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AP Biology: Unit 6 exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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AP Biology: Unit 6 exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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AP Biology: Unit 6 exam | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
What is the structure of DNA? - Molecules called nucleotides, each nucleotide has a phosphate group,
sugar group, and a nitrogen base. Its made up of 2 strands forming a double helix
Role of Alfred Hershey and Martha Chase in discovering the structure of DNA - -Alfred Hershey and
Martha chase performed experiments showing that DNA is the genetic material of a phage known as T2
-They designed an experiment showing only 2 components of T2 (DNA or protein) enters an E.coli cell
during infection.
-They concluded that the injected DNA of the phage provides genetic information
Steps of DNA replication - -Initiation
-Elongation
-Termination
Initiation - Proteins bind to origin of replication while helicase unwinds the DNA helix and two
replication forks formed at the origin of replication.
Elongation - Primer sequence is added with complementary RNA nucleotides which are replaced by DNA
nucleotides
Termination - Occurs when converging replication forks meet on opposite ends of parental
chromosome.
Replication - making of DNA from an existing DNA strand
Transcription - Synthesis of RNA under the direction of DNA (making a copy of a gene)
Translation - Synthesis of a polypeptide using info in the mRNA (making the gene a protein)
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