Question 1

The function of the nuclear pores is to

Accepted Answer

A)  synthesize and repair DNA,the unit of genetic information. 
B)  assemble ribosomes from raw materials that are synthesized in the nucleus. 
C)  communicate with components of the endomembrane system. 
D)  regulate movement of materials across the nuclear membrane. 
E)  support the nuclear envelope. 
A)  synthesize and repair DNA,the unit of genetic information. 
B)  assemble ribosomes from raw materials that are synthesized in the nucleus. 
C)  communicate with components of the endomembrane system. 
D)  regulate movement of materials across the nuclear membrane. 
E)  support the nuclear envelope.

Question 2

Structures that contain networks of intermediate filaments and provide mechanical stability to animal tissues are called

Accepted Answer

A)  extracellular matrices. 
B)  glycoproteins. 
C)  gap junctions. 
D)  desmosomes. 
E)  phospholipid bilayers. 
A)  extracellular matrices. 
B)  glycoproteins. 
C)  gap junctions. 
D)  desmosomes. 
E)  phospholipid bilayers.

Question 3

Which organelle is generated by the cell membrane and contains macromolecules?

Accepted Answer

A)  Glyoxysome 
B)  Lysosome 
C)  Peroxisome 
D)  Phagosome 
E)  Ribosome 
A)  Glyoxysome 
B)  Lysosome 
C)  Peroxisome 
D)  Phagosome 
E)  Ribosome

Question 4

After a protein is made,what is one of the ways in which it can get to a specific location in a cell?

Accepted Answer

A)  A carbohydrate group is added in the RER that tags the protein for a specific location. 
B)  The general flow of vesicles within the cell carries proteins to their proper location. 
C)  The nucleus adds a posttranscriptional tag to the protein that acts as an address. 
D)  The motor protein actin binds specific proteins and transports them to their target destinations. 
E)  Ribosomes package proteins into vesicles tagged with specific glycoproteins. 
A)  A carbohydrate group is added in the RER that tags the protein for a specific location. 
B)  The general flow of vesicles within the cell carries proteins to their proper location. 
C)  The nucleus adds a posttranscriptional tag to the protein that acts as an address. 
D)  The motor protein actin binds specific proteins and transports them to their target destinations. 
E)  Ribosomes package proteins into vesicles tagged with specific glycoproteins.

Question 5

A student has built a model of a plant cell for a science fair.It consists of a balloon filled with water that is placed within a plastic bag that also contains water,and this bag is held within a plastic box.In this model,the balloon most likely represents a _______,the plastic bag represents the _______,and the plastic box represents the _______.

Accepted Answer

A)  chromosome;nucleus;cell membrane 
B)  vacuole;cell membrane;cell wall 
C)  chloroplast;nucleus;cell membrane 
D)  thylakoid;chloroplast;cell wall 
E)  nucleus;cytoplasm;cell membrane 
A)  chromosome;nucleus;cell membrane 
B)  vacuole;cell membrane;cell wall 
C)  chloroplast;nucleus;cell membrane 
D)  thylakoid;chloroplast;cell wall 
E)  nucleus;cytoplasm;cell membrane

Question 6

The figure below shows a cell that could have been taken from a _______;the structures labeled 1,2 and 3,are _______,_______ and _______,in that order.

Accepted Answer

A)  potato;leucoplasts;microfilaments;plasmodesmata 
B)  bacterium;endoplasmic reticulum;flagella;peptidoglycan 
C)  human lung;gap junction;desmosome;tight junction 
D)  tree leaf;endoplasmic reticulum;desmosome;plasmodesmata 
E)  human epithelium;tight junction;desmosome;gap junction 
A)  potato;leucoplasts;microfilaments;plasmodesmata 
B)  bacterium;endoplasmic reticulum;flagella;peptidoglycan 
C)  human lung;gap junction;desmosome;tight junction 
D)  tree leaf;endoplasmic reticulum;desmosome;plasmodesmata 
E)  human epithelium;tight junction;desmosome;gap junction

Question 7

If a physician took a biopsy of one of your lymph nodes and wanted to see quickly if the cells in their living state looked normal,she could observe the cells using

Accepted Answer

A)  an electron microscope but not a light microscope. 
B)  an electron microscope or a light microscope. 
C)  a light microscope. 
D)  a light microscope or her naked eye. 
E)  her naked eye. 
A)  an electron microscope but not a light microscope. 
B)  an electron microscope or a light microscope. 
C)  a light microscope. 
D)  a light microscope or her naked eye. 
E)  her naked eye.

Question 8

Use the following to answer questions :
Refer to the figure below.  
-If you were able to attach a molecular tag to actin monomers,and then visualize where that tag ended up in the cell,you would most likely to able to see tagged actin in which of the structures shown in the figure above?

Accepted Answer

A)  1 and 2 only 
B)  2 only 
C)  2 and 3 only 
D)  1,2,and 3 
E)  4 
A)  1 and 2 only 
B)  2 only 
C)  2 and 3 only 
D)  1,2,and 3 
E)  4

Question 9

A major distinction between prokaryotic and eukaryotic cells is that

Accepted Answer

A)  prokaryotic cells do not have a nucleus,whereas eukaryotic cells do. 
B)  prokaryotic cells do not have DNA,whereas eukaryotic cells do. 
C)  prokaryotic cells are larger than eukaryotic cells. 
D)  prokaryotic cells have not prospered,whereas eukaryotic cells are evolutionary "successes." 
E)  prokaryotic cells cannot obtain energy from their environment,whereas eukaryotic cells can. 
A)  prokaryotic cells do not have a nucleus,whereas eukaryotic cells do. 
B)  prokaryotic cells do not have DNA,whereas eukaryotic cells do. 
C)  prokaryotic cells are larger than eukaryotic cells. 
D)  prokaryotic cells have not prospered,whereas eukaryotic cells are evolutionary "successes." 
E)  prokaryotic cells cannot obtain energy from their environment,whereas eukaryotic cells can.

Question 10

Suppose that a 1-mm cube is manipulated to become a 3-mm cube.Which statement about the surface area-to-volume ratio is correct?

Accepted Answer

A)  The 3-mm cube has a higher ratio than the 1-mm cube had. 
B)  The ratio decreased as the cube became smaller. 
C)  The increase in the cube's volume tripled the ratio. 
D)  The ratio decreased as the cube became larger. 
E)  The ratio did not change. 
A)  The 3-mm cube has a higher ratio than the 1-mm cube had. 
B)  The ratio decreased as the cube became smaller. 
C)  The increase in the cube's volume tripled the ratio. 
D)  The ratio decreased as the cube became larger. 
E)  The ratio did not change.

Question 11

Lysosomes are important to eukaryotic cells because they contain

Accepted Answer

A)  photosynthetic pigments. 
B)  starch molecules for energy storage. 
C)  their own DNA molecules. 
D)  all the cells' waste materials. 
E)  digestive enzymes. 
A)  photosynthetic pigments. 
B)  starch molecules for energy storage. 
C)  their own DNA molecules. 
D)  all the cells' waste materials. 
E)  digestive enzymes.

Question 12

The figure below is an electron micrograph of _______.The picture could have been taken of cellular material from _______.

Accepted Answer

A)  chloroplasts;a plant but not an animal 
B)  ribosomes;an animal but not a plant 
C)  mitochondria;a plant or animal 
D)  ribosomes;a plant or animal 
E)  the Golgi apparatus;a plant or animal 
A)  chloroplasts;a plant but not an animal 
B)  ribosomes;an animal but not a plant 
C)  mitochondria;a plant or animal 
D)  ribosomes;a plant or animal 
E)  the Golgi apparatus;a plant or animal

Question 13

The genetic material of prokaryotic cells is found in the

Accepted Answer

A)  cell membrane. 
B)  nucleus. 
C)  ribosome. 
D)  nucleoid. 
E)  mitochondria. 
A)  cell membrane. 
B)  nucleus. 
C)  ribosome. 
D)  nucleoid. 
E)  mitochondria.

Question 14

Archaea and Bacteria do not have membrane-enclosed internal compartments called organelles;therefore,they are known as _______.

Accepted Answer

The answer of Archaea and Bacteria do not have membrane-enclosed...

Question 15

Microfilaments can be involved in contractions that change the shape of a cell when they are

Accepted Answer

A)  working with microtubules to bend cilia and flagella. 
B)  associated with motor proteins such as myosin. 
C)  complexed with intermediate filaments to form desmosomes. 
D)  being assembled from actin monomers. 
E)  associated with actin-associated proteins that are adding actin monomers to the "plus end" of the filament. 
A)  working with microtubules to bend cilia and flagella. 
B)  associated with motor proteins such as myosin. 
C)  complexed with intermediate filaments to form desmosomes. 
D)  being assembled from actin monomers. 
E)  associated with actin-associated proteins that are adding actin monomers to the "plus end" of the filament.

Question 16

If you had a problem with your heart whereby signals were not being conducted adequately through the heart muscle,which structures would likely be a cause for this malfunction?

Accepted Answer

A)  Myosin motor proteins 
B)  Desmosomes 
C)  Gap junctions 
D)  Actin microfilaments 
E)  Kinesins 
A)  Myosin motor proteins 
B)  Desmosomes 
C)  Gap junctions 
D)  Actin microfilaments 
E)  Kinesins

Question 17

You would not expect to find RNA in which structure?

Accepted Answer

A)  Nucleus 
B)  Mitochondrion 
C)  Vacuole 
D)  Ribosome 
E)  Prokaryotic cell 
A)  Nucleus 
B)  Mitochondrion 
C)  Vacuole 
D)  Ribosome 
E)  Prokaryotic cell

Question 18

Plants are able to distribute hormones and nutrients to neighboring cells through _______;in animal tissues _______ has/have a similar function.

Accepted Answer

A)  cellulose;collagen 
B)  plasmodesmata;desmosomes 
C)  cell membrane-lined channels extending through the cell wall;gap junctions 
D)  endoplasmic reticulum;blood vessels 
E)  extracellular matrix;proteoglycans 
A)  cellulose;collagen 
B)  plasmodesmata;desmosomes 
C)  cell membrane-lined channels extending through the cell wall;gap junctions 
D)  endoplasmic reticulum;blood vessels 
E)  extracellular matrix;proteoglycans

Question 19

You watch an amoeba in culture moving along the bottom of the dish,constantly changing its shape.This change in shape is due primarily to changes in the _______ of the amoeba.

Accepted Answer

A)  cell membrane 
B)  cytoskeleton 
C)  nucleus 
D)  cytosol 
E)  endoplasmic reticulum 
A)  cell membrane 
B)  cytoskeleton 
C)  nucleus 
D)  cytosol 
E)  endoplasmic reticulum

Question 20

Autophagy is the controlled destruction of cell components.This process takes place in lysosomes because

Accepted Answer

A)  it allows for controlled destruction without destroying all cell components. 
B)  lysosomes are the only organelles containing enzymes. 
C)  it ensures that cells undergo programmed cell death following autophagy. 
D)  cells would otherwise not have enough energy to function. 
E)  organelles can then be rebuilt from their component macromolecules. 
A)  it allows for controlled destruction without destroying all cell components. 
B)  lysosomes are the only organelles containing enzymes. 
C)  it ensures that cells undergo programmed cell death following autophagy. 
D)  cells would otherwise not have enough energy to function. 
E)  organelles can then be rebuilt from their component macromolecules.

Exam 4: Cells: the Working Units of Life

The function of the nuclear pores is to

Structures that contain networks of intermediate filaments and provide mechanical stability to animal tissues are called

Which organelle is generated by the cell membrane and contains macromolecules?

After a protein is made,what is one of the ways in which it can get to a specific location in a cell?

The figure below shows a cell that could have been taken from a _______;the structures labeled 1,2 and 3,are _______,_______ and _______,in that order.

If a physician took a biopsy of one of your lymph nodes and wanted to see quickly if the cells in their living state looked normal,she could observe the cells using

Use the following to answer questions : Refer to the figure below. -If you were able to attach a molecular tag to actin monomers,and then visualize where that tag ended up in the cell,you would most likely to able to see tagged actin in which of the structures shown in the figure above?

A major distinction between prokaryotic and eukaryotic cells is that

Suppose that a 1-mm cube is manipulated to become a 3-mm cube.Which statement about the surface area-to-volume ratio is correct?

Lysosomes are important to eukaryotic cells because they contain

The figure below is an electron micrograph of _______.The picture could have been taken of cellular material from _______.

The genetic material of prokaryotic cells is found in the

Archaea and Bacteria do not have membrane-enclosed internal compartments called organelles;therefore,they are known as _______.

Microfilaments can be involved in contractions that change the shape of a cell when they are

If you had a problem with your heart whereby signals were not being conducted adequately through the heart muscle,which structures would likely be a cause for this malfunction?

You would not expect to find RNA in which structure?

Plants are able to distribute hormones and nutrients to neighboring cells through _______;in animal tissues _______ has/have a similar function.

You watch an amoeba in culture moving along the bottom of the dish,constantly changing its shape.This change in shape is due primarily to changes in the _______ of the amoeba.

Autophagy is the controlled destruction of cell components.This process takes place in lysosomes because

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

The figure below shows a cell that could have been taken from a ___;the structures labeled 1,2 and 3,are _,_ and ___,in that order.

The figure below is an electron micrograph of _.The picture could have been taken of cellular material from _.

Plants are able to distribute hormones and nutrients to neighboring cells through _;in animal tissues _ has/have a similar function.