Question 1

__________ showed that amino acids can polymerize abiotically when exposed to dry heat.

Accepted Answer

A)  I. Oparin
B)   Stanley Miller
C)   Sidney Fox
D)   Graham Cairns-SmithE) All of the above
F) C) and D)

Question 2

In addition to his work with bacteria,Louis Pasteur was also the one to name viruses.His work with rabies produced what breakthrough?

Accepted Answer

A)   He was the first to discover that viruses could be based on RNA rather than DNA.
B)   He developed a vaccine that he used on a young rabies patient.
C)   He was the first to see a virus under a microscope.
D)   He was the first to determine the life cycle of a virus.
E)   He invented the microscope.F) B) and E)
G) B) and C)

Question 3

Which statement is NOT true about cyanobacteria?

Accepted Answer

A)   They were formerly called blue-green algae.
B)   They release sulfur during photosynthesis.
C)   They can combine with fungi to form lichens.
D)   They are eukaryotic like fungi.
E)   They can colonize rocks.F) A) and B)
G) D) and E)

Question 4

Which statement is true about bacteria?

Accepted Answer

A)   They contain a nucleus.
B)   They lack ribosomes.
C)   They usually lack a cell wall.
D)   They divide sexually.
E)   They contain a single, circular DNA molecule as the genetic material.F) A) and B)
G) A) and C)

Question 5

Microbiology is the study of microbes,these include all but which of the following?

Accepted Answer

A)   Archae
B)   Protists
C)   Viroids
D)   Plants
E)   FungiF) C) and E)
G) D) and E)

Question 6

Although microbes are often equated with pathogens not all are pathogenic and some help humans maintain their health.Which of the following are produced by bacteria that live in the human intestine?

Accepted Answer

A)   Folic acid and vitamin B12
B)   Insulin and vitamin K
C)   Lipids and folic acid
D)   Vitamin K and lipids
E)   Vitamins K and B12F) A) and B)
G) B) and E)

Question 7

Which of the following associations is correct?

Accepted Answer

A)   herpesvirus - chicken pox
B)   Streptococcus pyogenes - measles
C)   trypanosome - Chlamydia
D)   mycoses - Entamoeba
E)   tinea - fungiF) A) and B)
G) A) and C)

Question 8

Bacteria cause diseases in humans when they

Accepted Answer

A)   Carry genes that code for specific virulence factors that determine the type and extent of the illness.
B)   Carry the same genes as the host organism causing them to be indistinguishable from the host cell.
C)   Carry the genes of viruses causing them to be more harmful to humans.
D)   Carry the genes of organisms like birds (bird flu)  or pigs (swine flu) .
E)   Carry genes that allow them to become symbiotes.F) B) and C)
G) None of the above

Question 9

Which statement is NOT true about a protocell?

Accepted Answer

A)   It would have contained DNA as its genetic material.
B)   It would have been present before the development of a true cell.
C)   It would have had a lipid and protein membrane surrounding it.
D)   It would have contained a biochemical pathway for energy metabolism.
E)   It might have been like a coacervate droplet in which a semipermeable boundary allows some materials to be absorbed from the surrounding environment.F) B) and D)
G) C) and D)

Question 10

In order to infect a cell,a virus must

Accepted Answer

A)   inject its protein into the cell while the nucleic acid remains attached to the host cell surface.
B)   have a special protein on its surface capsid that can interact with a protein on the surface of the host cell.
C)   actively burrow through the cell wall or cell membrane of the host cell to reach the cell's nucleus.
D)   produce a special extension of its cytoplasm when it comes into contact with the appropriate host cell.
E)   have enzymes to break down the cell wall or cell membrane of the host cell.F) A) and B)
G) C) and D)

Question 11

Which group does NOT have members that cause human disease?

Accepted Answer

A)   archaea
B)   bacteria
C)   fungi
D)   prions
E)   virusesF) A) and B)
G) A) and E)

Question 12

Which type of nutrition is believed to have come first?

Accepted Answer

A)   autotrophic
B)   heterotrophic
C)   aerobic
D)   photosynthetic
E)   catalyticF) D) and E)
G) B) and C)

Question 13

Influenza strains that sweep around the world often carry names such as Shanghai H1N1 or Mexico City H2N2.The viruses vary in H and N surface spikes because

Accepted Answer

A)   the viruses reproduce on their own and attack people in cities more often.
B)   these viruses emerged as stray DNA from the genomes of people in these cities.
C)   this is where the antibodies of immune people began to break down and the old virus was again virulent.
D)   infected people develop immunity to the present strain, and strains that mutate sufficiently to be outside the range of immunity are soon spread in highly populated areas.
E)   the H and N surface spikes are obtained from the human hosts.F) D) and E)
G) B) and D)

Question 14

The capsid of a virus is composed of

Accepted Answer

A)   RNA.
B)   protein.
C)   DNA.
D)   cellulose.
E)   lipid.F) A) and B)
G) B) and D)

Question 15

List the four stages that are thought to have led to the formation of the first cells.

Accepted Answer

Stage 1: Organic monomers evolved from i...

Question 16

When an enveloped animal virus enters a cell,then

Accepted Answer

A)   the next thing it does is assemble a new virus.
B)   the envelope is removed after the virus is inside the cell's nucleus.
C)   the protein capsid is removed through uncoating to expose the viral genome.
D)   it immediately integrates its nucleic acid genome into the host chromosomes.
E)   its cycle always results in the death of the animal cell.F) A) and D)
G) D) and E)

Question 17

In a liquid environment,____ molecules will automatically form droplets called liposomes.

Accepted Answer

A)   amino acid
B)   protein
C)   glucose
D)   phospholipid
E)   nucleic acidF) C) and D)
G) All of the above

Question 18

Metabolically,the archaea are

Accepted Answer

A)   photosynthetic.
B)   not metabolically active.
C)   heterotrophic and some are autotrophic as well.
D)   parasitic.
E)   all autotrophs.F) A) and B)
G) B) and D)

Question 19

Which of these would have been most likely to develop only after the formation of a true cell?

Accepted Answer

A)   autotroph
B)   heterotroph
C)   protocell
D)   microsphere
E)   proteinoidF) A) and C)
G) B) and E)

Question 20

Considering the various theories,the energy used in forming organic molecules in the primitive atmosphere could have come from all EXCEPT

Accepted Answer

A)   lightning.
B)   ultraviolet radiation.
C)   heat from volcanoes.
D)   electric spark.
E)   sound.F) B) and E)
G) A) and D)

Exam 28: Microbiology

List the four stages that are thought to have led to the formation of the first cells.

Correct AnswerverifiedStage 1: Organic monomers evolved from i...View AnswerShow Answer

Which of these would have been most likely to develop only after the formation of a true cell?

Correct AnswerverifiedShow Answer

When an enveloped animal virus enters a cell,then

Correct AnswerverifiedShow Answer

In a liquid environment,____ molecules will automatically form droplets called liposomes.

Correct AnswerverifiedShow Answer

Bacteria cause diseases in humans when they

Correct AnswerverifiedShow Answer

__________ showed that amino acids can polymerize abiotically when exposed to dry heat.

Correct AnswerverifiedShow Answer

Which statement is NOT true about cyanobacteria?

Correct AnswerverifiedShow Answer

Although microbes are often equated with pathogens not all are pathogenic and some help humans maintain their health.Which of the following are produced by bacteria that live in the human intestine?

Correct AnswerverifiedShow Answer

Which type of nutrition is believed to have come first?

Correct AnswerverifiedShow Answer

Influenza strains that sweep around the world often carry names such as Shanghai H1N1 or Mexico City H2N2.The viruses vary in H and N surface spikes because

Correct AnswerverifiedShow Answer

In order to infect a cell,a virus must

Correct AnswerverifiedShow Answer

Which group does NOT have members that cause human disease?

Correct AnswerverifiedShow Answer

Metabolically,the archaea are

Correct AnswerverifiedShow Answer

Which statement is NOT true about a protocell?

Correct AnswerverifiedShow Answer

Considering the various theories,the energy used in forming organic molecules in the primitive atmosphere could have come from all EXCEPT

Correct AnswerverifiedShow Answer

In addition to his work with bacteria,Louis Pasteur was also the one to name viruses.His work with rabies produced what breakthrough?

Correct AnswerverifiedShow Answer

Which of the following associations is correct?

Correct AnswerverifiedShow Answer

Microbiology is the study of microbes,these include all but which of the following?

Correct AnswerverifiedShow Answer

Which statement is true about bacteria?

Correct AnswerverifiedShow Answer

The capsid of a virus is composed of

Correct AnswerverifiedShow Answer

Correct Answer
verified
Stage 1: Organic monomers evolved from i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Influenza strains that sweep around the world often carry names such as Shanghai H₁N₁ or Mexico City H₂N₂.The viruses vary in H and N surface spikes because

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified