Question 1

When whole cells or large molecules in solution are engulfed by a cell,this endocytosis is specifically termed

Accepted Answer

A) pinocytosis. 
B) phagocytosis. 
C) facilitated transport. 
D) facilitated diffusion. 
E) exocytosis. 
A) pinocytosis. 
B) phagocytosis. 
C) facilitated transport. 
D) facilitated diffusion. 
E) exocytosis. B

Question 2

A loopful of bacteria containing 1000 bacterial cells is inoculated into a nutrient broth and incubated.The culture was in lag phase for 10 minutes and then went into exponential log phase growth for 5 hours.The generation time for the bacterium is 15 minutes.Which equation set up is the correct one to determine how many cells at the end of the 5 hours of log phase growth.

Accepted Answer

A) 1000 X 220 
B) 1000 X 40 
C) 1000 X 24 
D) 1000 X 5 X 2 X 15 
A) 1000 X 220 
B) 1000 X 40 
C) 1000 X 24 
D) 1000 X 5 X 2 X 15 A

Question 3

Nutrient absorption is mediated by the

Accepted Answer

A) cell wall. 
B) peptidoglycan layer. 
C) proteins in the periplasmic space. 
D) cell membrane. 
E) nuclear membrane. 
A) cell wall. 
B) peptidoglycan layer. 
C) proteins in the periplasmic space. 
D) cell membrane. 
E) nuclear membrane. D

Question 4

Calcium is required for bacteria because it

Accepted Answer

A) stabilizes the cell wall. 
B) stabilizes the ribosomes. 
C) stabilizes the nucleoid. 
D) maintains cellular pH. 
E) makes strong cell walls. 
A) stabilizes the cell wall. 
B) stabilizes the ribosomes. 
C) stabilizes the nucleoid. 
D) maintains cellular pH. 
E) makes strong cell walls.

Question 5

All of the following could find a location in or on body tissues suitable for growth except

Accepted Answer

A) psychrophiles. 
B) anaerobes. 
C) facultative anaerobes. 
D) mesophiles. 
E) capnophiles. 
A) psychrophiles. 
B) anaerobes. 
C) facultative anaerobes. 
D) mesophiles. 
E) capnophiles.

Question 6

Aerobic respiration is an example of

Accepted Answer

A) photosynthesis. 
B) methanoheterophy. 
C) photoheterotrophy. 
D) chemoheterotrophy. 
E) photoautotrophy. 
A) photosynthesis. 
B) methanoheterophy. 
C) photoheterotrophy. 
D) chemoheterotrophy. 
E) photoautotrophy.

Question 7

You want to experiment with microbial growth in various nutrients,so you inoculate a loopful of E.coli into a tube of honey.Which statement best describes what you expect to happen and why?

Accepted Answer

A) The bacterium grows incredibly well in the honey because fructose is such a great nutrient for bacteria. 
B) The bacteria do not grow because they have been dehydrated by the honey. 
C) The bacteria will not growth because the excessive sugar is directly toxic to the bacteria. 
D) The bacteria do not growth because there is only sugar in the honey,without other nutrients present they cannot survive. 
A) The bacterium grows incredibly well in the honey because fructose is such a great nutrient for bacteria. 
B) The bacteria do not grow because they have been dehydrated by the honey. 
C) The bacteria will not growth because the excessive sugar is directly toxic to the bacteria. 
D) The bacteria do not growth because there is only sugar in the honey,without other nutrients present they cannot survive.

Question 8

Most of the dry weight of a microbial cell is from

Accepted Answer

A) inorganic compounds. 
B) minerals. 
C) water. 
D) organic compounds. 
E) salts. 
A) inorganic compounds. 
B) minerals. 
C) water. 
D) organic compounds. 
E) salts.

Question 9

The direct cell count,using a cytometer,can calculate viable cell numbers from a sample without the use of dyes.

Accepted Answer

A) True 
 B)False

Question 10

Obligate saprobes can adapt to a living host.

Accepted Answer

A) True 
 B)False

Question 11

The process by which a cell uses ATP to enclose a substance in its membrane,by forming a vacuole and engulfing it,is called:

Accepted Answer

A) facilitated diffusion. 
B) diffusion. 
C) active transport. 
D) osmosis. 
E) endocytosis. 
A) facilitated diffusion. 
B) diffusion. 
C) active transport. 
D) osmosis. 
E) endocytosis.

Question 12

An important mineral ion that is a component of chlorophyll,and stabilizer of membranes and ribosomes is

Accepted Answer

A) iron. 
B) zinc. 
C) calcium. 
D) magnesium. 
E) potassium. 
A) iron. 
B) zinc. 
C) calcium. 
D) magnesium. 
E) potassium.

Question 13

A Coulter counter can count viable cells as well as determine the size.

Accepted Answer

A) True 
 B)False

Question 14

The type of photosynthesis that does not produce oxygen

Accepted Answer

A) occurs in cyanobacteria. 
B) does not require CO2 as a reactant. 
C) occurs in purple and green sulfur bacteria. 
D) does not require sunlight. 
E) occurs in algae and plants. 
A) occurs in cyanobacteria. 
B) does not require CO2 as a reactant. 
C) occurs in purple and green sulfur bacteria. 
D) does not require sunlight. 
E) occurs in algae and plants.

Question 15

When microbes live independently but cooperate and share nutrients,it is called

Accepted Answer

A) symbiosis. 
B) satellitism. 
C) antibiosis. 
D) mutualism. 
E) synergism. 
A) symbiosis. 
B) satellitism. 
C) antibiosis. 
D) mutualism. 
E) synergism.

Question 16

In _____ conditions,the cell wall will help prevent the cell from bursting.

Accepted Answer

A) hypertonic 
B) hypotonic 
C) isotonic 
D) mesotonic 
A) hypertonic 
B) hypotonic 
C) isotonic 
D) mesotonic

Question 17

A microorganism that has an optimum growth temperature of 37$\circ$ C,but can survive short exposure to high temperatures is called a/n

Accepted Answer

A) extremophile. 
B) thermophile. 
C) psychrophile. 
D) facultative psychrophile. 
E) thermoduric microbe. 
A) extremophile. 
B) thermophile. 
C) psychrophile. 
D) facultative psychrophile. 
E) thermoduric microbe.

Question 18

Microorganisms require large quantities of ______ for use in cell structure and metabolism:

Accepted Answer

A) electrolytes 
B) macronutrients 
C) water 
D) growth factors 
E) trace elements 
A) electrolytes 
B) macronutrients 
C) water 
D) growth factors 
E) trace elements

Question 19

An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a

Accepted Answer

A) heterotroph. 
B) photoautotroph. 
C) chemoheterotroph. 
D) saprobe. 
E) halotroph. 
A) heterotroph. 
B) photoautotroph. 
C) chemoheterotroph. 
D) saprobe. 
E) halotroph.

Question 20

Which of the following statements is the best explanation of why communities of microorganisms in biofilms are synergistic.

Accepted Answer

A) The various microbial species in the biofilm interact with each other. 
B) One microbial species may produce a metabolic end product that can be used as a substrate by another species. 
C) The different microbial species can all grow together. 
D) The various microbial species can change the environment to their growth advantage,allowing all to grow better. 
A) The various microbial species in the biofilm interact with each other. 
B) One microbial species may produce a metabolic end product that can be used as a substrate by another species. 
C) The different microbial species can all grow together. 
D) The various microbial species can change the environment to their growth advantage,allowing all to grow better.

Exam 7: Microbial Nutrition, Ecology, and Growth

When whole cells or large molecules in solution are engulfed by a cell,this endocytosis is specifically termed

Nutrient absorption is mediated by the

Calcium is required for bacteria because it

All of the following could find a location in or on body tissues suitable for growth except

Aerobic respiration is an example of

You want to experiment with microbial growth in various nutrients,so you inoculate a loopful of E.coli into a tube of honey.Which statement best describes what you expect to happen and why?

Most of the dry weight of a microbial cell is from

The direct cell count,using a cytometer,can calculate viable cell numbers from a sample without the use of dyes.

Obligate saprobes can adapt to a living host.

The process by which a cell uses ATP to enclose a substance in its membrane,by forming a vacuole and engulfing it,is called:

An important mineral ion that is a component of chlorophyll,and stabilizer of membranes and ribosomes is

A Coulter counter can count viable cells as well as determine the size.

The type of photosynthesis that does not produce oxygen

When microbes live independently but cooperate and share nutrients,it is called

In _____ conditions,the cell wall will help prevent the cell from bursting.

A microorganism that has an optimum growth temperature of 37 ∘\circ∘ C,but can survive short exposure to high temperatures is called a/n

Microorganisms require large quantities of ______ for use in cell structure and metabolism:

An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a

Which of the following statements is the best explanation of why communities of microorganisms in biofilms are synergistic.

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

Prokaryotic Profiles: The Bacteria and Archaea

Eukaryotic Cells and Microorganisms

An Introduction to the Viruses

Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering and Recombinant Dna

Physical and Chemical Control of Microbes

Drugs, Microbes, host-The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

Host Defenses I: Overview and Nonspecific Defenses

Host Defenses II: Specific Immunity and Immunization

Disorders in Immunity

Diagnosing Infections

Infectious Diseases Affecting the Skin and Eyes

Infectious Diseases Affecting the Nervous System

Infectious Diseases Affecting the Cardiovascular and Lymphatic Systems

Infectious Diseases Affecting the Respiratory System

Infectious Diseases Affecting the Gastrointestinal Tract

Infectious Diseases Affecting the Genitourinary System

Microbes and the Environment

Applied Microbiology and Food and Water Safety

Filters

A microorganism that has an optimum growth temperature of 37^$\circ$ C,but can survive short exposure to high temperatures is called a/n

An organism that uses CO₂ for its carbon needs and sunlight for its energy needs would be called a