Answer all the following 50 questions. Part A: Questions 1-40 (multiple choice)

Question

Answer all the following 50 questions. Part A: Questions 1-40 (multiple choice) on scantron card. Part B: 2 short answer questions to be answered on question sheet Please return scantron cards and question sheet. Time allowed: 1 hour Part A: Multiple Choice (1-40) 1. Which objective provides the greatest field of view? a. 100x b.40x c. 10x d. all provide the same field of view 2. As compared to a light microscope, the resolving power of the electron microscope is a. Greater b. Less c. Equal d. None of the above 3. The total magnification power of a light microscope can be a. Adding the eyepiece magnification plus the objective magnification attained by b. Subtracting the objective magnification from the eyepiece magnificationee c. Multiplying the objective magnification and the objective magnification d. None of the above (IEP) 4. To regulate the amount of light that goes through, a student should adjust the a light microscope a. Condenser b. Eyepiece c. Diaphragm of d. Body tube . An organism such as E coli is clasified as a Biosafety level a. One organism. b. Two c. Three 6. The practice of containment by Microbiologists a. Prevents workers form contaminating themselves b. .Ensures that others and the work area do not become contaminated c. .Ensures that microbial cultures do not become contaminated with unwanted organism d. All of the above 7. Which of the following would be best observed for a bacterial cell using a phase contrast microscope? a. Motility of the cell b. Bacterial nucleoid c. Cell wall d. Glycocalyx 8. Fungi à all the following except are asexual fungal spores except a. saprophytes b. prokaryotes c. eukaryotes d. responsible for decay of dead plants 9. To retrieve a sample from a culture tube with an inoculating loop, the cap of the tube a. Removed and held with your teeth b. Removed and held with the fingers of the loop hand c. Removed with the fingers of the loop hand and placed on the lab bench d. Any method above works well 10. A contains only a single kind of organism, where asa culture contains more than one kind of organism d. Mixed; pure a. Mixed; aseptic b Aseptic; pure c. Pure; mixed

Explanation / Answer

1. Option C is correct.
The field of view is inversely proportional to the magnification.

2. Option A is correct.
The resolution power of electron microscope is greater than the light microscope.

3. Option D is correct
Total magnification power of a light microscope = Magnification power of ocular lens X Magnification power of the objective lens.

4. Option A is correct.
The Condenser is used to regulate the amount of light that passes through the specimen.

5. Option A is correct.

E coli is a biosafety level-I organism.

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