BIO 111 Lecture Notes - Lecture 1: Potassium Channel, Signify, Deoxyribonuclease

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Dna and proteins were the candidates for the hereditary material. Proteins contain 20 amino acids that can be sequenced in different ways: dna and rna each contain only four types of nucleotides. Researchers showed that dna can fulfill all these functions! Key experiments leading to knowledge that dna is. Avery and colleagues used enzymes that break down dna (dnase), or rna (rnase), or protein (protease) in separate experiments to digest the substance which allowed. Streptococcus to produce a capsule and become virulent. The only enzyme that had an effect was the dnase, which prevented the. Dna was the transforming substance: hershey and chase"s experiment, used a virus called a t phage, composed of radioactively labeled. Dna and coat proteins (in two separate experiments) to infect. They discovered that radioactively labeled dna, but not protein, ended up inside the bacterial cells, causing them to become transformed. Only the genetic material could have caused this transformation.

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