Question 1

Figure $28.3$
 
-Which of the growth curves in Figure 28.3 will give the highest yield of a secondary metabolite?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  e 
A)  a 
B)  b 
C)  c 
D)  d 
E)  e

Question 2

Microorganisms play an active role in the formation of industrial products. Which of the following is mismatched?

Accepted Answer

A)  Rhizobium - increases nitrogen in the soil 
B)  Penicillium - treatment of disease 
C)  Saccharomyces cerevisiae - for fermentation 
D)  Bacillus thuringiensis - insecticide 
E)  algae - citric acid 
A)  Rhizobium - increases nitrogen in the soil 
B)  Penicillium - treatment of disease 
C)  Saccharomyces cerevisiae - for fermentation 
D)  Bacillus thuringiensis - insecticide 
E)  algae - citric acid

Question 3

All of the following foods are produced using microbial fermentations EXCEPT

Accepted Answer

A)  ketchup. 
B)  sauerkraut. 
C)  coffee. 
D)  sour cream. 
E)  yogurt. 
A)  ketchup. 
B)  sauerkraut. 
C)  coffee. 
D)  sour cream. 
E)  yogurt.

Question 4

Write 'T' if the statement is true and 'F' if the statement is false.
-High-pressure processing of foods such as deli meats and precooked chicken strips targets
pathogens such as C. botulinum.

Accepted Answer

A) True 
 B)False

Question 5

Spoilage of canned foods due to inadequate processing, NOT accompanied by gas production, is

Accepted Answer

A)  spoilage by mesophilic bacteria. 
B)  thermophilic anaerobic spoilage. 
C)  putrefactive anaerobic spoilage. 
D)  caused by acid-tolerant fungi. 
E)  flat sour spoilage. 
A)  spoilage by mesophilic bacteria. 
B)  thermophilic anaerobic spoilage. 
C)  putrefactive anaerobic spoilage. 
D)  caused by acid-tolerant fungi. 
E)  flat sour spoilage.

Question 6

All of the following are fuels produced by microorganisms EXCEPT

Accepted Answer

A)  oil from algae. 
B)  hydrogen. 
C)  methane. 
D)  cellulose. 
E)  ethanol. 
A)  oil from algae. 
B)  hydrogen. 
C)  methane. 
D)  cellulose. 
E)  ethanol.

Question 7

Write 'T' if the statement is true and 'F' if the statement is false.
-Industrial canning is achieved using a pressure cooker which operates in a manner similar to an
autoclave.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is an undesirable contaminant in wine-making?

Accepted Answer

A)  lactic acid bacteria 
B)  Saccharomyces 
C)  Acetobacter 
D)  Bacillus 
E)  Clostridium 
A)  lactic acid bacteria 
B)  Saccharomyces 
C)  Acetobacter 
D)  Bacillus 
E)  Clostridium

Question 9

The following steps are required for making cheese. What is the second step?

Accepted Answer

A)  inoculation with lactic acid bacteria 
B)  enzymatic coagulation of milk 
C)  inoculation with Penicillium 
D)  fermentation of curd 
E)  separation of curds and whey 
A)  inoculation with lactic acid bacteria 
B)  enzymatic coagulation of milk 
C)  inoculation with Penicillium 
D)  fermentation of curd 
E)  separation of curds and whey

Question 10

Microbial products can be improved by all of the following EXCEPT

Accepted Answer

A)  genetically modifying strains. 
B)  isolating new strains. 
C)  mutating existing strains. 
D)  modifying culture conditions. 
E)  sterilization. 
A)  genetically modifying strains. 
B)  isolating new strains. 
C)  mutating existing strains. 
D)  modifying culture conditions. 
E)  sterilization.

Question 11

Xanthan used in household products is produced by bacteria

Accepted Answer

A)  that were irradiated to mutate them. 
B)  that were genetically modified. 
C)  that are plant pathogens. 
D)  selected for their ability to utilize lactose. 
E)  selected for their ability to utilize lactose and that are plant pathogens. 
A)  that were irradiated to mutate them. 
B)  that were genetically modified. 
C)  that are plant pathogens. 
D)  selected for their ability to utilize lactose. 
E)  selected for their ability to utilize lactose and that are plant pathogens.

Question 12

Biomass is a renewable energy source derived from the organic matter produced by living organisms. All of the following are sources of biomass EXCEPT

Accepted Answer

A)  bacteria. 
B)  algae. 
C)  landfill sites. 
D)  crops. 
E)  oxidation of metals. 
A)  bacteria. 
B)  algae. 
C)  landfill sites. 
D)  crops. 
E)  oxidation of metals.

Question 13

Canning works to preserve foods through

Accepted Answer

A)  exposure to high heat. 
B)  creation of an anaerobic environment. 
C)  mutation of bacterial DNA. 
D)  creation of an anaerobic environment and high heat. 
E)  increasing pH. 
A)  exposure to high heat. 
B)  creation of an anaerobic environment. 
C)  mutation of bacterial DNA. 
D)  creation of an anaerobic environment and high heat. 
E)  increasing pH.

Question 14

Write 'T' if the statement is true and 'F' if the statement is false.
-The blue-green clumps observed in Roquefort cheese are a result of mold growth.

Accepted Answer

A) True 
 B)False

Question 15

Thiobacillus ferrooxidans is used for the recovery of _________ from ore.

Accepted Answer

A)  copper 
B)  sulfuric acid 
C)  gold 
D)  iron 
E)  sulfur 
A)  copper 
B)  sulfuric acid 
C)  gold 
D)  iron 
E)  sulfur

Question 16

Aseptic packaging utilizes which of the following to sterilize laminated paper or plastic prior to filling with food?

Accepted Answer

A)  X rays 
B)  hot HCl solution 
C)  gamma radiation 
D)  autoclave 
E)  hot hydrogen peroxide solution 
A)  X rays 
B)  hot HCl solution 
C)  gamma radiation 
D)  autoclave 
E)  hot hydrogen peroxide solution

Question 17

All of the following are reasons for utilizing algae for biofuel production EXCEPT

Accepted Answer

A)  they can utilize agriculturally poor land. 
B)  their main requirement is abundant light. 
C)  they do not take up land needed for food production. 
D)  they produce more energy per acre than corn. 
E)  they produce a nondegradable waste product. 
A)  they can utilize agriculturally poor land. 
B)  their main requirement is abundant light. 
C)  they do not take up land needed for food production. 
D)  they produce more energy per acre than corn. 
E)  they produce a nondegradable waste product.

Question 18

You are growing Bacillus subtilis in a bioreactor and notice that the growth rate has slowed and the pH has decreased. You suspect the bacteria are

Accepted Answer

A)  using the Krebs cycle. 
B)  photosynthesizing. 
C)  fermenting. 
D)  dead. 
E)  using proteins. 
A)  using the Krebs cycle. 
B)  photosynthesizing. 
C)  fermenting. 
D)  dead. 
E)  using proteins.

Exam 24: The Wave Nature of Light

Figure 28.328.328.3 -Which of the growth curves in Figure 28.3 will give the highest yield of a secondary metabolite?

Microorganisms play an active role in the formation of industrial products. Which of the following is mismatched?

All of the following foods are produced using microbial fermentations EXCEPT

Write 'T' if the statement is true and 'F' if the statement is false. -High-pressure processing of foods such as deli meats and precooked chicken strips targets pathogens such as C. botulinum.

Spoilage of canned foods due to inadequate processing, NOT accompanied by gas production, is

All of the following are fuels produced by microorganisms EXCEPT

Write 'T' if the statement is true and 'F' if the statement is false. -Industrial canning is achieved using a pressure cooker which operates in a manner similar to an autoclave.

Which of the following is an undesirable contaminant in wine-making?

The following steps are required for making cheese. What is the second step?

Microbial products can be improved by all of the following EXCEPT

Xanthan used in household products is produced by bacteria

Biomass is a renewable energy source derived from the organic matter produced by living organisms. All of the following are sources of biomass EXCEPT

Canning works to preserve foods through

Write 'T' if the statement is true and 'F' if the statement is false. -The blue-green clumps observed in Roquefort cheese are a result of mold growth.

Thiobacillus ferrooxidans is used for the recovery of _________ from ore.

Aseptic packaging utilizes which of the following to sterilize laminated paper or plastic prior to filling with food?

All of the following are reasons for utilizing algae for biofuel production EXCEPT

You are growing Bacillus subtilis in a bioreactor and notice that the growth rate has slowed and the pH has decreased. You suspect the bacteria are

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Figure $28.3$ -Which of the growth curves in Figure 28.3 will give the highest yield of a secondary metabolite?