Question 1

The charged,phosphate end of a membrane phospholipid is:

Accepted Answer

A)  water-fearing
B)  hydrophilic
C)  hydrophobic
D)  none of theseE) B) and D)
F) A) and B)

Question 2

Endospores are typically found in the genus:

Accepted Answer

A)  Streptococcus
B)  Clostridium
C)  Mycobacterium
D)  StaphylococciE) B) and C)
F) A) and D)

Question 3

The cytoskeleton consists of _____.

Accepted Answer

A)  microfilaments and sterols
B)  microtubules and proteins
C)  microfilaments and microtubules
D)  sterols and proteinsE) All of the above
F) B) and D)

Question 4

Which bacterial genus normally lacks a cell wall

Accepted Answer

A)  Mycobacterium
B)  Streptococcus
C)  Mycoplasma
D)  BacillusE) C) and D)
F) All of the above

Question 5

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) A) and B)
F) A) and C)

Question 6

Endospores are usually induced to form when:

Accepted Answer

A)  temperatures rise
B)  certain nutrient are depleted
C)  radiation is detected
D)  water is lost from the cellE) None of the above
F) A) and B)

Question 7

Bacteria move by means of:

Accepted Answer

A)  cilia
B)  flagella
C)  fimbriae
D)  piliE) C) and D)
F) None of the above

Question 8

_____ occurs when bacteria differ widely in form.

Accepted Answer

A)  Pleomorphism
B)  Polymorphism
C)  Anamorphism
D)  TelomorphismE) B) and C)
F) All of the above

Question 9

Mycolic acid would be found primarily in the cell wall of:

Accepted Answer

A)  Gram positive bacteria
B)  Gram negative bacteria
C)  Gram variable bacteria
D)  Acid-fast bacteriaE) A) and B)
F) C) and D)

Question 10

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

Accepted Answer

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

Question 11

The periplasmic space is found _____.

Accepted Answer

A)  only in Gram positive organisms
B)  between the nuclear area and the cell membrane
C)  primarily in acid fast bacteria
D)  between the innercell membrane and outer cell wall membraneE) A) and D)
F) All of the above

Question 12

The rough endoplasmic reticulum appears rough because of _____.

Accepted Answer

A)  sterols in its membrane
B)  fats and sugars on its surface
C)  multiple ribosomes on its surface
D)  proteins in the lumen of the ERE) A) and B)
F) A) and C)

Question 13

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

Accepted Answer

A)  teichoic acid
B)  lipotechoic acid
C)  peptidoglycan
D)  glutamic acidE) B) and D)
F) A) and C)

Question 14

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) None of the above
F) B) and D)

Question 15

Which of the following statements about the endosymbiotic hypothesis is false

Accepted Answer

A)  Eukaryotic cells have both 70S and 80S ribosomes.
B)  Mitochondria have their own DNA.
C)  When removed from cells,mitochondria continue to grow and divide.
D)  Mitochondria are about the same size as prokaryotic cells.E) B) and C)
F) B) and D)

Question 16

Which of the following statements about the prokaryotic cells surface-to-volume ratio is false

Accepted Answer

A)  Because of their small size,bacteria have a small surface-to-volume ratio.
B)  Eukaryotes have surface-to-volume ratio that is only 1/10 that of prokaryotes.
C)  The prokaryotes surface-to-volume ratio means that nutrients can easily and quickly reach all parts of the cell as no internal part of the cell is very far from the surface.
D)  A bacteria with a surface area of about 12 microns squared and a volume of 4 cubic microns has a surface-to-volume ratio of 3:1.E) A) and D)
F) A) and B)

Question 17

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) C) and D)
F) B) and C)

Question 18

Removal of the cell wall of a Gram positive bacteria results in the formation of a _____.

Accepted Answer

A)  protoplast
B)  spheroplast
C)  periplast
D)  polyplastE) A) and B)
F) B) and C)

Question 19

Prokaryotic cells divide by _____.

Accepted Answer

A)  mitosis
B)  binary fission
C)  meiosis
D)  mitosis asexually and meiosis sexuallyE) B) and C)
F) All of the above

Question 20

When the fluid within a cell has a higher concentration of dissolved substances than the fluid surrounding the cell,we say the fluid surrounding the cell is _____.

Accepted Answer

A)  hypertonic
B)  isotonic
C)  superhypertonic
D)  hypotonicE) A) and C)
F) B) and C)

Exam 5: Characteristics of Prokaryotic and Eukaryotic Cells

Which of the following statements is false

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Which of the following statements about the prokaryotic cells surface-to-volume ratio is false

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Mycolic acid would be found primarily in the cell wall of:

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Bacteria move by means of:

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Removal of the cell wall of a Gram positive bacteria results in the formation of a _____.

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Which of the following statements about motility is false

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The rough endoplasmic reticulum appears rough because of _____.

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Which of the following statements about the endosymbiotic hypothesis is false

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

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Prokaryotic cells divide by _____.

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The charged,phosphate end of a membrane phospholipid is:

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Osmosis most directly involves:

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Which bacterial genus normally lacks a cell wall

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The cytoskeleton consists of _____.

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The periplasmic space is found _____.

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_____ occurs when bacteria differ widely in form.

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Endospores are usually induced to form when:

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Endospores are typically found in the genus:

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

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When the fluid within a cell has a higher concentration of dissolved substances than the fluid surrounding the cell,we say the fluid surrounding the cell is _____.

Correct AnswerverifiedShow Answer

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