Question 1

Strains of pneumonia-causing ______ are becoming resistant to every available antibiotic.

Accepted Answer

A)  Klebsiella 
B)  Staphylococcus 
C)  Pneumatococcus 
D)  Botulinum 
E)  Streptococcus 
A)  Klebsiella 
B)  Staphylococcus 
C)  Pneumatococcus 
D)  Botulinum 
E)  Streptococcus

Question 2

Which of the following is TRUE of bacterial reproduction?

Accepted Answer

A)  The daughter cells are identical to the parent cell. 
B)  One cell divides to produce four cells. 
C)  Reproduction is sexual and thus allows for genetic diversity in the new cells. 
D)  It takes 24 hours for a bacterial population to double in size. 
E)  Bacterial reproduction is called binary fusion. 
A)  The daughter cells are identical to the parent cell. 
B)  One cell divides to produce four cells. 
C)  Reproduction is sexual and thus allows for genetic diversity in the new cells. 
D)  It takes 24 hours for a bacterial population to double in size. 
E)  Bacterial reproduction is called binary fusion.

Question 3

A student who shares a dorm suite and bathroom with seven other students has contracted a skin infection caused by MRSA.Based on what you know about MRSA and about the student,where would you look first for the source of the bacteria?

Accepted Answer

A)  contaminated equipment at the gym 
B)  contaminated shared food 
C)  contaminated used soap and towels 
D)  a suitemate with an upper respiratory infection who is sneezing and coughing 
E)  shared hypodermic needles 
A)  contaminated equipment at the gym 
B)  contaminated shared food 
C)  contaminated used soap and towels 
D)  a suitemate with an upper respiratory infection who is sneezing and coughing 
E)  shared hypodermic needles

Question 4

What would the outcome be if a homogeneous (no variation)antibiotic-sensitive strain of S.aureus was grown in the presence of antibiotics? Why?

Accepted Answer

Population is homogeneous,whic

Question 5

A scientist studying bacteria that lives in streams happens upon several species that display resistance to two different antibiotics.This is surprising because these bacteria cannot live in humans or any other mammal.Looking around,the scientist notices the presence of a cattle farm in the distance.Could this cattle farm be a possible explanation for the observation of antibiotic resistance in these bacteria? Why or why not?

Accepted Answer

Yes,the cattle farm is quite likely the

Question 6

Which of these bacteria (A-E)are LEAST fit in a forest situation? Explain.(Note: More than one bacterium may be correct.)

Accepted Answer

A,B,and E have an equally low

Question 7

Each bacteria cell typically splits into ____ new cells.

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  8 
E)  20 
A)  2 
B)  3 
C)  4 
D)  8 
E)  20

Question 8

After bacterial asexual reproduction,the daughter cells produced

Accepted Answer

A)  are identical to each other. 
B)  have half the chromosome number. 
C)  are genetically different. 
D)  have double the DNA content. 
E)  exchange genes by transformation 
A)  are identical to each other. 
B)  have half the chromosome number. 
C)  are genetically different. 
D)  have double the DNA content. 
E)  exchange genes by transformation

Question 9

Which of the following have contributed to the emergence of drug-resistant bacteria?

Accepted Answer

A)  prescribing antibiotics for colds 
B)  prescribing antibiotics for bacterial infections 
C)  failure of hospital personnel to wash hands 
D)  giving livestock antibiotics 
E)  All of the above. 
A)  prescribing antibiotics for colds 
B)  prescribing antibiotics for bacterial infections 
C)  failure of hospital personnel to wash hands 
D)  giving livestock antibiotics 
E)  All of the above.

Question 10

Natural selection that favors survival of extreme phenotypes of a population is called

Accepted Answer

A)  artificial selection. 
B)  stabilizing selection. 
C)  diversifying selection. 
D)  directional selection. 
E)  extremophenotypic selection. 
A)  artificial selection. 
B)  stabilizing selection. 
C)  diversifying selection. 
D)  directional selection. 
E)  extremophenotypic selection.

Question 11

What is the drug of choice when a patient has a severe drug-resistant infection?

Accepted Answer

A)  penicillin 
B)  methicillin 
C)  vancomycin 
D)  cephalexin 
E)  amoxicillin 
A)  penicillin 
B)  methicillin 
C)  vancomycin 
D)  cephalexin 
E)  amoxicillin

Question 12

If bacterial cells can divide every 20 minutes,how many bacteria will be present after 2 hours if the starting population is 100 cells?

Accepted Answer

A)  700 
B)  1200 
C)  1300 
D)  3200 
E)  6400 
A)  700 
B)  1200 
C)  1300 
D)  3200 
E)  6400

Question 13

What is gene transfer?

Accepted Answer

Gene transfer is bac

Question 14

MRSA should routinely be treated with

Accepted Answer

A)  penicillin. 
B)  a ß-lactam antibiotic. 
C)  cephalosporin. 
D)  vancomycin. 
E)  cephalexin. 
A)  penicillin. 
B)  a ß-lactam antibiotic. 
C)  cephalosporin. 
D)  vancomycin. 
E)  cephalexin.

Question 15

MRSA is resistant to

Accepted Answer

A)  penicillin. 
B)  ß-lactam antibiotics. 
C)  cephalosporin. 
D)  methicillin. 
E)  All of the above. 
A)  penicillin. 
B)  ß-lactam antibiotics. 
C)  cephalosporin. 
D)  methicillin. 
E)  All of the above.

Question 16

Which has made the biggest impact on future generations?

Accepted Answer

A)  a 5000-year-old bristlecone pine tree that produced 1 offspring every 100 years 
B)  a 5000-year-old bristlecone pine tree that produced 3 offspring every 100 years 
C)  a 3000-year-old bristlecone pine tree that produced 100 offspring every 100 years 
D)  a 2000-year-old bristlecone pine tree that produced 100 offspring every 10 years 
E)  a 500-year-old bristlecone pine tree that produced 100 offspring every year 
A)  a 5000-year-old bristlecone pine tree that produced 1 offspring every 100 years 
B)  a 5000-year-old bristlecone pine tree that produced 3 offspring every 100 years 
C)  a 3000-year-old bristlecone pine tree that produced 100 offspring every 100 years 
D)  a 2000-year-old bristlecone pine tree that produced 100 offspring every 10 years 
E)  a 500-year-old bristlecone pine tree that produced 100 offspring every year

Question 17

Which bacterial phenotype would have the highest fitness if it were cultured in a medium containing antibiotics?

Accepted Answer

A)  a slightly antibiotic-resistant variant 
B)  a moderately antibiotic-resistant variant 
C)  a highly antibiotic-resistant variant 
D)  an antibiotic-sensitive variant 
E)  all phenotypes have equal fitness 
A)  a slightly antibiotic-resistant variant 
B)  a moderately antibiotic-resistant variant 
C)  a highly antibiotic-resistant variant 
D)  an antibiotic-sensitive variant 
E)  all phenotypes have equal fitness

Question 18

Natural selection that favors survival of an intermediate phenotype of a population is called

Accepted Answer

A)  artificial selection. 
B)  diversifying selection. 
C)  directional selection. 
D)  stabilizing selection. 
E)  mediophenotypic selection. 
A)  artificial selection. 
B)  diversifying selection. 
C)  directional selection. 
D)  stabilizing selection. 
E)  mediophenotypic selection.

Question 19

A highly resistant antibiotic strain of S.aureus would reproduce best in

Accepted Answer

A)  the presence of antibiotic. 
B)  the absence of antibiotic. 
C)  the presence or absence of antibiotic. 
D)  a moderate concentration of antibiotic. 
E)  a fluctuating concentration of antibiotic 
A)  the presence of antibiotic. 
B)  the absence of antibiotic. 
C)  the presence or absence of antibiotic. 
D)  a moderate concentration of antibiotic. 
E)  a fluctuating concentration of antibiotic

Question 20

All of the following are true of MRSA,EXCEPT

Accepted Answer

A)  MRSA used to be confined to hospitals but now is showing up in healthy individuals outside hospitals. 
B)  some strains may be resistant to multiple antibiotics. 
C)  anyone who comes in contact with MRSA will become sick. 
D)  MRSA can secrete toxins. 
E)  it can be acquired through inhalation. 
A)  MRSA used to be confined to hospitals but now is showing up in healthy individuals outside hospitals. 
B)  some strains may be resistant to multiple antibiotics. 
C)  anyone who comes in contact with MRSA will become sick. 
D)  MRSA can secrete toxins. 
E)  it can be acquired through inhalation.

Exam 14: Natural Selection and Adaptation Bugs That Resist Drugs

Strains of pneumonia-causing ______ are becoming resistant to every available antibiotic.

Which of the following is TRUE of bacterial reproduction?

A student who shares a dorm suite and bathroom with seven other students has contracted a skin infection caused by MRSA.Based on what you know about MRSA and about the student,where would you look first for the source of the bacteria?

What would the outcome be if a homogeneous (no variation)antibiotic-sensitive strain of S.aureus was grown in the presence of antibiotics? Why?

Which of these bacteria (A-E)are LEAST fit in a forest situation? Explain.(Note: More than one bacterium may be correct.)

Each bacteria cell typically splits into ____ new cells.

After bacterial asexual reproduction,the daughter cells produced

Which of the following have contributed to the emergence of drug-resistant bacteria?

Natural selection that favors survival of extreme phenotypes of a population is called

What is the drug of choice when a patient has a severe drug-resistant infection?

If bacterial cells can divide every 20 minutes,how many bacteria will be present after 2 hours if the starting population is 100 cells?

What is gene transfer?

MRSA should routinely be treated with

MRSA is resistant to

Which has made the biggest impact on future generations?

Which bacterial phenotype would have the highest fitness if it were cultured in a medium containing antibiotics?

Natural selection that favors survival of an intermediate phenotype of a population is called

A highly resistant antibiotic strain of S.aureus would reproduce best in

All of the following are true of MRSA,EXCEPT

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

DNA Structure and Replication Biologically Unique

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Single-Gene Inheritance and Meiosis Rock for a Cause

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

A: Nonadaptive Evolution and Speciation Urban Evolution

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Life on Earth Qa: Evolution

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

B: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

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