1. Introduction to Biology

2. Chemistry

3. Water

4. Biomolecules

5. Cell Components

6. The Membrane

7. Energy and Metabolism

8. Respiration

9. Photosynthesis

10. Cell Signaling

11. Cell Division

12. Meiosis

13. Mendelian Genetics

14. DNA Synthesis

15. Gene Expression

16. Regulation of Expression

17. Viruses

18. Biotechnology

19. Genomics

20. Development

21. Evolution by Natural Selection

22. Evolution of Populations

23. Speciation

24. History of Life on Earth

25. Phylogeny

26. Prokaryotes

27. Protists

28. Plants

29. Fungi

30. Overview of Animals

31. Invertebrates

32. Vertebrates

33. Plant Anatomy

34. Vascular Plant Transport

35. Soil

36. Plant Reproduction

37. Plant Sensation and Response

38. Animal Form and Function

39. Digestive System

40. Circulatory System

41. Immune System

42. Osmoregulation and Excretion

43. Endocrine System

44. Animal Reproduction

45. Nervous System

46. Sensory Systems

47. Muscle Systems

48. Ecology

49. Animal Behavior

50. Population Ecology

51. Community Ecology

52. Ecosystems

53. Conservation Biology

[BOOK BIO] CLUTCH

Of the way they grew on artificial media.

The "S" bacteria formed smooth appearing colonies.

The "R" bacteria formed rough appearing colonies.

The bacteria that Griffith experimented with were termed "R" and "S" bacteria because:

Genetics - The Transforming Principle - Lesson 12 | Don't Memorise

Griffith's experiment

consists of sugars, phosphate groups, and bases

No. Another group of researchers figured that out.

has two strands held together with hydrogen bonds

uses three bases to code for one amino acid

contains adenine, guanine, thymine, and cytosine

was the substance that transformed the bacteria in Griffith's experiment

Their studies extended Griffith's work.

Avery and his colleagues' 1944 experiment showed that DNA __________.

In his work with pneumonia-causing bacteria and mice, Griffith found that
a. the protein coat from pathogenic cells was able to transform nonpathogenic cells.
b. heat-killed pathogenic cells caused pneumonia.
c. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic.
d. the polysaccharide coat of bacteria caused pneumonia.

The Griffith Experiment

Griffith's Experiment - DNA as Genetic Material II Transformation experiment

No. It was a pathogenic strain that transformed a nonpathogenic strain.

living nonpathogenic; heat-killed pathogenic

living pathogenic; heat-killed nonpathogenic

heat-killed nonpathogenic; living pathogenic

heat-killed pathogenic; living nonpathogenic

Review the details of Griffith's experiments. Imagine how shocking this discovery was.

During Griffith's experiments with Streptococcus pneumoniae in mice, material from __________ bacteria transformed __________ bacteria.

Episode 003 - Frederick Griffith's Experiment

Griffith's Experiment: Bacterial Transformation

Griffith experiment | bacterial transformation experiment

Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain converts the living cells into the pathogenic form.

Mixing heat-killed nonpathogenic bacteria with a living pathogenic strain makes the living strain nonpathogenic.

Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.

Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

In his transformation experiments, what phenomenon did Griffith observe?

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