PAPER 2026 STUDY GUIDE DETAILED ANSWERS
READY
◉ Semi-conservative Model of Replication.
Answer: Posits that when a double helix replicates, each daughter
molecule will have one old strand (derived or "conserved" from the
parent molecule) and one newly made strand
◉ Conservative Model of Replication.
Answer: Posits that when a double helix replicates, two parent
strands rejoin
◉ Dispersive Model of Replication.
Answer: Posits that when a double helix replicates, each strand is a
mix of old and new
◉ Origins of replication.
Answer: The point where the two DNA strands are separated,
opening up a replication "bubble"
◉ Primase.
, Answer: Adds RNA primers to the DNA strand which triggers the
start of the DNA replication process
◉ Helicase.
Answer: "Unzips" or "unwinds" the DNA double helix strands
creating replication forks
◉ DNA Polymerases.
Answer: Adds the complementary DNA nucleotides to the template
strand in the 5' to 3' direction
◉ Anti-parallel.
Answer: The fact that the two strands of the double helix run in
opposite directions, parallel but in reverse, with one oriented in a 5′
to 3′ (leading) direction and the other in a 3′ to 5′ direction (lagging)
◉ Nucleases (Endo and Exo).
Answer: Remove RNA primers
◉ Ligase.
Answer: "Seals" the template and complementary strands together
◉ Single-strand binding (SSB) proteins.