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: I 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 microsecope, the resolving power of the electroe microscope is a. Greater b. Less c. Equald. None of the above 3. The total magnification power of a light microscope can be atained by a. Adding the eyepiece magnification plus the objective magnification b. Subtracting the objective magnification from the eyepiese magnificatione d. None of the above 4. To regulate the amount of light that goes through, a studet should adjust the of light microscope a. Condenser b. Eyepiece e.Diaphragm d. Body tube 5. An organism such as E col is classified as a Biosafety levelorganism a. One b, Two c. Three d. Four 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 coetrast microscope? a. Motility of the cell b. Bacterial nucleoid c. Cell wall d. Glycocalyx s. Fungi ne all the following except are asexual fungal spores except a. saprophýtes b. prokaryotes c.eukaryotes d. responsible for decay of dead plants 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 9. 10. A a Mixed: aseplicbAseptier pure e.ur micde culture contains more than one kind of organism. Mixed, pure

Explanation / Answer

1. Ans- c. 10x

Explanation:

If the lens has the smallest magnification then it has the largest field of view.

2. Ans- a. greater

Explanation:

The electron microscope has high resolving power as compared to the light microscope, it’s up to 0.0001µm.

3.Ans- d. None of the above.

Explanation:

The total magnification of the compound light microscope = multiply the magnification power of the ocular lens by the power of the objective lens. That is

TOT Mag =MAGobj x MAGocu

4. Ans- c. diaphragm

Explanation:

Condenser concentrates the light from the light source.

Eyepiece consists of one lens of 10 power magnification.

Diaphragm regulates the amount of light passing that goes through the stage opening

Body tube keeps the eyepiece lens and objective lens at the correct distance for magnification

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