energy from nutrients. 
C)  produces protein. 
D)  produces turgor pressure. 
E)  produces mRNA. 
A)  stores genetic information. 
B)  produces energy from nutrients. 
C)  produces protein. 
D)  produces turgor pressure. 
E)  produces mRNA.

Question 9

Members of Archaea are often referred to as extremophiles because many live in conditions of extreme

Accepted Answer

A)  acidity. 
B)  All of the answer choices are correct. 
C)  temperature. 
D)  salinity. 
E)  heat. 
A)  acidity. 
B)  All of the answer choices are correct. 
C)  temperature. 
D)  salinity. 
E)  heat.

Question 10

The theory of endosymbiosis is based on

Accepted Answer

A)  the observations that chloroplasts and mitochondria resemble bacteria. 
B)  the experiments in which bacteria were made to grow in plant cells forming chloroplasts. 
C)  similarities between chloroplasts and other organelles in animals. 
D)  evidence from the fossil record. 
E)  the knowledge that ribosomes are structures found in bacteria, plants, and animals. 
A)  the observations that chloroplasts and mitochondria resemble bacteria. 
B)  the experiments in which bacteria were made to grow in plant cells forming chloroplasts. 
C)  similarities between chloroplasts and other organelles in animals. 
D)  evidence from the fossil record. 
E)  the knowledge that ribosomes are structures found in bacteria, plants, and animals.

Question 11

Plant growth and flowering are strongly controlled by root and stem signal chemicals.Which of the following cell connection transports these molecules between adjacent cells?

Accepted Answer

A)  gap junction 
B)  cell wall 
C)  plasmodesmata 
D)  anchoring junction 
E)  tight junction 
A)  gap junction 
B)  cell wall 
C)  plasmodesmata 
D)  anchoring junction 
E)  tight junction

Question 12

In most mammals the DNA found in mitochondria is inherited from

Accepted Answer

A)  the mother and father. 
B)  the father only. 
C)  neither parent. 
D)  the mother only. 
A)  the mother and father. 
B)  the father only. 
C)  neither parent. 
D)  the mother only.

Question 13

Herceptin medication used for treating breast cancers,and Gleevec medication used for leukemia demonstrate that

Accepted Answer

A)  'chemotherapy' of breast cancer and others is directed towards quickly killing all cells in the affected tissue. 
B)  the cell membrane is the common cell component that fails in all cancers. 
C)  specific molecules contribute to the structure and function of cells. 
D)  medical research has now given us strong prevention of these two cancers. 
A)  'chemotherapy' of breast cancer and others is directed towards quickly killing all cells in the affected tissue. 
B)  the cell membrane is the common cell component that fails in all cancers. 
C)  specific molecules contribute to the structure and function of cells. 
D)  medical research has now given us strong prevention of these two cancers.

Question 14

A cytoskeleton is

Accepted Answer

A)  a system of tracks used for intracellular transport. 
B)  composed of microtubules, microfilaments, and intermediate filaments. 
C)  a structure that aids in the process of cell division. 
D)  All of the answer choices are correct. 
E)  found in the cytoplasm of eukaryotic cells. 
A)  a system of tracks used for intracellular transport. 
B)  composed of microtubules, microfilaments, and intermediate filaments. 
C)  a structure that aids in the process of cell division. 
D)  All of the answer choices are correct. 
E)  found in the cytoplasm of eukaryotic cells.

Question 15

In muscle contraction,____ and myosin filaments slide across each other.

Accepted Answer

A)  flagella 
B)  actin 
C)  tubulin 
D)  cilia 
E)  intermediate filaments 
A)  flagella 
B)  actin 
C)  tubulin 
D)  cilia 
E)  intermediate filaments

Question 16

You discover a new life-form,and study it under an electron microscope.You find that its cells have no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life-form is in which domain?

Accepted Answer

A)  Bacteria 
B)  Archaea 
C)  Eukarya 
D)  Protista 
E)  Animalia 
A)  Bacteria 
B)  Archaea 
C)  Eukarya 
D)  Protista 
E)  Animalia

Question 17

A cell membrane is not

Accepted Answer

A)  a rigid structure. 
B)  a bilayered structure. 
C)  composed of phospholipid molecules. 
D)  a fluid structure. 
E)  a mosaic structure. 
A)  a rigid structure. 
B)  a bilayered structure. 
C)  composed of phospholipid molecules. 
D)  a fluid structure. 
E)  a mosaic structure.

Question 18

The scientist(s)given credit for first using the term "cell" to describe the basic unit of life is (are)

Accepted Answer

A)  Louis Pasteur. 
B)  Robert Hooke. 
C)  Mathias Schleiden and Theodore Schwann. 
D)  Antony van Leeuwenhoek. 
E)  Rudolf Virchow. 
A)  Louis Pasteur. 
B)  Robert Hooke. 
C)  Mathias Schleiden and Theodore Schwann. 
D)  Antony van Leeuwenhoek. 
E)  Rudolf Virchow.

Question 19

With electron microscopes,researchers have found a group of bacteria to have folded membranes resembling thylakoids.The membranes contain molecules similar to those in plant chloroplasts,allowing photosynthesis to take place.A likely explanation for the similarity of the membrane in bacterial cells is that

Accepted Answer

A)  these bacteria share similar genetic controls, regulating the formation of the folded membranes, with plants. 
B)  these bacteria share structure and molecules, but could not be expected to do photosynthesis without specialized compartments. 
C)  these bacteria should be reclassified as eukaryotes, since they share the thylakoid membrane and molecules with plants and protists. 
D)  these bacteria fully evolved to have membrane-bound organelles, like the eukaryotes. 
A)  these bacteria share similar genetic controls, regulating the formation of the folded membranes, with plants. 
B)  these bacteria share structure and molecules, but could not be expected to do photosynthesis without specialized compartments. 
C)  these bacteria should be reclassified as eukaryotes, since they share the thylakoid membrane and molecules with plants and protists. 
D)  these bacteria fully evolved to have membrane-bound organelles, like the eukaryotes.

Question 20

Determine which of these cells has the largest problems due to surface area limitations.

Accepted Answer

A)  A normal 
B)  An amoeba cell in a lake may be 0.50 millimeters, variable in shape with many long, narrow extensions of the cell. 
C)  A human egg cell is often 0.13 millimeters, and is spherical in shape. 
D)  An epithelial cell lining any mammal arteries may be 0.03 millimeters, and has a very flat shape. 
E)  coli fecal cell in the digestive tract of animals may be 0.003 millimeters, in a rounded rod or cylinder shape. 
A)  A normal 
B)  An amoeba cell in a lake may be 0.50 millimeters, variable in shape with many long, narrow extensions of the cell. 
C)  A human egg cell is often 0.13 millimeters, and is spherical in shape. 
D)  An epithelial cell lining any mammal arteries may be 0.03 millimeters, and has a very flat shape. 
E)  coli fecal cell in the digestive tract of animals may be 0.003 millimeters, in a rounded rod or cylinder shape.

Exam 3: Cell Structure and Function

Of the three domains of organisms,only the Bacteria are prokaryotes.

The reason that mitochondrial DNA in most mammals is inherited from the mother only is because a sperm cell contains no mitochondria.

The scientist(s)given credit for adding the third tenet (all cells come from preexisting cells)to the cell theory is (are)

In a human,the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut.Which of the following would prevent bacteria from moving between intestinal cells?

How do vesicles carrying proteins destined for secretion move to the plasma membrane?

Liver cells help clean your blood with a wide range of digestive enzymes that hydrolyze toxic molecules.The liver cells would have ____,which are organelles specialized to do this.

What is the role of tubulin during mitosis in eukaryotic cells?

A central vacuole of a mature plant cell

Members of Archaea are often referred to as extremophiles because many live in conditions of extreme

The theory of endosymbiosis is based on

Plant growth and flowering are strongly controlled by root and stem signal chemicals.Which of the following cell connection transports these molecules between adjacent cells?

In most mammals the DNA found in mitochondria is inherited from

Herceptin medication used for treating breast cancers,and Gleevec medication used for leukemia demonstrate that

A cytoskeleton is

In muscle contraction,____ and myosin filaments slide across each other.

You discover a new life-form,and study it under an electron microscope.You find that its cells have no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life-form is in which domain?

A cell membrane is not

The scientist(s)given credit for first using the term "cell" to describe the basic unit of life is (are)

Determine which of these cells has the largest problems due to surface area limitations.

The Scientific Study of Life

The Chemistry of Life

The Energy of Life

Photosynthesis

How Cells Release Energy

DNA Structure and Gene Function

DNA Replication, mitosis, and the Cell Cycle

Sexual Reproduction and Meiosis

Patterns of Inheritance

DNA Technology

The Forces of Evolutionary Change

Evidence of Evolution

Speciation and Extinction

The Origin and History of Life

Viruses

Bacteria and Archaea

Protists

Plants

Fungi

Animals

Plant Form and Function

Plant Nutrition and Transport

Reproduction and Development of Flowering Plants

Animal Tissues and Organ Systems

The Nervous System

The Senses

The Endocrine System

The Skeletal and Muscular Systems

The Circulatory System

The Respiratory System

Digestion and Nutrition

Regulation of Temperature and Body Fluids

The Immune System

Animal Reproduction and Development

Animal Behavior

Population Ecology

Communities and Ecosystems

Biomes

Preserving Biodiversity

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