Vocabulary matching -dna replication

 DNA Replication. is the biological process of producing two identical replicas of DNA from one original DNA molecule. 
-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. 
The replication fork is the area where the replicationof DNA will actually take place. 
The 5' and 3' mean "five prime" and "three prime", which indicate the carbon numbers in the DNA's sugar backbone.
Semiconservative replication would produce two copies that each contained one of the original strands and one new strand. 
 Helicases are often used to separate strands of a DNA double helix or a self-annealed RNA molecule using the energy from ATP hydrolysis

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.