Bacteria Virus Worksheet Bl


Bacteria Worksheet   




Bacterial Cell Evolution

1. Bacteria are microscopic _____________.

2. Fossils evidence shows bacteria are about __________ years old, while eukaryotes are about __________ years old.

3. Discuss where bacteria can be found.


4. Ribosomal differences have put bacteria into what two kingdoms? Which is the older group?


5. What is absent in the cell wall of Archaebacteria? Describe this substance.



6. Describe the environments in which you would find Archaebacteria.



7. Compare & contrast these tree groups of Archaebacteria — methanogens, extreme halophiles, and thermoacidophiles.





8. Most bacteria are found in what kingdom?

9. Name & describe the three shapes of Eubacteria.



10. Are Eubacteria aerobic or anaerobic? Explain.


11. Eubacteria may be heterotrophic or photosynthetic. Explain what this means & give an example of each type.



12. What type of staining is used to group Eubacteria?

13. Describe the appearance of gram-positive and gram-negative bacteria under a microscope.


14. Explain why Eubacteria do not all stain the same color during Gram staining.


15. Describe, in detail, cyanobacteria.



16. Cyanobacteria, also known as ______________ bacteria lack a membrane bound __________ & _____________.

17. How are heterocysts helpful to cyanobacteria?


18. What is eutrophication?


19. Explain the role of cyanobacteria in eutrophication.



20. What bacterium causes syphilis? Describe this bacteria.


21. Streptococci bacteria causing strep throat are in what group?

22. Why are actinomycete bacteria important?


23. Compare & contrast these three groups of Proteobacteria — enteric bacteria, chemoautotrophs, and nitrogen-fixing bacteria.





24.Name a genus of nitrogen-fixing bacteria found on the roots of soybeans in our area.


Characteristics of Bacteria

25. Name the three main parts of all bacteria.


26. Describe the cell wall of bacteria. How does this differ from a plant cell wall?



27. Compare & contrast the cell membrane of Eubacteria with that of other eukaryotes.



28.Are Gram positive or negative bacteria more protected against antibiotics & why?


29. Where does cell respiration take place in eukaryotes? in bacteria?

30. Describe how the cell membrane of photosynthetic bacteria are adapted for this process. Where does this process take place in plants?



31. Compare & contrast the cytoplasm of bacteria with that of eukaryotes.



32. Describe the DNA (hereditary material) found in bacteria. Make a sketch of what you think this would look like.




33. Where is the capsule of a bacteria, what is it made of, and give two ways it helps a bacterium?



34. Where is the glycoclayx of a bacteria, what is it made of, and how does it help a bacterium?


35. How do pili help the bacteria that have them?


36. How do Gram positive bacteria protect themselves against harsh environments?


37. Describe two methods of locomotion in bacteria.



38. Compare & contrast saprophytic and photoautotrophic bacterial nutrition.



39. Distinguish among these three bacteria & give an example of each — obligate anaerobes, facultative anaerobes, & obligate aerobes.





40. Compare & contrast these three methods of bacterial reproduction — transformation, conjugation, and transduction.




Bacteria and Humans

41. What does a pathologist do for a living?


42. Compare & contrast the two types of toxins bacteria produce.



43. Besides injuring the body by releasing toxins, how else do bacteria hurt the body?


44. Describe four antibiotics against bacteria.




45. Explain how antibiotic resistance occurs.



46. Name two  bacterial diseases carried by ticks.

47. name two bacterial diseases caused by eating contaminated food.

48. Name a sexually transmitted bacterial disease.

49. Name a bacterium that can cause disease whenever it gets into deep wounds.

50. Name a bacterium that is transmitted by coughing & infects the lungs.

51. Describe, in detail, how bacteria can be useful to humans.



DNA & Protein Synthesis Chapter 10 Worksheet


    DNA & Protein Synthesis


Section 10-1 DNA

1. What does DNA stand for?

2. What is DNA’s primary function?

3. What is the function of proteins?

4. What are the repeating subunits called that make up DNA?

5. Name the 3 parts of a DNA nucleotide.

6. Sketch and label a DNA nucleotide.

7. Name the 4 nitrogen bases on DNA.

8. What is the difference between a purine & a pyrimidine?

9. Name 2 purines.

10. Name 2 pyrimidines.

11.Who is responsible for determining the structure of the DNA molecule & in what year was this done?

12. The model of DNA is known as a ____________________________ because it is composed of two ___________________ chains wrapped around each other.

13. What makes up the sides of a DNA molecule?

14. What makes up the “steps” of a DNA molecule?

15. How did Rosalind Franklin contribute to determining the structure of DNA?

16. What type of bonds holds the DNA bases together? Are they strong or weak bonds?

17. What makes up the “backbone” of the DNA molecule?

18. On DNA, a ____________________ base will always pair with a __________________ base.

19. What is the most common form of DNA found in organisms?

20. How many base pairs are in a full turn or twist of a DNA molecule?

21. Name the complementary base pairs on DNA.

22. How many hydrogen bonds link cytosine & guanine? adenine & thymine?

23. How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA?

24. Why must DNA be able to make copies of itself?

25. Define DNA replication.

26. What is the first step that must occur in DNA replication?

27. What acts as the template in DNA replication?

28. What is a replication fork?

29. What enzymes help separate the 2 strands of nucleotides on DNA? What bonds do they break?

30. What is the function of DNA polymerases?

31. ____________________ are joined to replicating strands of DNA by ________________ bonds.

32. If the sequence of nucleotides on the original DNA strand was A – G – G – C – T – A, what would be the nucleotide sequence on the complementary strand of DNA?

33. Does replication of DNA begin at one end and proceed to the other? Explain.

34. Why does DNA replication take place at many places on the molecule simultaneously?

35. When replication is complete, how do the 2 new DNA molecules compare to each other & the original DNA molecule?

36. Is DNA replicated (copied) before or after cell division?

37. Sketch & label DNA replication. (Figure 10-5, page 188)

38. What is the error rate in DNA replication? What helps lower this error rate to 1 in 1 billion nucleotides?

39. What is a mutation?

40. Name several things that can cause DNA mutations.


Section 10-2 RNA


41. What sugar is found on DNA?

42. What base is missing on RNA, & what other base replaces it?

43. Uracil will pair with what other on DNA?

44. Is RNA double or single stranded?

45. Name the 3 types of RNA and tell the shape of each.

46. Which type of RNA copies DNA’s instructions in the nucleus?

47. Which type of RNA is most abundant?

48. What does tRNA transport?

49. What 2 things make up ribosomes?

50. Define transcription.

51. In what part of a cell are proteins made?

52. What is RNA polymerase & tell its function.

53. What are promoters?

54. Where does RNA polymerase bind to the DNA it is transcribing?

55.What makes the beginning of a new gene on DNA in eukaryotes?

56. What do promoters mark the beginning of on prokaryotic DNA?

57. When a promoter binds to DNA, What happens to the double helix?

58. Are both strands of DNA copied during transcription?

59. As RNA polymerase moves along the DNA template strand, what is being added?

60. What bases pair with each other during transcription?

61. What is the termination signal?

62. What happens when RNA polymerase reaches the termination signal?

63. What are the products of transcription called?

64. Transcripts are actually ____________________________ molecules.

65. In transcription, ________________________’s instructions for making a protein

are copied by _______________________.

66. Which RNA molecules are involved in the synthesis (making) of a protein?

67. What happens to the newly made mRNA molecule following transcription in the nucleus?


Section 10-3 Protein Synthesis


68. What makes up proteins, what are the subunits called, & what bonds them together?

69. How many different kinds of amino acids make up proteins?

70. What determines how protein polypeptides fold into 3-dimensional structures?

71. Why does a protein need a 3-dimensional structure?

72. What is the genetic code & why is it important?

73. What is a codon & what does each codon code for?

74. How many codons exist?

75. Name the amino acid coded for by each of these codons:

a. UUA

b. AUU

c. UGU

d. AAA

e. GAG

f. UAA

76. What codon starts protein synthesis?

77. What codons stop protein synthesis?

78. Proteins are synthesized (made) at what organelle in the cytosol?

79. Sketch and label a tRNA molecule & tell its function.

80. Define translation & tell how it starts.

81. Where are amino acids found in a cell & how are they transported?

82. What is an anticodon & where is it found on tRNA?

83. What codon on mRNA would bind with these anticodons: (use table 10-1, page 194)

a. AAA

b. GGA

c. UAC

d. CGU

84. What are ribosomes made of and in what 2 places can they be found in a cell?

85. What is the difference between proteins made by free ribosomes & those made by attached, membrane proteins on the ER?

86. How many binding sites are found on the ribosomes and what does each site hold?

87. To start making a protein or _________________________________, a ribosome attaches to the ______________________________ codon on the __________________ transcript.

88. The start codon, AUG, pairs with what anticodon on a tRNA molecule?

89. What amino acid does the start codon always carry?

90. What type of bonds are the ones that attach amino acids to each other in a growing polypeptide?

91. __________________________ are linked to make proteins as a ______________________ moves along the mRNA transcript.

92. What ends translation?

93. Can more than one ribosome at a time translate an mRNA transcript? Explain.

94. What determines the primary structure of a protein?

95. What would the translation of these mRNA transcripts produce?