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BIO 205 MICROBIOLOGY EXAM QUESTIONS WITH COMPLETE SOLUTIONS 2024/2025
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BIO 205 MICROBIOLOGY EXAM QUESTIONS WITH COMPLETE SOLUTIONS 2024/2025
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ESTUDYBIO 205 MICROBIOLOGY EXAM QUESTIONS
WITH COMPLETE SOLUTIONS 2024/2025
1. **What happens when light is bent in microscopy, causing the image to become darker and harder to
see?**
a) Refraction
b) Diffraction
c) Reflection
d) Absorption
- **Answer:** b) Diffraction
2. **What term describes the change in the direction of light as it moves through air, water, or glass?**
a) Diffraction
b) Absorption
c) Reflection
d) Refraction
- **Answer:** d) Refraction
3. **What is the morphology and arrangement of Staphylococcus?**
a) Cluster of round cells
b) Chain of round cells
c) Rod-shaped cells
d) Pair of round cells
- **Answer:** a) Cluster of round cells
4. **What is the morphology and arrangement of Streptococcus?**
a) Rod-shaped cells
b) Chain of round cells
c) Cluster of round cells
d) Pair of rod cells
- **Answer:** b) Chain of round cells
5. **What is the morphology of bacilli?**
a) Round
b) Spiral
c) Rod-shaped
d) Clustered
- **Answer:** c) Rod-shaped
,ESTUDY
6. **What is the morphology of a tetrad?**
a) Cluster of four round cells
b) Chain of four round cells
c) Four rod-shaped cells
d) Pair of rod cells
- **Answer:** a) Cluster of four round cells
7. **What is the oxygen requirement for an obligate aerobe?**
a) Grows without oxygen
b) Grows with low oxygen
c) Grows with high oxygen
d) Grows without oxygen and with high oxygen
- **Answer:** c) Grows with high oxygen
8. **Where does an obligate anaerobe grow in a test tube?**
a) At the top
b) Throughout the tube
c) In the middle
d) At the bottom
- **Answer:** d) At the bottom
9. **Where does a facultative anaerobe grow in a test tube?**
a) At the top
b) Throughout the tube
c) In the middle
d) At the bottom
- **Answer:** b) Throughout the tube
10. **Where does a microaerophile grow in a test tube?**
a) At the top
b) Throughout the tube
c) In the middle
d) At the bottom
- **Answer:** c) In the middle
11. **What is the magnification of the ocular eyepiece in a microscope?**
a) 4x
b) 10x
c) 25x
d) 40x
- **Answer:** b) 10x
, ESTUDY
12. **Why do we stain microorganisms?**
a) To kill them
b) To make them grow faster
c) To see them more clearly
d) To preserve them
- **Answer:** c) To see them more clearly
13. **What is the magnification power of the scanning lens?**
a) 4x
b) 10x
c) 25x
d) 100x
- **Answer:** a) 4x
14. **What is the total magnification if the eyepiece is 25x and the scanning lens is used?**
a) 100x
b) 250x
c) 1000x
d) 2500x
- **Answer:** b) 250x
15. **What is the magnification power of the oil immersion lens?**
a) 4x
b) 10x
c) 40x
d) 100x
- **Answer:** d) 100x
16. **What is the total magnification if the eyepiece is 25x and the oil immersion lens is used?**
a) 100x
b) 250x
c) 1000x
d) 2500x
- **Answer:** d) 2500x
17. **What should you wear and bring for safety in the lab?**
a) Shorts, sandals, and no lab coat
b) Lab coat, long pants, closed-toe shoes, and protective goggles
c) T-shirt, shorts, and flip-flops
d) None of the above
- **Answer:** b) Lab coat, long pants, closed-toe shoes, and protective goggles
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