Micro Final

40 Questions  I  By Jgarza_stc4
Please take the quiz to rate it.

 Micro Final

  
Changes are done, please start the quiz.


Questions and Answers

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
  • 1. 
    From the assigned reading in Todar’s online book of Bacteriology, microbes impact human lives and the environment in many ways however, the most significant impact of microorganisms on earth is the ability to recycle the primary elements found in all living things. These primary elements are oxygen, as well as _______ and __________.
    • A. 

      Sulfur

    • B. 

      Nitrogen

    • C. 

      Oxygen

    • D. 

      Carbon

    • E. 

      B and D


  • 2. 
    Primary producers are those microorganisms (such as cyanobacteria) that through photosynthesis take in _____ out of the atmosphere and convert it to organic (cellular) material, and as a result of carbon fixation reactions release _____ into the atmosphere.
    • A. 

      CO

    • B. 

      CO2

    • C. 

      CH4

    • D. 

      O2

    • E. 

      B and D


  • 3. 
    Nitrogen gas (N2) in the atmosphere is not in a usable form for plants on earth, the nitrogen gas must be converted to the usable form of ammonia (NH3) by microorganisms living free and in symbiotic relationships with plants. This process is called _______________
    • A. 

      Sulfur fixation

    • B. 

      Carbon fixation

    • C. 

      Nitrogen fixation

    • D. 

      None of the above


  • 4. 
    Which of the following pairs is mismatched?  
    • A. 

      Ehrlich - Chemotherapy

    • B. 

      Koch - Aseptic Surgery

    • C. 

      Pasteur - Proof of biogenesis

    • D. 

      Jenner- Vaccination


  • 5. 
    Which of the following is a scientific name?
    • A. 

      IGAS

    • B. 

      Flesh eating bacteria

    • C. 

      Group A streptococcus

    • D. 

      Streptococcus pyogenes

    • E. 

      Streptococci


  • 6. 
    Which of the following is NOT a domain in the three-domain system?
    • A. 

      Animalia

    • B. 

      Archaea

    • C. 

      Bacteria

    • D. 

      Eukarya


  • 7. 
    Which of the following statements about fungi is true?
    • A. 

      All are prokaryotic

    • B. 

      All are multicellular

    • C. 

      All require organic material for growth

    • D. 

      All grow using sunlight and carbon dioxide

    • E. 

      All are plants


  • 8. 
    Which of the following statements about protozoa is false?
    • A. 

      They have rigid cell walls

    • B. 

      They are classified by their method of locomotion

    • C. 

      All are unicellular

    • D. 

      All have complex cells

    • E. 

      All are eukaryotic


  • 9. 
    Which of the following statements about viruses is false?
    • A. 

      Acellular

    • B. 

      Does not metabolize nutrients

    • C. 

      Use host cell metabolic machinery to reproduce genome

    • D. 

      Viruses have both DNA and RNA together as the genetic material

    • E. 

      Viruses are parasitic


  • 10. 
    Microbes are important in maintaining Earth’s ecological balance as well as
    • A. 

      Maintaining good health in bacteria

    • B. 

      Maintaining good health in humans and animals

    • C. 

      Used to produce food and chemicals that are utilized by humans

    • D. 

      Cause disease as a result of colonization

    • E. 

      B, C, and D


  • 11. 
    Which of the following compounds is NOT an enzyme? 
    • A. 

      Dehydrogenase

    • B. 

      Cellulase

    • C. 

      Coenzyme A

    • D. 

      B-galactosidase

    • E. 

      Sucrase


  • 12. 
    Which organism is NOT correctly matched to its energy source? 
    • A. 

      Photoheterotroph - Light

    • B. 

      Photoautotroph - CO2

    • C. 

      Chemoautotroph - Fe2+

    • D. 

      Chemoheterotroph - Glucose

    • E. 

      Chemoautotroph - NH3


  • 13. 
    Which of the following statements about anaerobic respiration is false? 
    • A. 

      It involves glycolysis only

    • B. 

      It involves the Krebs cycle.

    • C. 

      It involves the reduction of nitrate.

    • D. 

      It generates ATP.

    • E. 

      It requires cytochromes.


  • 14. 

        What type of reaction is in Figure 5.2?
    • A. 

      Decarboxylation

    • B. 

      Transamination

    • C. 

      Dehydrogenation

    • D. 

      Oxidation

    • E. 

      Reduction


  • 15. 
    What is the fate of pyruvic acid in an organism that uses aerobic respiration? 
    • A. 

      It is reduced to lactic acid.

    • B. 

      It is oxidized in the Krebs cycle

    • C. 

      It is oxidized in the electron transport chain.

    • D. 

      It is catabolized in glycolysis.

    • E. 

      It is reduced in the Krebs cycle.


  • 16. 

    How would a noncompetitive inhibitor interfere with a reaction involving the enzyme shown in Figure 5.3? 
    • A. 

      It would bind to a.

    • B. 

      It would bind to b.

    • C. 

      It would bind to c.

    • D. 

      It would bind to d.

    • E. 

      Can't tell


  • 17. 

    How is ATP generated in the reaction shown in Figure 5.4? 
    • A. 

      Glycolysis

    • B. 

      Fermentation

    • C. 

      Photophosphorylation

    • D. 

      Oxidative phosphorylation

    • E. 

      Substrate-level phosphoorylation


  • 18. 
    Which of the following is the best definition of oxidative phosphorylation? 
    • A. 

      Electrons are passed through a series of carriers to O2.

    • B. 

      The energy released as carrier molecules are oxidized is used to generate ATP

    • C. 

      The energy released in the reduction of carrier molecules is used to generate ATP.

    • D. 

      The transfer of a high-energy phosphate group to ADP.


  • 19. 
    Which of the following statements about substrate-level phosphorylation is false? 
    • A. 

      It involves the direct transfer of a high-energy phosphate group from an intermediate metabolic compound to ADP.

    • B. 

      No final electron acceptor is required.

    • C. 

      It occurs in glycolysis.

    • D. 

      The oxidation of intermediate metabolic compounds releases energy that is used to generate ATP.

    • E. 

      It occurs in the Krebs cycle.


  • 20. 
    Which of the following statements about photophosphorylation is false? 
    • A. 

      Light liberates an electron from chlorophyll.

    • B. 

      The oxidation of carrier molecules releases energy.

    • C. 

      Energy from oxidation reactions is used to generate ATP from ADP.

    • D. 

      It requires CO2.

    • E. 

      It occurs in photosynthesizing cells.


  • 21. 
    A gene is best defined as
    • A. 

      A segment of DNA.

    • B. 

      Three nucleotides that code for an amino acid.

    • C. 

      A sequence of nucleotides in DNA that codes for a fuctional product

    • D. 

      A sequence of nucleotides in RNA that codes for a functional product.

    • E. 

      A transcribed unit of DNA.


  • 22. 
    Which of the following pairs is mismatched?
    • A. 

      DNA polymerase – makes a molecule of DNA from a DNA template

    • B. 

      RNA polymerase – makes a molecule of RNA from an RNA template

    • C. 

      DNA ligase – joins segments of DNA

    • D. 

      Transposase – insertion of DNA segments into DNA

    • E. 

      DNA gyrase – coils and twists DNA


  • 23. 
    Which of the following statements is false?
    • A. 

      DNA polymerase joins nucleotides in one direction only.

    • B. 

      The leading strand of DNA is made continuously.

    • C. 

      The lagging strand of DNA is started by an RNA primer.

    • D. 

      DNA replication proceeds in one direction around the bacterial chromosome.

    • E. 

      Multiple replication forks are possible on a bacterial chromosome.


  • 24. 
    DNA is constructed of
    • A. 

      A single strand of nucleotides with internal hydrogen bonding.

    • B. 

      Nucleotides bonded A–C and G–T.

    • C. 

      Two strands of nucleotides running antiparallel.

    • D. 

      Two strands of identical nucleotides with hydrogen bonds between them.


  • 25. 
    Which of the following is NOT a product of transcription?
    • A. 

      A new strand of DNA

    • B. 

      RRNA

    • C. 

      TRNA

    • D. 

      MRNA

    • E. 

      None of the above


  • 26. 
    Which of the following statements about bacteriocins is false?
    • A. 

      The genes coding for them are on plasmids.

    • B. 

      They cause food-poisoning symptoms.

    • C. 

      Nisin is a bacteriocin used as a food preservative.

    • D. 

      They can be used to identify certain bacteria.

    • E. 

      Bacteriocins kill baceria.


  • 27. 

    In Figure 8.1, which colonies are streptomycin-resistant and leucine-requiring?
    • A. 

      1, 2, 3, and 9

    • B. 

      3 and 9

    • C. 

      4, 6, and 8

    • D. 

      4 and 8

    • E. 

      5 and 6


  • 28. 
    Table 8.1   Culture 1:  F+, leucine+, histidine+ Culture 2:  F-, leucine-, histidine- In Table 8.1, what will be the result of conjugation between cultures 1 and 2?
    • A. 

      1 will remain the same; 2 will become F+, leucine-, histidine-

    • B. 

      1 will become F-, leu+, his+; 2 will become F+, leu-, his-

    • C. 

      1 will become F-, leu-, his-; 2 will remain the same

    • D. 

      1 will remain the same; 2 will become F+, leu+, his+

    • E. 

      1 will remain the same; 2 will become F+ and recombination may occur


  • 29. 
    In Table 8.1, if culture 1 mutates to Hfr, what will be the result of conjugation between the two cultures?
    • A. 

      They will both remain the same

    • B. 

      1 will become F+, leu+, his+; 2 will become F+, leu+, his+

    • C. 

      1 will remain the same; Recombination will occur in 2

    • D. 

      1 will become F-, leu+, his+; 2 will become Hfr, leu+, his+

    • E. 

      Can't tell


  • 30. 
    An enzyme produced in response to the presence of a substrate is called
    • A. 

      An inducible enzyme.

    • B. 

      A repressible enzyme.

    • C. 

      A restriction enzyme.

    • D. 

      An operator.

    • E. 

      A promoter.


  • 31. 
    In which of the following ways do viruses differ from bacteria?
    • A. 

      Viruses are filterable.

    • B. 

      Viruses are obligate intracellular parasites.

    • C. 

      Viruses don't have any nucleic acid.

    • D. 

      Viruses are not composed of cells.

    • E. 

      Viruses don't reproduce.


  • 32. 
    Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?
    • A. 

      They are not composed of cells.

    • B. 

      They are filterable.

    • C. 

      They cannot reproduce themselves outside a host.

    • D. 

      They cause diseases similar to those caused by chemicals.

    • E. 

      They are chemically simple.


  • 33. 
    Which of the following statements about spikes is false?
    • A. 

      They are used for penetration.

    • B. 

      They are used for absorption.

    • C. 

      They may cause hemagglutination.

    • D. 

      They are found only on enveloped viruses.

    • E. 

      They are found only on nonenveloped viruses.


  • 34. 
    Which of the following is NOT used as a criterion to classify viruses?
    • A. 

      Biochemical tests

    • B. 

      Morphology

    • C. 

      Nucleic acid

    • D. 

      Size

    • E. 

      Number of capsomeres


  • 35. 
    Which of the following is NOT a method of culturing viruses?
    • A. 

      In laboratory animals

    • B. 

      In culture media

    • C. 

      In embryonated eggs

    • D. 

      In cell culture

    • E. 

      None of the above


  • 36. 
    Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?
    • A. 

      Adsorption

    • B. 

      Penetration

    • C. 

      Uncoating

    • D. 

      Biosynthesis

    • E. 

      Release


  • 37. 
    The definition of lysogeny is
    • A. 

      Phage DNA is incorporated into host cell DNA.

    • B. 

      Lysis of the host cell due to a phage.

    • C. 

      The period during replication when virions are not present.

    • D. 

      When the burst time takes an unusually long time.

    • E. 

      Attachment of a phage to a cell.


  • 38. 
    A viroid is
    • A. 

      A complete, infectious virus particle.

    • B. 

      A nonenveloped, infectious piece of RNA.

    • C. 

      A capsid without a nucleic acid.

    • D. 

      A provirus.

    • E. 

      An infectious protein.


  • 39. 

    In Figure 13.1, which structure is a complex virus?  
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      All of the above


  • 40. 
    In Figure 13.1, the structures illustrated are composed of
    • A. 

      DNA

    • B. 

      RNA

    • C. 

      DNA or RNA

    • D. 

      Capsomeres

    • E. 

      Capsids


Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz
We have sent an email with your new password.