Question 1

Nutrients that are used by bacteria in relatively large amounts are _______________.

Accepted Answer

The answer of Nutrients that are used by bacteria in...

Question 2

Elements that are required in relatively large amounts by microorganisms are called

Accepted Answer

A) multivitamins. 
B) meganutrients. 
C) macronutrients. 
D) macromolecules.

Question 3

A __________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.

Accepted Answer

The answer of A __________ layer consists of diffuse unorganized...

Question 4

Rigid bacteria with a helical cell shape are called

Accepted Answer

A) vibrios. 
B) spirilla. 
C) spirochetes. 
D) coccobacilli.

Question 5

A branched network of hyphae formed by the Actinomycetes is called a __________.

Accepted Answer

The answer of A branched network of hyphae formed by...

Question 6

You have been studying the effect of a concentration gradient on the rate of transport of a nutrient into a bacterial cell.If a carrier protein is involved in the transport of this nutrient,which curve would you expect to see?

Accepted Answer

A) A 
B) B 
C) C

Question 7

Gram-positive bacteria have a structurally and chemically more complex cell wall than gram-negative bacteria.

Accepted Answer

A) True 
 B)False

Question 8

Bacterial cells that are variable in shape are called

Accepted Answer

A) vibrio. 
B) pleomorphic. 
C) coccobacilli. 
D) hyphal.

Question 9

Which of the following is not considered a micronutrient?

Accepted Answer

A) Manganese (Mn) 
B) Magnesium (Mg) 
C) Zinc (Zn) 
D) Copper (Cu)

Question 10

Square planar arrangement of cells that forms when round bacteria remain attached to each other during reproduction are called

Accepted Answer

A) streptococci. 
B) staphylococci. 
C) tetrads. 
D) sarcinae.

Question 11

Flexible bacteria with a helical shape are called

Accepted Answer

A) vibrios. 
B) spirilla. 
C) spirochetes. 
D) coccobacilli.

Question 12

Bacteria have a region of the cytoplasm known as the __________,which is not bounded by a membrane but contains the chromosome.

Accepted Answer

The answer of Bacteria have a region of the cytoplasm...

Question 13

Chemotaxis is a process by which bacteria

Accepted Answer

A) move toward an attractant or away from a repellent. 
B) avoid phagocytosis. 
C) respond metabolically to the presence of autoinducer molecules. 
D) move on solid surfaces by means of type IV fimbriae.

Question 14

A wide variety of microorganisms are commercially used to manufacture _________ for human consumption.

Accepted Answer

A) vitamins 
B) sugars 
C) fatty acids 
D) none of the choices

Question 15

The rotation of bacterial flagella is powered by ATP hydrolysis.

Accepted Answer

A) True 
 B)False

Question 16

The genus of bacteria that undergoes cell division in random planes,forming grapelike clusters of round bacteria,are the __________.
or

Accepted Answer

The answer of The genus of bacteria that undergoes cell...

Question 17

Export of flagellin subunits is mediated by

Accepted Answer

A) an apparatus in the basal body of the flagellum that is related to the type II secretion pathway. 
B) the type I secretion pathway. 
C) an apparatus in the basal body of the flagellum that is related to the type III secretion pathway. 
D) None of the choices are correct.

Question 18

How do spheroplasts and protosplasts differ?

Accepted Answer

A) Spheroplasts retain the peptidoglycan but protoplasts do not. 
B) Spheroplasts retain their outer membrane but protoplasts do not. 
C) There is no difference; these terms are synonyms. 
D) Spheroplasts form from cocci and protoplasts form from bacilli.

Question 19

Which of the following is not true of bacterial plasmids?

Accepted Answer

A) They can replicate independently of the chromosome. 
B) They may carry genes for drug resistance. 
C) They are required for host growth and/or reproduction. 
D) They may carry genes that enhance survival of the bacterium under certain conditions.

Question 20

__________ is the main part of the process through which a vegetative cell is formed from an endospore.

Accepted Answer

The answer of __________ is the main part of the...

Exam 3: Bacterial Cell Structure