Question 1

Osmosis most directly involves:

Accepted Answer

A)  water moving down a concentration gradient
B)  organic molecules crossing a membrane
C)  energy being expended to import large molecules into the cell
D)  sugars and salts moving down their concentration gradientE) B) and D)
F) B) and C)

Question 2

Which of the following statements about motility is false?

Accepted Answer

A)  Chemotaxis is the movement of bacteria toward or away from a chemical.
B)  Pseudopodia are associated with fungi.
C)  Bacteria use helical flagellar movements to orient towards external signals.
D)  Pseudopodia are temporary projections of cytoplasm.E) All of the above
F) A) and D)

Question 3

Endospores are typically found in the genus:

Accepted Answer

A)  Streptococcus
B)  Clostridium
C)  Mycobacterium
D)  StaphylococciE) None of the above
F) All of the above

Question 4

Which of the following is not found in bacterial cells?

Accepted Answer

A)  A cell membrane, usually surrounded by a cell wall
B)  An internal cytoplasm with ribosomes, a nuclear region and in some cases granules
C)  A variety of external structures, such as capsules, flagella and pili
D)  Respiratory enzymes contained in an internal structure surrounded by membranesE) None of the above
F) A) and B)

Question 5

Some bacteria can transfer DNA to another cell using:

Accepted Answer

A)  conjugation pili
B)  fimbriae
C)  axial filaments
D)  lophotrichous flagellaE) A) and B)
F) B) and C)

Question 6

Inclusions found in bacteria generally would not include:

Accepted Answer

A)  granules
B)  volutin
C)  metachromatic granules
D)  ribosomesE) B) and C)
F) A) and D)

Question 7

Which is the correct ordering of cell wall components starting from outside the cell and going inward?

Accepted Answer

A)  In Gram-positive bacteria: peptidoglycan, cell membrane
B)  In Gram-negative bacteria: peptidoglycan, lipopolysaccharide, periplasmic space, outer membrane, cell membrane
C)  In acid fast bacteria: peptidoglycan, lipid layer, cell membrane
D)  In Gram-negative bacteria: peptidoglycan, periplasmic space, lipid membraneE) B) and C)
F) A) and C)

Question 8

The most important structural component of bacterial cell walls is _____.

Accepted Answer

A)  teichoic acid
B)  lipotechoic acid
C)  peptidoglycan
D)  glutamic acidE) A) and B)
F) None of the above

Question 9

Which of the following cellular structures can be found in both prokaryotic and eukaryotic cells?

Accepted Answer

A)  Golgi apparatus
B)  lysosomes
C)  peroxisomes
D)  ribosomesE) A) and C)
F) A) and D)

Question 10

Which of the following is responsible for converting sunlight into chemical energy?

Accepted Answer

A)  Chromatophores
B)  Chloroplasts
C)  Endoplasmic reticulum
D)  Two of the aboveE) None of the above
F) C) and D)

Question 11

Peptidoglycan makes up more than 50% of a ________ cell wall.

Accepted Answer

A)  Gram negative
B)  Gram positive
C)  Gram variable
D)  acid-fastE) None of the above
F) A) and D)

Question 12

What supports the idea that prokaryotes were involved in the evolution of eukaryotes by means of endosymbiosis?

Accepted Answer

Evidence supporting the idea that prokar...

Question 13

A charged molecule which moves down its concentration gradient and across a pore in a cell membrane without energy being expended by the cell is experiencing _____.

Accepted Answer

A)  simple diffusion
B)  osmosis
C)  active transport
D)  facilitated diffusionE) All of the above
F) B) and C)

Question 14

The charged,phosphate end of a membrane phospholipid is:

Accepted Answer

A)  water-fearing
B)  hydrophilic
C)  hydrophobic
D)  none of the aboveE) None of the above
F) B) and D)

Question 15

Bacteria move by means of:

Accepted Answer

A)  cilia
B)  flagella
C)  fimbriae
D)  piliE) B) and C)
F) B) and D)

Question 16

During diffusion,molecules _____.

Accepted Answer

A)  move from hotter areas to cooler areas
B)  move from areas of higher concentration to areas of lower concentration
C)  move from areas of lower concentration to areas of higher concentration
D)  expend energy to more aroundE) A) and C)
F) None of the above

Question 17

What is the function of gas-filled vacuoles in aquatic photosynthetic bacteria?

Accepted Answer

A)  transducers to detect chemicals and signal the cells to respond
B)  regulate the depth at which they float by changing amount of gas in vacuoles
C)  change the handedness of the helix in which the bacteria is moving
D)  allows the bacteria to respond to magnetic fieldsE) C) and D)
F) A) and B)

Question 18

A typical bacterial cell has a salt concentration of about 1%. If the cell is placed in a solution containing 10% salt,the net flow of water will be _____.

Accepted Answer

A)  out of the cell
B)  into the cell
C)  equally in and out of the cell
D)  none of the above since water doesn't cross bacterial cell membranesE) A) and D)
F) B) and D)

Question 19

In bacteria,the cell membrane functions in the all of the following ways EXCEPT:

Accepted Answer

A)  regulates movement of materials into and out of the cell
B)  synthesizes cell wall components
C)  serves as the site for protein synthesis
D)  assists with DNA replicationE) C) and D)
F) None of the above

Question 20

Which of the following statements is false?

Accepted Answer

A)  All bacteria are capable of forming capsules.
B)  The chemical composition of each capsule is unique to a particular strain of bacteria.
C)  Slime layers are usually thinner than capsules.
D)  A slime layer protects bacteria against drying and helps trap nutrients near a cell.E) All of the above
F) B) and C)

Exam 4: Characteristics of Prokaryotic and Eukaryotic Cells

What is the function of gas-filled vacuoles in aquatic photosynthetic bacteria?

Correct AnswerverifiedShow Answer

Some bacteria can transfer DNA to another cell using:

Correct AnswerverifiedShow Answer

In bacteria,the cell membrane functions in the all of the following ways EXCEPT:

Correct AnswerverifiedShow Answer

The most important structural component of bacterial cell walls is _____.

Correct AnswerverifiedShow Answer

Which of the following statements about motility is false?

Correct AnswerverifiedShow Answer

A typical bacterial cell has a salt concentration of about 1%. If the cell is placed in a solution containing 10% salt,the net flow of water will be _____.

Correct AnswerverifiedShow Answer

The charged,phosphate end of a membrane phospholipid is:

Correct AnswerverifiedShow Answer

A charged molecule which moves down its concentration gradient and across a pore in a cell membrane without energy being expended by the cell is experiencing _____.

Correct AnswerverifiedShow Answer

Which of the following cellular structures can be found in both prokaryotic and eukaryotic cells?

Correct AnswerverifiedShow Answer

Inclusions found in bacteria generally would not include:

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

Endospores are typically found in the genus:

Correct AnswerverifiedShow Answer

Bacteria move by means of:

Correct AnswerverifiedShow Answer

Peptidoglycan makes up more than 50% of a ________ cell wall.

Correct AnswerverifiedShow Answer

What supports the idea that prokaryotes were involved in the evolution of eukaryotes by means of endosymbiosis?

Correct AnswerverifiedEvidence supporting the idea that prokar...View AnswerShow Answer

Which is the correct ordering of cell wall components starting from outside the cell and going inward?

Correct AnswerverifiedShow Answer

Osmosis most directly involves:

Correct AnswerverifiedShow Answer

Which of the following is not found in bacterial cells?

Correct AnswerverifiedShow Answer

Which of the following is responsible for converting sunlight into chemical energy?

Correct AnswerverifiedShow Answer

During diffusion,molecules _____.

Correct AnswerverifiedShow Answer

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Evidence supporting the idea that prokar...
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