AP Biology: Unit 6 exam questions with correct answers

What is the structure of DNA? CORRECT ANSWER 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 CORRECT ANSWER -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 CORRECT ANSWER -Initiation -Elongation -Termination Initiation CORRECT ANSWER Proteins bind to origin of replication while helicase unwinds the DNA helix and two replication forks formed at the origin of replication. Elongation CORRECT ANSWER Primer sequence is added with complementary RNA nucleotides which are replaced by DNA nucleotides Termination CORRECT ANSWER Occurs when converging replication forks meet on opposite ends of parental chromosome. Replication CORRECT ANSWER makin