Question 1

Why is chlamydia much more common than syphilis?

Accepted Answer

A) Chlamydia is spread via droplet inhalation. 
B) Syphilis can penetrate a condom whereas chlamydia cannot. 
C) Many chlamydia infections are asymptomatic. 
D) Chlamydia is viral,and viral diseases spread much quicker. 
E) Chlamydia is resistant to most antibiotics. 
A) Chlamydia is spread via droplet inhalation. 
B) Syphilis can penetrate a condom whereas chlamydia cannot. 
C) Many chlamydia infections are asymptomatic. 
D) Chlamydia is viral,and viral diseases spread much quicker. 
E) Chlamydia is resistant to most antibiotics.

Question 2

Prokaryotes undergo a process that produces cells that are identical.This process is called

Accepted Answer

A) mitosis. 
B) meiosis. 
C) conjugation. 
D) binary fission. 
E) syngamy. 
A) mitosis. 
B) meiosis. 
C) conjugation. 
D) binary fission. 
E) syngamy.

Question 3

Early classification systems of the bacteria employed all of the following characteristics except

Accepted Answer

A) the ability to photosynthesize. 
B) rRNA sequences. 
C) motility. 
D) colony or filament forming. 
E) sporulation or binary fission. 
A) the ability to photosynthesize. 
B) rRNA sequences. 
C) motility. 
D) colony or filament forming. 
E) sporulation or binary fission.

Question 4

Carbon fixation carried out by the prokaryotes known as the ________ involves chlorophyll a.

Accepted Answer

The answer of Carbon fixation carried out by the prokaryotes...

Question 5

Which of the following statements about Hfr cells and bacterial conjugation is false?

Accepted Answer

A) An Hfr cell becomes an F- cell if its integrated F plasmid is excised. 
B) If excision of the F plasmid from an Hfr cell includes some bacterial genes,a partial diploid can result. 
C) The genes that are transferred from an Hfr cell into a recipient cell during conjugation replace the equivalent genes in the recipient cell. 
D) An F' plasmid contains some bacterial genes. 
E) Cells with integrated F' plasmid have two copies of some genes. 
A) An Hfr cell becomes an F- cell if its integrated F plasmid is excised. 
B) If excision of the F plasmid from an Hfr cell includes some bacterial genes,a partial diploid can result. 
C) The genes that are transferred from an Hfr cell into a recipient cell during conjugation replace the equivalent genes in the recipient cell. 
D) An F' plasmid contains some bacterial genes. 
E) Cells with integrated F' plasmid have two copies of some genes.

Question 6

Some prokaryotes attach to other substrates by hairlike outgrowths,which are shorter than flagella.These are called

Accepted Answer

A) endospores. 
B) flagellin. 
C) pili. 
D) plasmids. 
E) fission products. 
A) endospores. 
B) flagellin. 
C) pili. 
D) plasmids. 
E) fission products.

Question 7

Bacteria typically use binary fission,but under special circumstances sexual reproduction is possible via horizontal gene transfer.

Accepted Answer

A) True 
 B)False

Question 8

The data below shows recombination of genes (1-5)according to the amount of time available for transfer of the bacterial chromosome during conjugation between different genetic strains in E coli.Based on these data,which gene is closest to gene 1? (Note: The entire chromosome is transferred in 100 minutes.)

Accepted Answer

A) gene 2 
B) gene 3 
C) gene 4 
D) gene 5 
A) gene 2 
B) gene 3 
C) gene 4 
D) gene 5

Question 9

Bacteria cause all of the following human diseases except

Accepted Answer

A) cholera. 
B) diphtheria. 
C) tuberculosis. 
D) tetanus. 
E) malaria. 
A) cholera. 
B) diphtheria. 
C) tuberculosis. 
D) tetanus. 
E) malaria.

Question 10

Which of the following is not a shape seen in prokaryotes?

Accepted Answer

A) Spheres 
B) Rods 
C) Spirals 
D) Icosahedrals 
A) Spheres 
B) Rods 
C) Spirals 
D) Icosahedrals

Question 11

The prokaryotic DNA is located in the

Accepted Answer

A) capsid region. 
B) nucleoid region. 
C) endospore region. 
D) peptidoglycan region. 
E) pili region. 
A) capsid region. 
B) nucleoid region. 
C) endospore region. 
D) peptidoglycan region. 
E) pili region.

Question 12

Certain prokaryotes can withstand drying and hotter temperatures because of their ability to form

Accepted Answer

A) cell walls. 
B) endospores. 
C) flagella. 
D) organelles. 
E) plasmids. 
A) cell walls. 
B) endospores. 
C) flagella. 
D) organelles. 
E) plasmids.

Question 13

Prokaryotes split into two lines early in the history of life.The differences are so fundamental that they are assigned to two different domains,the ________ and the Bacteria.

Accepted Answer

The answer of Prokaryotes split into two lines early in...

Question 14

Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except

Accepted Answer

A) they act as sites of protein synthesis. 
B) they are smaller than in eukaryotes. 
C) tetracycline and chloramphenicol can bind to bacterial ribosomes. 
D) they differ in ribosomal proteins. 
E) they differ in RNA content. 
A) they act as sites of protein synthesis. 
B) they are smaller than in eukaryotes. 
C) tetracycline and chloramphenicol can bind to bacterial ribosomes. 
D) they differ in ribosomal proteins. 
E) they differ in RNA content.

Question 15

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product.This organism can best be classified as a

Accepted Answer

A) chemolithoautotroph. 
B) chemoheterotroph. 
C) photoautotroph. 
D) photoheterotroph. 
E) pathogen. 
A) chemolithoautotroph. 
B) chemoheterotroph. 
C) photoautotroph. 
D) photoheterotroph. 
E) pathogen.

Question 16

Vibrio cholerae produces a toxin that destroys the intestinal epithelium.This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans.What is this relationship?

Accepted Answer

A) Mutualistic 
B) Commensalistic 
C) Symbiotic 
D) Atavistic 
A) Mutualistic 
B) Commensalistic 
C) Symbiotic 
D) Atavistic

Question 17

Which of the following statements about sexually transmitted diseases (STDs)is false?

Accepted Answer

A) Gonorrhea,syphilis,and chlamydia are all transmitted through sexual contact. 
B) Because chlamydia has both bacterial and viral characteristics,it cannot be treated with antibiotics. 
C) Chlamydia is known as the "silent STD." 
D) The incidence of chlamydia has increased as gonorrhea has decreased. 
E) Syphilis can be transmitted from a mother to her fetus. 
A) Gonorrhea,syphilis,and chlamydia are all transmitted through sexual contact. 
B) Because chlamydia has both bacterial and viral characteristics,it cannot be treated with antibiotics. 
C) Chlamydia is known as the "silent STD." 
D) The incidence of chlamydia has increased as gonorrhea has decreased. 
E) Syphilis can be transmitted from a mother to her fetus.

Question 18

Why are children often told that if they eat too much candy their teeth will fall out?

Accepted Answer

A) Sugar attacks tooth enamel. 
B) Sugars gradually replace the tooth enamel. 
C) Bacteria use the sugar to make ATP.This fermentation process produces acids as a by-product. 
D) Bacteria secrete acids in order to digest the sugar molecules. 
A) Sugar attacks tooth enamel. 
B) Sugars gradually replace the tooth enamel. 
C) Bacteria use the sugar to make ATP.This fermentation process produces acids as a by-product. 
D) Bacteria secrete acids in order to digest the sugar molecules.

Question 19

Tuberculosis remains a serious worldwide health problem due to all of the following except

Accepted Answer

A) multi-drug resistance. 
B) social factors such as crowding and incarceration. 
C) the prevalence of HIV infections. 
D) ease of transmission. 
E) absence of MDR strains. 
A) multi-drug resistance. 
B) social factors such as crowding and incarceration. 
C) the prevalence of HIV infections. 
D) ease of transmission. 
E) absence of MDR strains.

Question 20

Current classification of prokaryotes is based on

Accepted Answer

A) morphology of flagella. 
B) sequencing of proteins,DNA,and RNA. 
C) occurrence of transverse binary fission. 
D) type of colony formation. 
E) ability to stain the cell wall with Gram stain. 
A) morphology of flagella. 
B) sequencing of proteins,DNA,and RNA. 
C) occurrence of transverse binary fission. 
D) type of colony formation. 
E) ability to stain the cell wall with Gram stain.

Exam 27: Prokaryotes

Why is chlamydia much more common than syphilis?

Prokaryotes undergo a process that produces cells that are identical.This process is called

Early classification systems of the bacteria employed all of the following characteristics except

Carbon fixation carried out by the prokaryotes known as the ________ involves chlorophyll a.

Which of the following statements about Hfr cells and bacterial conjugation is false?

Some prokaryotes attach to other substrates by hairlike outgrowths,which are shorter than flagella.These are called

Bacteria typically use binary fission,but under special circumstances sexual reproduction is possible via horizontal gene transfer.

Bacteria cause all of the following human diseases except

Which of the following is not a shape seen in prokaryotes?

The prokaryotic DNA is located in the

Certain prokaryotes can withstand drying and hotter temperatures because of their ability to form

Prokaryotes split into two lines early in the history of life.The differences are so fundamental that they are assigned to two different domains,the ________ and the Bacteria.

Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product.This organism can best be classified as a

Vibrio cholerae produces a toxin that destroys the intestinal epithelium.This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans.What is this relationship?

Which of the following statements about sexually transmitted diseases (STDs)is false?

Why are children often told that if they eat too much candy their teeth will fall out?

Tuberculosis remains a serious worldwide health problem due to all of the following except

Current classification of prokaryotes is based on

The Science of Biology

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The Chemical Building Blocks of Life

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Photosynthesis

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