Question 1

Organisms that can use oxygen for metabolic reactions but can also function in an environment devoid of oxygen are termed

Accepted Answer

A)  aerobes 
B)  anaerobes 
C)  aerophiles 
D)  facultative anaerobes 
A)  aerobes 
B)  anaerobes 
C)  aerophiles 
D)  facultative anaerobes

Question 2

The prokaryotic aerobic metabolism of glucose produces a total (net)of ________ molecules of ATP.

Accepted Answer

A)  24 
B)  30 
C)  34 
D)  38 
A)  24 
B)  30 
C)  34 
D)  38

Question 3

Which of the following is not a carrier molecule that carries hydrogen atoms or electrons in oxidative reactions?

Accepted Answer

A)  Iron 
B)  FAD 
C)  Niacin 
D)  NAD 
A)  Iron 
B)  FAD 
C)  Niacin 
D)  NAD

Question 4

Digestive reactions where large molecules are broken down into smaller ones is called:

Accepted Answer

A)  metabolism 
B)  catabolism 
C)  biosynthesis 
D)  anabolism 
A)  metabolism 
B)  catabolism 
C)  biosynthesis 
D)  anabolism

Question 5

The first step in protein metabolism is the breakdown of proteins into

Accepted Answer

A)  nucleotides 
B)  fatty acids 
C)  amino acids 
D)  coenzymes 
A)  nucleotides 
B)  fatty acids 
C)  amino acids 
D)  coenzymes

Question 6

Enzymes work by

Accepted Answer

A)  lowering the energy of the reactants 
B)  raising the energy of the products 
C)  decreasing the activation energy of the reaction 
D)  increasing the activation energy of the reaction 
A)  lowering the energy of the reactants 
B)  raising the energy of the products 
C)  decreasing the activation energy of the reaction 
D)  increasing the activation energy of the reaction

Question 7

What is returned to chlorophyll in cyclic photophosphorylation that is not returned in noncyclic photoreduction?

Accepted Answer

A)  ATP 
B)  light 
C)  energy 
D)  electrons 
A)  ATP 
B)  light 
C)  energy 
D)  electrons

Question 8

Factors that affect the rate of enzyme catalyzed reactions include

Accepted Answer

A)  temperature 
B)  pH 
C)  concentration of enzyme 
D)  all of the above 
A)  temperature 
B)  pH 
C)  concentration of enzyme 
D)  all of the above

Question 9

In aerobic respiration,the final electron acceptor is

Accepted Answer

A)  water 
B)  oxygen 
C)  sulfur 
D)  coenzyme Q 
A)  water 
B)  oxygen 
C)  sulfur 
D)  coenzyme Q

Question 10

Competitive inhibition of enzymes occurs when

Accepted Answer

A)  the inhibitor binds to the active site of the enzyme 
B)  the inhibitor binds to the allosteric site of the enzyme 
C)  the inhibitor changes the shape of the enzyme 
D)  the inhibitor is acted upon by the enzyme 
A)  the inhibitor binds to the active site of the enzyme 
B)  the inhibitor binds to the allosteric site of the enzyme 
C)  the inhibitor changes the shape of the enzyme 
D)  the inhibitor is acted upon by the enzyme

Question 11

Which statement about fermentation is true?

Accepted Answer

A)  all fermentation of pyruvic acid always results in the same end product 
B)  all fermentation of glucose begins with pyruvic acid as a substrate 
C)  the same fermentation reaction produces both wine and cheese 
D)  none of the above 
A)  all fermentation of pyruvic acid always results in the same end product 
B)  all fermentation of glucose begins with pyruvic acid as a substrate 
C)  the same fermentation reaction produces both wine and cheese 
D)  none of the above

Question 12

Which one of the following pairs is mismatched?

Accepted Answer

A)  alcohol - fermentation 
B)  pyruvate - glycolysis 
C)  carbon dioxide - glycolysis 
D)  NADH - Krebs cycle 
A)  alcohol - fermentation 
B)  pyruvate - glycolysis 
C)  carbon dioxide - glycolysis 
D)  NADH - Krebs cycle

Question 13

Bioluminescent microbes

Accepted Answer

A)  may have evolved to remove oxygen from the atmosphere 
B)  are often beneficiares of symbiotic relationships with a larger host, producing light in exchange for nutrients 
C)  often have the enzyme luciferase which catalyzes the oxidation reaction that emits light 
D)  all of the above 
A)  may have evolved to remove oxygen from the atmosphere 
B)  are often beneficiares of symbiotic relationships with a larger host, producing light in exchange for nutrients 
C)  often have the enzyme luciferase which catalyzes the oxidation reaction that emits light 
D)  all of the above

Question 14

Which of the following statements about enzyme inhibition is true?

Accepted Answer

A)  most noncompetitive inhibitors bind to several different sites on an enzyme 
B)  enzymes become less efficient as temperatures drop because they begin to denature 
C)  noncompetitive inhibitors bind to a site other than the active site 
D)  most human enzymes have an optimum temperature below normal body temperature 
A)  most noncompetitive inhibitors bind to several different sites on an enzyme 
B)  enzymes become less efficient as temperatures drop because they begin to denature 
C)  noncompetitive inhibitors bind to a site other than the active site 
D)  most human enzymes have an optimum temperature below normal body temperature

Question 15

Which statement is true about enzymes?

Accepted Answer

A)  Enzyme catalyzed reactions would not go forward without their specific enzymes. 
B)  Most enzymes catalyze several different reactions. 
C)  Coenzymes are organic molecules while cofactors are inorganic molecules. 
D)  A holoenzyme is an apoenzyme that is missing its cofactor. 
A)  Enzyme catalyzed reactions would not go forward without their specific enzymes. 
B)  Most enzymes catalyze several different reactions. 
C)  Coenzymes are organic molecules while cofactors are inorganic molecules. 
D)  A holoenzyme is an apoenzyme that is missing its cofactor.

Question 16

Organisms which get their carbon from other organisms are

Accepted Answer

A)  autotrophs 
B)  chemotrophs 
C)  phototrophs 
D)  heterotrophs 
A)  autotrophs 
B)  chemotrophs 
C)  phototrophs 
D)  heterotrophs

Question 17

An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's ______ site.

Accepted Answer

A)  catalytic 
B)  allosteric 
C)  operative 
D)  active 
A)  catalytic 
B)  allosteric 
C)  operative 
D)  active

Question 18

Oxidation is defined as the ________ while reduction is the ________ .

Accepted Answer

A)  gain of electrons, loss of protons 
B)  loss of electrons, gain of protons 
C)  loss of electrons, gain of electrons 
D)  loss of protons, gain of protons 
A)  gain of electrons, loss of protons 
B)  loss of electrons, gain of protons 
C)  loss of electrons, gain of electrons 
D)  loss of protons, gain of protons

Question 19

In fermentation reactions occurring in yeast to produce wine,two products of the reaction are __________ and _________

Accepted Answer

A)  acid; hydrogen gas 
B)  hydrogen gas; propionic acid 
C)  ethyl alcohol; methane 
D)  carbon dioxide; ethyl alcohol 
A)  acid; hydrogen gas 
B)  hydrogen gas; propionic acid 
C)  ethyl alcohol; methane 
D)  carbon dioxide; ethyl alcohol

Question 20

The end product of glycolysis is

Accepted Answer

A)  fructose-1,6-diphosphate 
B)  1,3 diphosphoglyceric acid 
C)  phosphoenolpyruvic acid 
D)  pyruvic acid 
A)  fructose-1,6-diphosphate 
B)  1,3 diphosphoglyceric acid 
C)  phosphoenolpyruvic acid 
D)  pyruvic acid

Exam 5: Essential Concepts of Metabolism

Organisms that can use oxygen for metabolic reactions but can also function in an environment devoid of oxygen are termed

The prokaryotic aerobic metabolism of glucose produces a total (net)of ________ molecules of ATP.

Which of the following is not a carrier molecule that carries hydrogen atoms or electrons in oxidative reactions?

Digestive reactions where large molecules are broken down into smaller ones is called:

The first step in protein metabolism is the breakdown of proteins into

Enzymes work by

What is returned to chlorophyll in cyclic photophosphorylation that is not returned in noncyclic photoreduction?

Factors that affect the rate of enzyme catalyzed reactions include

In aerobic respiration,the final electron acceptor is

Competitive inhibition of enzymes occurs when

Which statement about fermentation is true?

Which one of the following pairs is mismatched?

Bioluminescent microbes

Which of the following statements about enzyme inhibition is true?

Which statement is true about enzymes?

Organisms which get their carbon from other organisms are

An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's ______ site.

Oxidation is defined as the ________ while reduction is the ________ .

In fermentation reactions occurring in yeast to produce wine,two products of the reaction are __________ and _________

The end product of glycolysis is

Scope and History of Microbiology

Fundamentals of Chemistry

Microscopy and Staining

Characteristics of Prokaryotic and Eukaryotic Cells

Growth and Culturing of Bacteria

Microbial Genetics

Gene Transfer and Genetic Engineering

An Introduction to Taxonomy: the Bacteria

Viruses

Eukaryotic Microorganisms and Parasites

Sterilization and Disinfection

Antimicrobial Therapy

Host-Microbe Relationships and Disease Processes

Epidemiology and Nosocomial Infections

Innate Host Defenses

Immunology I: Basic Principles of Adaptive Immunity and Immunization

Immunolgy Ii: Immunological Disorders and Tests

Diseases of the Skin and Eyes; Wounds and Bites

Urogenital and Sexually Transmitted Diseases

Diseases of the Respiratory System

Oral and Gastrointestinal Diseases

Cardiovascular, lymphatic and Systemic Disease

Diseases of the Nervous System

Environmental Microbiology

Applied Microbiology

Filters

Oxidation is defined as the while reduction is the .

In fermentation reactions occurring in yeast to produce wine,two products of the reaction are __ and _