Question 1

Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?

Accepted Answer

A)  aid in digestion
B)  decomposers
C)  producers
D)  pharmaceutical production
E)  cause mitochondrial diseasesF) A) and B)
G) A) and E)

Question 2

What type of microscope would you use if you wanted to examine the ridges on the outside of a larval mollusk shell?

Accepted Answer

A)  light microscope
B)  transmission electron microscope
C)  scanning electron microscope
D)  transmission or scanning electron microscopes
E)  light microscope or transmission electron microscopeF) None of the above
G) All of the above

Question 3

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

Accepted Answer

A)  Robert Hooke.
B)  Mathias Schleiden and Theodore Schwann.
C)  Rudolf Virchow.
D)  Carl Woese.
E)  J.Craig Venter.F) All of the above
G) A) and E)

Question 4

Most living cells are small in size because they need a small ratio of surface area to volume.

Accepted Answer

A) True 
 B)False

Question 5

Mitochondrial DNA in most mammals is inherited only from the mother because a sperm cell contains no mitochondria.

Accepted Answer

A) True 
 B)False

Question 6

The primary structural component of a cell membrane is

Accepted Answer

A)  a cholesterol molecule.
B)  a protein molecule.
C)  a phospholipid molecule.
D)  an enzyme.
E)  a sugar molecule attached to a protein.F) A) and B)
G) A) and C)

Question 7

Which are recycling centers for the cell?

Accepted Answer

A)  ribosomes and Golgi apparatus.
B)  endoplasmic reticulum and chloroplasts.
C)  mitochondria and nucleus.
D)  central vacuole and lysosomes.
E)  All answers are correct.F) A) and C)
G) A) and B)

Question 8

Eukaryotic cells are 10-100 times the size of prokaryotic cells.How do eukaryotic cells resolve the surface area to volume limitations that favor smaller cells?

Accepted Answer

A)  They have pumps that move gasses and nutrients through the cell.
B)  Movement of materials is prevented in cells without a cell wall.
C)  Organelles keep reactions compartmentalized and concentrated.
D)  Gasses are taken up by active transport.
E)  None of the biochemical reactions in prokaryotes occur in eukaryotes.F) A) and E)
G) All of the above

Question 9

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",what is the role of cytoskeleton proteins in prokaryotic cells?

Accepted Answer

A)  cell movement
B)  cell shape
C)  movement of materials within the cell
D)  component of the nuclear envelope
E)  component of mitochondriaF) A) and E)
G) B) and C)

Question 10

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the surface area increase?

Accepted Answer

A)  2-fold
B)  4-fold
C)  It would stay the same.
D)  9-fold
E)  8-foldF) A) and D)
G) None of the above

Question 11

What type of membrane protein is involved in creating anchoring junctions between animal cells?

Accepted Answer

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

Question 12

The original three tenets of the cell theory are that

Accepted Answer

A)  all organisms have DNA,DNA is the fundamental unit of life,and all cells come from preexisting cells.
B)  all organisms are made of one or more cells,the cell is the fundamental unit of life,and all cells come from preexisting cells.
C)  all organisms have DNA,all organisms are made of cells,and all cells produce proteins.
D)  all organisms are made of one or more cells,the cell is the fundamental unit of life,and all cells have a nucleus.
E)  all organisms are made of one or more cells,all cells contain DNA,and all cells come from preexisting cells.F) B) and E)
G) C) and E)

Question 13

Cilia are not

Accepted Answer

A)  found in the nucleus.
B)  found on eukaryotic cells.
C)  used for movement.
D)  short appendages.
E)  found on the exterior of cells.F) A) and B)
G) A) and E)

Question 14

A central vacuole

Accepted Answer

A)  produces protein.
B)  degrades molecules and organelles and maintains water pressure.
C)  produces mRNA.
D)  stores genetic information.
E)  produces energy from food.F) A) and E)
G) A) and D)

Question 15

The function of the nucleolus is

Accepted Answer

A)  protein synthesis.
B)  photosynthesis.
C)  transport of material into and out of the nucleus.
D)  assembly of components of ribosomes.
E)  assembly of DNA.F) B) and E)
G) A) and B)

Question 16

How do cells avoid surface area limitations?

Accepted Answer

A)  all of the choices
B)  flattened shape
C)  long and thin shape
D)  transportation system that circulates materials inside the cell
E)  many microscopic extensionsF) A) and B)
G) None of the above

Question 17

Which of the following are cellular digestion centers?

Accepted Answer

A)  peroxisomes and ribosomes
B)  lysosomes and peroxisomes
C)  ribosomes and chloroplasts
D)  chloroplasts and ribosomes
E)  lysosomes and Golgi apparatusF) D) and E)
G) C) and E)

Question 18

The cytoskeleton consists of microtubules,microfilaments,and intermediate filaments.

Accepted Answer

A) True 
 B)False

Question 19

Endosymbiosis is a theory based on the resemblance of chloroplasts and ribosomes to bacteria.

Accepted Answer

A) True 
 B)False

Question 20

Why are cells called "the fundamental unit of life"?

Accepted Answer

A)  All known organisms have one or more cells.
B)  Earliest life on Earth is hypothesized to have been single-celled.
C)  Some cells are separate living entities that can survive individually.
D)  Cells are the smallest unit of life that can function independently.
E)  All of the choices are correct.F) D) and E)
G) A) and B)

Exam 3: Cells

What type of microscope would you use if you wanted to examine the ridges on the outside of a larval mollusk shell?

Correct AnswerverifiedShow Answer

A central vacuole

Correct AnswerverifiedShow Answer

Why are cells called "the fundamental unit of life"?

Correct AnswerverifiedShow Answer

Which of the following are cellular digestion centers?

Correct AnswerverifiedShow Answer

The function of the nucleolus is

Correct AnswerverifiedShow Answer

Mitochondrial DNA in most mammals is inherited only from the mother because a sperm cell contains no mitochondria.

Correct AnswerverifiedShow Answer

Eukaryotic cells are 10-100 times the size of prokaryotic cells.How do eukaryotic cells resolve the surface area to volume limitations that favor smaller cells?

Correct AnswerverifiedShow Answer

Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?

Correct AnswerverifiedShow Answer

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the surface area increase?

Correct AnswerverifiedShow Answer

The cytoskeleton consists of microtubules,microfilaments,and intermediate filaments.

Correct AnswerverifiedShow Answer

How do cells avoid surface area limitations?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cilia are not

Correct AnswerverifiedShow Answer

Endosymbiosis is a theory based on the resemblance of chloroplasts and ribosomes to bacteria.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",what is the role of cytoskeleton proteins in prokaryotic cells?

Correct AnswerverifiedShow Answer

The primary structural component of a cell membrane is

Correct AnswerverifiedShow Answer

Most living cells are small in size because they need a small ratio of surface area to volume.

Correct AnswerverifiedShow Answer

The original three tenets of the cell theory are that

Correct AnswerverifiedShow Answer

What type of membrane protein is involved in creating anchoring junctions between animal cells?

Correct AnswerverifiedShow Answer

Which are recycling centers for the cell?

Correct AnswerverifiedShow Answer

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