Question 1

The smallest certifiable living organism is:

Accepted Answer

A)  A bacterium called Mycoplasma
B)  A virus
C)  A nanobe
D)  A protozoan called Giardia
E)  All are correctF) A) and C)
G) None of the above

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)  Tubulin
B)  Actin
C)  Intermediate filaments
D)  Flagella
E)  CiliaF) B) and E)
G) B) and D)

Question 4

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 mRNAF) A) and D)
G) A) and C)

Question 5

Tubulin is necessary for ____ in bacteria and archaea?

Accepted Answer

A)  DNA replication
B)  Transcription
C)  Translation
D)  Cell division
E)  Cell structureF) A) and E)
G) A) and C)

Question 6

Which are recycling centers for the cell?

Accepted Answer

A)  Ribosome and Golgi apparatus
B)  Endoplasmic reticulum and chloroplast
C)  Mitochondria and nucleus
D)  Central vacuole and lysosome
E)  All are correctF) A) and E)
G) None of the above

Question 7

A cytoskeleton is:

Accepted Answer

A)  A structure that aids in the process of cell division
B)  Found in the cytoplasm of eukaryotic cells
C)  A system of tracks used for transport
D)  Composed of microtubules and microfilaments
E)  All are correctF) None of the above
G) A) and D)

Question 8

The rough or smooth endoplasmic reticulum do not:

Accepted Answer

A)  Produce proteins
B)  Produce lipids
C)  Detoxify poisons
D)  Produce mRNA
E)  Form vesicles for transport to the Golgi apparatusF) None of the above
G) B) and E)

Question 9

When the scientists mutated the MreB and Mbl genes what did they mutate?

Accepted Answer

A)  DNA
B)  RNA
C)  Actin protein
D)  The entire cell
E)  Tubulin proteinF) D) and E)
G) None of the above

Question 10

What fundamental question were the scientists in these projects asking?

Accepted Answer

A)  Were tubulin and actin in ancestors common to prokaryotes and eukaryotes?
B)  Were tubulin and actin in ancestors common to eukaryotes?
C)  Are tubulin and actin in eukaryotes?
D)  What is the structure of bacterial tubulin and actin?
E)  Will bacterial tubulin and actin function in a eukaryotic cell?F) A) and B)
G) A) and D)

Question 11

The kingdoms in the domain Eukarya include:

Accepted Answer

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

Question 12

When phospholipids are mixed with water their ____ interact with water and their ____ are repelled,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 headsE) A) and B)
F) None of the above

Question 13

An understanding of cellular biology is helping us find new treatments for many diseases.

Accepted Answer

A) True 
 B)False

Question 14

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 are correctF) A) and C)
G) C) and D)

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

A prokaryotic cell:

Accepted Answer

A)  Has a nucleus
B)  Does not have a nucleus
C)  Has a cell wall made of chitin
D)  Is at least ten micrometers in diameter
E)  Has membrane-bounded organellesF) A) and B)
G) B) and E)

Question 17

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

Accepted Answer

A)  Maximize the relative surface area to exchange nutrients and gasses
B)  Maximize the relative surface area for cooling
C)  Provide more volume to store more organelles
D)  Provide more volume to store more nutrients
E)  Saves energy by making more membrane relative to the volume of the cellF) A) and E)
G) D) and E)

Question 18

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)  Gap junction
B)  Plasmodesmata
C)  Anchoring junction
D)  Cell wall
E)  Tight junctionF) A) and B)
G) A) and C)

Question 19

You discover a new life form,and study it under an electron microscope.You find that it has 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)  AnimaliaF) A) and C)
G) B) and D)

Question 20

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

Accepted Answer

A)  The father only
B)  The mother and father
C)  Neither parent
D)  The mother onlyE) A) and D)
F) C) and D)

Exam 3: The Dynamic Cell

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

Correct AnswerverifiedShow Answer

Which are recycling centers for the cell?

Correct AnswerverifiedShow Answer

Penicillin halts bacterial infections:

Correct AnswerverifiedShow Answer

What fundamental question were the scientists in these projects asking?

Correct AnswerverifiedShow Answer

Tubulin is necessary for ____ in bacteria and archaea?

Correct AnswerverifiedShow Answer

When the scientists mutated the MreB and Mbl genes what did they mutate?

Correct AnswerverifiedShow Answer

The function of the nucleolus is:

Correct AnswerverifiedShow Answer

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

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.Which of the following would prevent bacteria from moving between intestinal cells?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The kingdoms in the domain Eukarya include:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A prokaryotic cell:

Correct AnswerverifiedShow Answer

An understanding of cellular biology is helping us find new treatments for many diseases.

Correct AnswerverifiedShow Answer

The rough or smooth endoplasmic reticulum do not:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The smallest certifiable living organism is:

Correct AnswerverifiedShow Answer

A cytoskeleton is:

Correct AnswerverifiedShow Answer

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When phospholipids are mixed with water their interact with water and their are repelled,forming a lipid bilayer.

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