Texas Southern University - BIOL 347

Chapter 01

Humans and the Microbial World

Matching Questions

1)Which of the following best matches the description:

1. Was the first to see microscopic organisms               
2. Disproved spontaneous generation for "large" organisms                 
3. Showed the importance of the hay infusion in the results                  

concerning spontaneous generation  

4. Discovered the heat-resistant form of bacteria          
5. Disproved spontaneous generation for "small" organisms             

2. Which of the following best matches the description:

1. Has a rigid cell wall made of peptidoglycan           
2. May use flagella to move        
3. Has membrane-bound organelles      
4. Has a nuclear membrane        
5. Has a cytoskeleton      

True / False Questions

1. Spontaneous generation referred to the idea that organisms came from other organisms.

2. The human body only contains bacteria during illness.
3. Bacteria and Eucarya both contain membrane-bound organelles.

4. The scientific name of an organism indicates its domain.

5. Viroids are naked pieces of DNA that infect plants.

6. Viruses simultaneously contain DNA, RNA and protein.

7. Viruses, viroids, and prions are obligate intracellular agents.

8. Viruses and bacteria are both based on the unit of a cell.

9. The size of an organism determines its domain.

10. Archaea are very similar to Bacteria and have rigid cell walls made of peptidoglycan.
11. Thiomargarita namibiensis could not be a eukaryote because it is only 1mm in width.

Essay Questions

12. What would likely have been the results of Pasteur's experiments on Spontaneous Generation if his laboratory had been housed in a stable?

13. What are determining factors in limiting the size of a cell?

14. Why is the study of bacteria important?