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Exam 3 Practice Questions - Biology of Microorganisms - Spring 2012 | BIOL 305, Exams of Biology

George Mason University (GMU)Biology
Prof. Charles Madden

Material Type: Exam; Professor: Madden; Class: Biology of Microorganisms; Subject: Biology; University: George Mason University;

Typology: Exams

2011/2012

Uploaded on 04/12/2012

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Biol 305, Spring 2012, Practice Exam 3
Choose the BEST answer to the following questions in 50 minutes or less
1) Regarding bacterial conjugation, which of the following is FALSE?
a) A recipient cell can become F+.
b) A donor cell can become F-.
c) A recipient cell can become Hfr.
d) A recipient cell can gain genetic information.
e) Direct cell to cell contact is required
2) Which statement concerning transposons is FALSE?
a) Transposons can carry DNA from one cell to another
b) An insertion sequence is the simplest type of transposon.
c) A complex transposon can carry genes from one chromosome to another.
d) A complex transposon can carry genes from a plasmid to a chromosome of a cell.
e) Much of the non-coding DNA contained in the human genome was derived from transposition events
3) Which of the following statements regarding DNA plasmids is/are TRUE?
a) They can carry genes for critical metabolic pathways
b) They can carry genes for antibiotic resistance
c) They replicate autonomously.
d) Answers B and C are correct
e) All of the above are correct
4) Which of the following statements regarding ribosomes is FALSE?
a) The ribosome of prokaryotes has four molecules of rRNA while eukaryotes have three.
b) The ribosome of prokaryotes is 70S in size.
c) Prokaryotes can be classified based on the sequence of their 16S rRNA.
d) The ribosome of eukaryotes is 80S in size
e) The rRNA sequences of Archaea are significantly different than those of Bacteria
5) If two organisms have similar rRNA sequences, you can conclude that
a) They live in the same place.
b) They evolved from a common ancestor.
c) They will have different G-C ratios.
d) They will both ferment lactose.
e) They mated with each other.
6) Serological testing is based on the fact that
a) All bacteria have the same antigens.
b) Antibodies react specifically with an antigen and different bacterial species express different antigens.
c) Only the human body makes antibodies against bacteria.
d) Antibodies cause the destruction of antigens.
e) Bacteria clump together when mixed with any antibodies and become visible to the naked eye.
7) Which of the following criteria is most useful in determining whether two organisms are related?
a) Both ferment lactose.
b) Both are gram-positive.
c) Both are motile.
d) Both are aerobic.
e) All are equally important.
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Download Exam 3 Practice Questions - Biology of Microorganisms - Spring 2012 | BIOL 305 and more Exams Biology in PDF only on Docsity!

Choose the BEST answer to the following questions in 50 minutes or less

  1. Regarding bacterial conjugation, which of the following is FALSE? a) A recipient cell can become F+. b) A donor cell can become F-. c) A recipient cell can become Hfr. d) A recipient cell can gain genetic information. e) Direct cell to cell contact is required
  2. Which statement concerning transposons is FALSE? a) Transposons can carry DNA from one cell to another b) An insertion sequence is the simplest type of transposon. c) A complex transposon can carry genes from one chromosome to another. d) A complex transposon can carry genes from a plasmid to a chromosome of a cell. e) Much of the non-coding DNA contained in the human genome was derived from transposition events
  3. Which of the following statements regarding DNA plasmids is/are TRUE? a) They can carry genes for critical metabolic pathways b) They can carry genes for antibiotic resistance c) They replicate autonomously. d) Answers B and C are correct e) All of the above are correct
  4. Which of the following statements regarding ribosomes is FALSE? a) The ribosome of prokaryotes has four molecules of rRNA while eukaryotes have three. b) The ribosome of prokaryotes is 70S in size. c) Prokaryotes can be classified based on the sequence of their 16S rRNA. d) The ribosome of eukaryotes is 80S in size e) The rRNA sequences of Archaea are significantly different than those of Bacteria
  5. If two organisms have similar rRNA sequences, you can conclude that a) They live in the same place. b) They evolved from a common ancestor. c) They will have different G-C ratios. d) They will both ferment lactose. e) They mated with each other.
  6. Serological testing is based on the fact that a) All bacteria have the same antigens. b) Antibodies react specifically with an antigen and different bacterial species express different antigens. c) Only the human body makes antibodies against bacteria. d) Antibodies cause the destruction of antigens. e) Bacteria clump together when mixed with any antibodies and become visible to the naked eye.
  7. Which of the following criteria is most useful in determining whether two organisms are related? a) Both ferment lactose. b) Both are gram-positive. c) Both are motile. d) Both are aerobic. e) All are equally important.
  1. Which genus IS NOT important for the nitrogen cycle? a) Caulobacter b) Rhizobium c) Azospirillum d) Nitrosomonas e) Nitrobacter
  2. The rickettsia and chlamydia have which in common? a) both can cause diseases in humans b) both are obligate intracellular parasites. c) both are part of the nitrogen cycle d) both are agriculturally important. e) answers A and B are both correct
  3. Which class of proteobacteria include agriculturally important organisms that may have unusual structures or prosthecae? The genera Azospirillum and Caulobacter are examples. a) alpha b) beta c) gamma d) delta e) epsilon
  4. You have a bacterial sexually transmitted infection that can contribute to pelvic inflammatory disease. What are you infected with? a) Streptococcus pyogenes b) Yersinia pestis c) Plasmodium vivax d) Chlamydia trachomatis e) Staphylococcus aereus
  5. Which of the following contains all the gram-negative, disease causing bacteria? a) Proteobacteria b) Chlamydiae c) Spirochaetes d) Fusobacteria e) Bacterioidetes
  6. Which of the following is a bacterial infection of insects that influences their reproductive behavior? a) Bdellovibrio b) Wolbachia c) Epilopiscium d) Staphylococcus e) Lactobacillus
  7. Helicobacter pylori causes a) peptic ulcers and gastric cancer. b) plague or black death. c) tooth decay. d) pneumonia. e) food poisoning
  1. Which of the following statements is FALSE? a) Fungi may produce sexual spores b) Fungi may produce asexual spores. c) Fungi can be multicellular. d) Fungi can be unicellular e) Fungi may be photosynthetic.
  2. Which of the following can produce very potent neurotoxins? a) Treponema pallidum b) Green algae. c) Trichomonas vaginalis. d) Dinoflagellates. e) Euglena
  3. Which of the following genera causes malaria? a) Plasmodium b) Yersinia. c) Giardia d) Entamoeba. e) Trypanosoma
  4. Which of the following about protozoa is/are TRUE? a) They are chemoheterotrophs. b) They can reproduce sexually or asexually. c) They may be motile d) Both A and B are true e) All of the above are true
  5. Which of the following would be found as microscopic amoeboid cells under favorable conditions but come together to form a multicellular, motile, spore-forming structure call a “slug” under unfavorable conditions? a) Streptomyces. b) Cellular slime mold. c) Trypanosoma d) Water mold e) Amoebozoa
  6. Which of the following is the best reason for NOT classifying viruses into the three domains of life? a) Some viruses can incorporate their genome into a host's genome. b) Viruses direct anabolic pathways of host cells. c) Viruses are obligate parasites. d) Viruses do not produce their own ribosomes. e) Viruses may be enveloped or non-enveloped.
  7. During the life cycle of a lytic Bacteriophage, which statement(s) is/are TRUE? a) The host DNA may become fragmented b) Generalized transduction may occur c) Specialized transduction may occur. d) Answers A and B are correct e) All of the above are correct
  1. Place the following in the most likely order for the life cycle of a "-" strand RNA virus.
  2. attachment 2) maturation 3) viral RNA synthesis 4) release 5) viral RNA translation a) 1,2,5,3, b) 1,3,5,2, c) 5,3,4,2, d) 1,5,2,3, e) 2,5,4,3,
  3. Which of the following would be the earliest step in the biosynthesis of a retrovirus? a) Synthesis of viral DNA from a viral RNA template. b) Synthesis of double-stranded viral RNA from a viral RNA template. c) Synthesis of double-stranded viral RNA from a viral DNA template d) Transcription of viral mRNA from viral DNA e) Translation of viral proteins from newly synthesized (+) strand of viral RNA.
  4. The ability of Escherichia coli H157:O7 to produce the Shiga exotoxin is provided by a bacteriophage. Which of the following statements regarding this bacteriophage infection is/are TRUE? a) The bacteriophage exists as a prophage b) This is an example of a lysogenic bacteriophage infection c) The Shiga exotoxin genes were captured by the bacteriophage and are not necessary for its life cycle d) Answers A and B are correct e) All of the above are correct
  5. The phospholipids contained in a viral enveloped are produced by? a) DNA viruses only b) RNA viruses only c) Viruses with segmented genomes only d) The infected host cell e) None of the above
  6. RNA viruses (non-retroviruses) carry which of the following enzymes in the virus itself? a) RNA-dependent RNA polymerase b) Lysozyme c) DNA-dependent DNA polymerase d) Reverse transcriptase e) Helicase
  7. What life-threatening condition/illness can be caused by human papillomavirus virus (HPV)? a) Peptic ulcer disease b) Cervical cancer c) Polio d) Cold Sores e) Liver cancer
  8. What statement regarding hepatitis B virus (HBV) is/are TRUE? a) It can cause liver disease and cancer b) Millions of people worldwide are chronically infected with HBV c) An effective vaccine is available d) Answers A and B are correct e) All of the above are correct

Answer Key Question Answer 1 B 2 A 3 D 4 A 5 B 6 B 7 B 8 A 9 E 10 A 11 D 12 A 13 B 14 A 15 B 16 D 17 D 18 C 19 D 20 A 21 E 22 E 23 D 24 A 25 E 26 B 27 D 28 D 29 B 30 A 31 E 32 D 33 A 34 B 35 E 36 E 37 B 38 D 39 E 40 E