Multiple Choice
In the context of semiconservative DNA replication, what does it mean that DNA replication is semiconservative?
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8. DNA Replication
Semiconservative Replication
Multiple Choice
In the context of semiconservative DNA replication, what does it mean that DNA replication is semiconservative?
A
Each daughter DNA molecule contains one original (parental) strand and one newly synthesized strand.
B
Each daughter DNA molecule contains two original (parental) strands and no newly synthesized strands.
C
Each daughter DNA molecule contains two newly synthesized strands and none of the original strands.
D
The parental DNA molecule remains intact, and a completely separate copy is produced with two newly synthesized strands.
Verified step by step guidance1
Understand the concept of DNA replication: DNA replication is the process by which a cell copies its DNA before cell division, ensuring each daughter cell receives a complete set of genetic information.
Recall the three models of DNA replication proposed historically: conservative, semiconservative, and dispersive replication.
Define semiconservative replication: In this model, each of the two strands of the original DNA molecule serves as a template for the synthesis of a new complementary strand.
Explain the outcome of semiconservative replication: Each daughter DNA molecule consists of one original (parental) strand and one newly synthesized strand, preserving half of the original molecule in each copy.
Contrast with other models: Conservative replication would produce one molecule with both original strands and one with both new strands, while dispersive replication would produce strands with interspersed old and new DNA segments.
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