week 11

Question 1

1) Which of the following statements is not correct? A) Eukaryotes are more complex than prokaryotes. B) Eukaryotes differ from prokaryotes in having a distinct nucleus and nuclear membrane (envelope). C) Eukaryotes are usually larger than prokaryotes. D) Eukaryotes are usually smaller than viruses. E) All of the above alternatives are correct.

Answer 1

1) Which of the following statements is not correct? A) Eukaryotes are more complex than prokaryotes. B) Eukaryotes differ from prokaryotes in having a distinct nucleus and nuclear membrane (envelope). C) Eukaryotes are usually larger than prokaryotes. D) Eukaryotes are usually smaller than viruses. * E) All of the above alternatives are correct.

Question 2

2) Which of the following microorganisms is not a eukaryote? A) a protozoa B) a bacterium C) a fungus D) an amoeba E) a yeast

Answer 2

2) Which of the following microorganisms is not a eukaryote? A) a protozoa B) a bacterium * C) a fungus D) an amoeba E) a yeast

Question 3

3) Which of the following best describes what happens when a bacterial cell is placed in a solution containing 5% NaCl? A) Water will move out of the cell. B) Water will move into the cell. C) Sucrose will move into the cell from a higher to a lower concentration. D) The cell will undergo osmotic lysis. E) No change will result; the solution is isotonic.

Answer 3

3) Which of the following best describes what happens when a bacterial cell is placed in a solution containing 5% NaCl? A) Water will move out of the cell. * B) Water will move into the cell. C) Sucrose will move into the cell from a higher to a lower concentration. D) The cell will undergo osmotic lysis. E) No change will result; the solution is isotonic.

Question 4

4) Which of the following statements is untrue? A) All fungi are multicellular. B) All viruses are parasites. C) All bacteria lack nuclear membranes. D) All fungi have nuclear membranes. E) All protozoa are unicellular.

Answer 4

4) Which of the following statements is untrue? A) All fungi are multicellular. * B) All viruses are parasites. C) All bacteria lack nuclear membranes. D) All fungi have nuclear membranes. E) All protozoa are unicellular.

Question 5

5) Which of the following does not have a plasmalemma (cell membrane)? A) Bacteria B) Viruses C) Fungi D) Protozoa E) Yeast

Answer 5

5) Which of the following does not have a plasmalemma (cell membrane)? A) Bacteria B) Viruses * C) Fungi D) Protozoa E) Yeast

Question 6

6) “MRSAs” were originally known as methicillin-resistant staphylococci aureus and are now known as multi-resistant staphylococci aureus. Which of the following statements is not true concerning MRSAs? A) They readily colonise the nose and the skin. B) They occur naturally and have not arisen through the overuse of antibiotics. C) They are resistant to all penicillin and methicillin products. D) They attack older people in hospitals and nursing homes and those with low immunity. E) MRSAs are not the same organism as VREs

Answer 6

6) “MRSAs” were originally known as methicillin-resistant staphylococci aureus and are now known as multi-resistant staphylococci aureus. Which of the following statements is not true concerning MRSAs? A) They readily colonise the nose and the skin. B) They occur naturally and have not arisen through the overuse of antibiotics. * C) They are resistant to all penicillin and methicillin products. D) They attack older people in hospitals and nursing homes and those with low immunity. E) MRSAs are not the same organism as VREs

Question 7

7) A “cocci” bacteria is shaped like: A) a rod B) a spiral C) a sphere D) Mickey Mouse E) None of the above

Answer 7

7) A “cocci” bacteria is shaped like: A) a rod B) a spiral C) a sphere * D) Mickey Mouse E) None of the above

Question 8

8) Gram stain is performed on the _____ of the cell: A) cell membrane B) genome C) cell wall D) ribosomes E) lysosomes

Answer 8

8) Gram stain is performed on the _____ of the cell: A) cell membrane B) genome C) cell wall * D) ribosomes E) lysosomes

Question 9

9) Gram negative bacteria are coloured ________________ in a Gram stain test: A) White B) Green C) Red D) Blue E) Yellow

Answer 9

9) Gram negative bacteria are coloured ________________ in a Gram stain test: A) White B) Green C) Red * D) Blue E) Yellow

Question 10

10) What consists of a nucleic acid genome packaged into a protein coat (capsid) or a membrane (envelope)? A) Virus B) Virion C) Bacteriophage D) Capsomere E) Pentamer

Answer 10

10) What consists of a nucleic acid genome packaged into a protein coat (capsid) or a membrane (envelope)? A) Virus * B) Virion C) Bacteriophage D) Capsomere E) Pentamer

Question 11

11) In a healthy human, resident microorganisms would be found in all of the following areas except: A) lower urethra B) conjunctiva C) Bloodstream D) tooth and gum surfaces E) nasal passages

Answer 11

11) In a healthy human, resident microorganisms would be found in all of the following areas except: A) lower urethra B) conjunctiva C) Bloodstream * D) tooth and gum surfaces E) nasal passages

Question 12

12) When the plague devastated the population of Europe in the Middle Ages, why did people catch the disease even if they didn’t come into contact with infected people or dead bodies? A) The infectious organism washed out of bodies into the public water supply B) The infectious organism produced endospores that persisted in houses and public places C) The infectious organism persisted on nearly any surface in a state of non-growth activity and was readily picked up by unsuspecting people D) The infectious organism was transmitted from bodies to rats, then to fleas, and from fleas to people E) Both A) and B) above

Answer 12

12) When the plague devastated the population of Europe in the Middle Ages, why did people catch the disease even if they didn’t come into contact with infected people or dead bodies? A) The infectious organism washed out of bodies into the public water supply B) The infectious organism produced endospores that persisted in houses and public places C) The infectious organism persisted on nearly any surface in a state of non-growth activity and was readily picked up by unsuspecting people D) The infectious organism was transmitted from bodies to rats, then to fleas, and from fleas to people* E) Both A) and B) above

Question 13

13) Which of the following is smallest in physical size? A) Yeasts B) Viruses C) Bacteria D) Fungi E) Parasites

Answer 13

13) Which of the following is smallest in physical size? A) Yeasts B) Viruses * C) Bacteria D) Fungi E) Parasites

Question 14

14) Which of the following can contain genes that can make an organism antibiotic resistant? A) Pili B) Capsule C) Flagella D) Plasmid E) Outer membrane

Answer 14

14) Which of the following can contain genes that can make an organism antibiotic resistant? A) Pili B) Capsule C) Flagella D) Plasmid * E) Outer membrane

Question 15

15) Which of the following depends on the biochemical machinery of the host cell for replication, and reproduction occurs by assembly of the individual components rather than by binary fission? A) Bacteria B) Fungi C) Viruses D) Parasites E) Yeasts

Answer 15

15) Which of the following depends on the biochemical machinery of the host cell for replication, and reproduction occurs by assembly of the individual components rather than by binary fission? A) Bacteria B) Fungi C) Viruses * D) Parasites E) Yeasts

Question 16

16) Which of the following is NOT a property of viruses? A) Viruses are filterable agents B) Viruses cannot make energy independently of a host cell C) Viral genomes may be RNA or DNA but not both D) Viral components must self-assemble E) Viruses are living organisms

Answer 16

16) Which of the following is NOT a property of viruses? A) Viruses are filterable agents B) Viruses cannot make energy independently of a host cell C) Viral genomes may be RNA or DNA but not both D) Viral components must self-assemble E) Viruses are living organisms *

Question 17

17) Which of the following statement about viruses is not correct? A) Viruses consist of DNA or RNA surrounded by a protein coat (capsid). B) Viruses are an acellular infectious agent. C) Viruses do not require host cell machinery in order to replicate. D) Viruses cannot survive for long outside a suitable host. E) Viruses are not prokaryotes.

Answer 17

17) Which of the following statement about viruses is not correct? A) Viruses consist of DNA or RNA surrounded by a protein coat (capsid). B) Viruses are an acellular infectious agent. C) Viruses do not require host cell machinery in order to replicate. D) Viruses cannot survive for long outside a suitable host. * E) Viruses are not prokaryotes.

Question 18

18) Viruses are not susceptible to antibiotics because A) Antibiotics work by targeting cellular machinery. B) Viruses are surrounded by an impenetrable cell wall. C) Viruses are not “alive”. D) Viruses have developed resistance to all antibiotics. E) All of the above

Answer 18

18) Viruses are not susceptible to antibiotics because A) Antibiotics work by targeting cellular machinery. * B) Viruses are surrounded by an impenetrable cell wall. C) Viruses are not “alive”. D) Viruses have developed resistance to all antibiotics. E) All of the above

Question 19

19) Which of the following is not fungal related? A) Cryptococcus neoformans B) Candida albicans C) Tinea nigra D) Chlamydiae E) all of the above

Answer 19

19) Which of the following is not fungal related? A) Cryptococcus neoformans * B) Candida albicans C) Tinea nigra D) Chlamydiae E) all of the above