WorksheetsTutorial 2
Total questions: 29
Worksheet time: 15mins
1. Microorganism can be defined as______________
a) Acellular viruses.
b) Unicellular and multicellular organisms
c) small living things that can’t be seen by naked eyes
d) All of the above
2. Which microorganism(s) among the following perform photosynthesis by utilizing light?
Fungi
Viruses
Cyanobacteria
All of the above.
3. Which among the following are produced by microorganisms?
Breads
Alcoholic beverages
Fermented dairy products
All of the above
5. Esherichia coli and Klebsiela sp appear pinkish in colour under observation of microscope mainly because of_____________.
a) It can produce spore
b) It has thick wall of peptidoglycan
c) It has capsule outside of cell wall.
d) It takes remain safranin in their cytoplasm during staining
6. Obligate aerobes bacteria will die if expose to___________ gas at high concentration
a) oxygen
b) nitrogen
c) hydrogen
d) carbon dioxide
7. Which of the following condition is suitable for Candida albicans to growth?
a) Acidic
b) Neutral
c) Alkaline
d) All of the above
8. Which domain is able to survive in human body temperature and has potential to invade human tissues?
a) Archae
b) Bacteria
c) Eukarya
d) Animalia
9. Which of the following would NOT be the entry portal of infection?
a) Skin
b) Meninges
c) Placenta
d) Small intestine
10. Which of the following component that absent in prokaryote but present in eukaryote cell?
a) DNA
b) Ribosomes
c) Rough endoplasmic reticulum
d) Cytoplasmic fluid
11. Diagram A is one method of genetic transfer in bacteria. Which of the following statement is referring to Diagram A?
a) Multiplication of viral DNA inside bacteria cell
b) The progeny may contain viral DNA only
c) Bacterial genetic haven’t passing to progeny
d) Formation of viral capsid occur outside of the bacterial cell
12. Diagram A shows one type of growth practice by microorganism. Which is NOT the advantage of this method
a) Identical to parents
Genetic variation
c) Fast growing rate
d) Both of parents passes its gene
13. Which of the following is the lethal temperature for mesophiles to growth?
a) 27oC
b) 47oC
c) 67oC
d) 87oC
14. Why bacteria need to be cultured in the laboratory condition?
a) Bacteria have to be grown to be identified and subsequent clinical diagnosis
and genetic studies
b) Bacteria must be isolated growth on culture media and obtained as
pure culture for identification study
c) Bacteria have to be cultured in order to obtain antigens from developing
serological assay
d) All of the above
15. Which of the following is TRUE about normal flora?
a) Parasite and virus are normal flora
b) Resident normal flora is temporary present on site of body
c) Transient normal flora is permanently growth at certain body site
d) Bacteria or fungi are permanent residents of certain body site
16. Why only few numbers of microorganisms can be found in stomach?
a) Lack of nutrient source
b) Unsuitable temperature
c) Inhibitory effects of gastric juice
d) None of the above.
17. The uses of immersion oil during 100x magnification could possibly reduce the _______ of microscope hence improved the quality of image observed
a) magnification
b) reflection
c) refractive Index
d) ionizing rays
18. Which instrument is used in moist heat sterilization method?
a) Oven
b) Incubator
c) Autoclave
d) Centrifuge
19. In which binary fission phase able to observe the most endospores in Bacillus sp cell culture
a) death phase
b) lag phase
c) log phase
d) stationary phase
20. Which of the following is non ionizing radiation?
a) X-rays
b) UV-rays
c) Cosmic rays
d) Gamma rays
21. An inoculated thioglycolate medium culture tube shows dense growth at the
surface and turbidity throughout the rest of the tube.
What is your conclusion from the statement above?
a) The organisms die in oxygen
b) The organisms are facultative anaerobes
c) The organisms are obligate aerobes
d) The organisms should be grown in an anaerobic chamber
22. The image observed under 40X objective lens most probably is_________ total magnification
a) 4X
b) 40X
c) 400X
d) 4000X
23. Which of the following objective lens is needed to use immersion oil?
a) 4X objective lens
b) 10X objective lens
c) 40X objective lens
d) 100X objective lens
24. Streptococcus mutans is a major cause of cavities. It resides in the gum pockets, does not have catalase activity, and can be grown outside of an anaerobic chamber.
Which of the following characteristics is referring to Streptococcus mutans?
a) A facultative anaerobe
b) An obligate aerobe
c) An obligate anaerobe
d) An aerotolerant anaerobe
25. Which of the following condition is referring to salt marshes bacteria?
a) Acidophiles
b) Barophiles
c) Halotolerant
d) Thermophiles
26. Which of the following bacteria isolated from Lake Natron and able to live in water pH close to 10?
a) Alkaliphiles
b) Neutrophiles
c) Obligate Anaerobes
d) Facultative Anaerobes
Which of the following are TRUE about pour plate method?
i. Bacteria cells are added to surface solid media
ii. Bacteria cells are grown on the surface solid media
iii. Bacteria cells are appeared both within, beneath and top of the agar
iv. Bacteria cells are swirl to liquid medium after pour to empty petri dish
a) I & III
b) II & III
c) II & IV
d) III & IV
28. ________________ is use to stain human blood cells which appear same
colour to all the cells under microscopic observation
a) Safranin
b) Crystal violet
c) Loaffler’s methylene blue
d) Ziehl-Neelsen stain
29. A soup container was forgotten in the refrigerator and shows contamination. Which of the following caused the contamination?
a) Thermophiles
b) Acidophiles
c) Mesophiles
d) Psychrotrophs
30. What is the main function of safranin in gram staining procedure?
a) Mordant
b) Decolorized
c) Primary stain
d) Counter stain
