Question 1

In most mammals,the DNA found in mitochondria is inherited from

Accepted Answer

A)  the father only.
B)  the mother and father.
C)  either parent.
D)  the mother only.
E)  Mitochondria are not found in mammals.F) A) and B)
G) A) and D)

Question 2

What is the role of microfilaments in eukaryotic cells?

Accepted Answer

A)  component of the cytoskeleton
B)  provide strength during cell stretching and compression
C)  anchor cells to each other
D)  involved in muscle contractions with myosin protein
E)  All answers are correct.F) None of the above
G) A) and E)

Question 3

The three domains in the Woese system of classification are

Accepted Answer

A)  Bacteria,Animalia,and Plantae.
B)  Fungi,Protista,and Animalia.
C)  Archaea,Eukarya,and Protista.
D)  Monera,Bacteria,and Eukarya.
E)  Archaea,Bacteria,and Eukarya.F) B) and E)
G) C) and E)

Question 4

Flagella are not

Accepted Answer

A)  found on prokaryotic cells.
B)  found on human sperm.
C)  used for movement.
D)  found on eukaryotic cells.
E)  a component of the cytoskeleton.F) A) and B)
G) D) and E)

Question 5

The cell wall of bacteria

Accepted Answer

A)  helps prevent the cell from bursting.
B)  protects the cell.
C)  All answers are correct.
D)  contains peptidoglycan.
E)  gives the bacterium a distinctive shapE.F) C) and D)
G) B) and D)

Question 6

A junction that is a protein channel linking the cytoplasm of adjacent cells is called

Accepted Answer

A)  a tight junction.
B)  a gap junction.
C)  an adhering junction.
D)  an anchoring junction.
E)  a microtubular junction.F) A) and E)
G) B) and E) B

Question 7

When phospholipids are mixed with water their ____ are attracted to water and their ____ are repelled by water,forming a lipid bilayer.

Accepted Answer

A)  hydrophobic heads;hydrophilic tails
B)  hydrophobic tails;hydrophilic heads
C)  hydrophilic heads;hydrophobic tails
D)  hydrophilic tails;hydrophobic heads
E)  hydrophilic heads;hydrophilic tailsF) A) and B)
G) A) and C)

Question 8

What is the advantage of a mature red blood cell having a flattened shape rather than a spherical shape?

Accepted Answer

A)  Their surface area to volume will decrease,making it easier for them to fit through arteries and veins.
B)  Provides more membrane for the electron transport chains where oxygen is consumed.
C)  Provides more sites for the membrane-bound hemoglobin molecules which transport oxygen.
D)  Saves energy by making more membrane relative to the volume of the cell.
E)  Maximizes the relative surface area to exchange gasses.F) C) and D)
G) A) and D)

Question 9

In a human,the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut.What type of cell junction will prevent bacteria from moving between intestinal cells?

Accepted Answer

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

Question 10

The scientist (scientists) given credit for formulating the "cell theory" is (are)

Accepted Answer

A)  Robert Hooke.
B)  Carl Woese.
C)  J.Craig Venter.
D)  Mathias Schleiden and Theodore Schwann.
E)  Antony van Leeuwenhoek.F) A) and C)
G) B) and D)

Question 11

In muscle contractions ____ and myosin filaments slide across each other.

Accepted Answer

A)  tubulin
B)  actin
C)  intermediate filaments
D)  flagella
E)  ciliaF) C) and E)
G) A) and E)

Question 12

Penicillin halts bacterial infections

Accepted Answer

A)  by stimulating a person's immune system.
B)  by damaging the cell membrane.
C)  by interfering with the construction of the cell wall.
D)  by causing the DNA of a bacterium to mutate.
E)  All answers are correct.F) None of the above
G) C) and D)

Question 13

You are working on a forensics team and collect cells from a crime scene.The cells have a cell wall made of cellulose.This sample most likely came from

Accepted Answer

A)  an animal.
B)  a bacterium.
C)  a plant.
D)  a fungus.
E)  an archaean.F) B) and E)
G) A) and B) C

Question 14

What is the advantage of keeping the surface to volume ratio high in a cell?

Accepted Answer

A)  Maximizes the relative surface area to exchange nutrients,water,and waste.
B)  Maximizes the relative surface area for cooling.
C)  Provides more volume to store more organelles.
D)  Provides more volume to store more nutrients.
E)  Saves energy by making more membrane relative to the volume of the cell.F) A) and B)
G) A) and C)

Question 15

What type of membrane protein is involved in passing ions and polar molecules across membranes?

Accepted Answer

A)  transport proteins
B)  enzymes
C)  recognition proteins
D)  adhesion proteins
E)  receptor proteinsF) D) and E)
G) A) and D)

Question 16

Unlike most organelles,chloroplasts and mitochondria contain

Accepted Answer

A)  only one membrane.
B)  ribosomes,DNA,and double membranes.
C)  DNA and cilia.
D)  cilia and flagella.
E)  singles membranes and ribosomes.F) C) and E)
G) B) and D)

Question 17

The theory of endosymbiosis is based on

Accepted Answer

A)  the knowledge that ribosomes are structures found in bacteria,plants,and animals.
B)  the experiments in which bacteria were grown in plant cells and formed chloroplasts.
C)  the knowledge that chloroplasts and mitochondria resemble bacteria.
D)  evidence from the fossil recorD.
E)  similarities between chloroplasts and other organelles in animals.F) D) and E)
G) A) and B)

Question 18

A eukaryotic cell

Accepted Answer

A)  has a cell wall with peptidoglycan.
B)  is usually smaller than a prokaryotic cell.
C)  does not have membrane-bound organelles.
D)  has membrane-bound organelles.
E)  does not usually have a nucleus.F) A) and D)
G) A) and C)

Question 19

An organelle found in plant cells and some members of the kingdom Protista,but not in animal cells,is

Accepted Answer

A)  a centriole.
B)  a ribosome.
C)  a cell membrane.
D)  a lysosome.
E)  a chloroplast.F) B) and C)
G) A) and C) E

Question 20

All living cells have a cell wall.

Accepted Answer

A) True 
 B)False

Exam 3: Cells

In most mammals,the DNA found in mitochondria is inherited from

Correct AnswerverifiedShow Answer

What is the role of microfilaments in eukaryotic cells?

Correct AnswerverifiedShow Answer

The three domains in the Woese system of classification are

Correct AnswerverifiedShow Answer

Flagella are not

Correct AnswerverifiedShow Answer

The cell wall of bacteria

Correct AnswerverifiedShow Answer

A junction that is a protein channel linking the cytoplasm of adjacent cells is called

Correct AnswerverifiedB

When phospholipids are mixed with water their ____ are attracted to water and their ____ are repelled by water,forming a lipid bilayer.

Correct AnswerverifiedShow Answer

What is the advantage of a mature red blood cell having a flattened shape rather than a spherical shape?

Correct AnswerverifiedShow Answer

In a human,the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut.What type of cell junction will prevent bacteria from moving between intestinal cells?

Correct AnswerverifiedShow Answer

The scientist (scientists) given credit for formulating the "cell theory" is (are)

Correct AnswerverifiedShow Answer

In muscle contractions ____ and myosin filaments slide across each other.

Correct AnswerverifiedShow Answer

Penicillin halts bacterial infections

Correct AnswerverifiedShow Answer

You are working on a forensics team and collect cells from a crime scene.The cells have a cell wall made of cellulose.This sample most likely came from

Correct AnswerverifiedC

What is the advantage of keeping the surface to volume ratio high in a cell?

Correct AnswerverifiedShow Answer

What type of membrane protein is involved in passing ions and polar molecules across membranes?

Correct AnswerverifiedShow Answer

Unlike most organelles,chloroplasts and mitochondria contain

Correct AnswerverifiedShow Answer

The theory of endosymbiosis is based on

Correct AnswerverifiedShow Answer

A eukaryotic cell

Correct AnswerverifiedShow Answer

An organelle found in plant cells and some members of the kingdom Protista,but not in animal cells,is

Correct AnswerverifiedE

All living cells have a cell wall.

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B

When phospholipids are mixed with water their are attracted to water and their are repelled by water,forming a lipid bilayer.

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C

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E

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