Biology Lab Practice Questions With Answers (Set 05)

1. Why do Gram-positive bacteria appear purple after Gram staining?
2. Why do Gram-negative bacteria appear reddish-pink after Gram staining?
3. What do you know about the cell wall of Gram-positive bacteria?
4. What do you know about the cell wall of Gram-negative bacteria?
5. Is the bacterium E. coli Gram-positive or Gram-negative?
6. What is the purpose of the washing steps during the Gram-staining procedure?
7. Are Gram-stained bacteria dead or still alive?
8. In the picture of yeast on page 7, label 1. refers to ___________
9. In the picture of yeast on page 7, label 2. refers to ___________
10. In the picture of yeast on page 7, label 3. refers to ___________
11. What are two major differences between prokaryotic and eukaryotic cell structures?
12. What chemical associated with the cell wall gives Gram-positive bacteria their final color?
13. In what ways are cyanobacteria like algae and land plants?
14. In what ways are cyanobacteria different from algae and land plants?
15. How can cyanobacteria, in contrast of saprotrophic bacteria, live in an environment that lacks organic nutrients?
16. List one major type of obtaining organic nutrients and give an example of a protist with this type of nutrition.
17. List one structure of locomotion found among protozoans and name an organism that uses this structure.
18. List another structure of locomotion found among protozoans and name an organism that uses this structure.
19. Name a protist that has both chloroplasts and flagella.
20. Which structure makes the above protist algal like?
21. Which structure makes the above protozoan like?
22. How do slime molds obtain their nutrients?
23. How do slime molds survive in conditions unfavorable to growth?
24. Could an ecosystem that contains only protists remain in continued existence (i.e. sustainable)?
25. Explain your answer for question 24.
26. Both fungi and animals are heterotrophs but they are markedly different in how they acquire nutrients. Explain.
27. List the name of one fungus that is made of single cells (unicellular).
28. List the name of one fungus that is made of multiple cells (pluricellular).
29. What is the functional purpose of spores in fungi?
30. Are fungi autotroph organisms?

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