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Course: Biology library > Unit 17

Lesson 2: Discovery of DNA

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Discovery of DNA

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The Griffith experiment showed that certain strains of Streptococcus bacteria could transform from one strain to another when combined.

How did the Avery-MacLeod-McCarty experiment expand on Frederick Griffith's observations?

(Choice A)
It suggested that DNA is the “transforming principle."
(Choice B)
It confirmed that DNA is a double helix composed of two antiparallel strands.
(Choice C)
It demonstrated that DNA consists of four nucleotides where the proportions of adenine/thymine and cytosine/guanine remain constant.
(Choice D)
It proved that DNA is semiconservatively replicated.

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Video 10 minutes 19 seconds

DNA as the "transforming principle"