MCQ
DNA replication is:
- AConservative
- BNon-conservative
- CSemi-conservative
- DConstitutive
✓
Answer
- Semi-conservative
Explanation:
Watson and Crick figured out a model of two strands of DNA, each one with one strand of parent (or template) DNA and one strand of daughter (or newly-synthesized) DNA.
They called this the semi-conservative model because half of the parent DNA was conserved in each new DNA molecule.
Semiconservative replication describes the mechanism of DNA replication that occurs on multiple origins of replication along the DNA template strand.
This process is known as semi-conservative replication because two copies of the original DNA molecule are produced.
Each copy contains one original strand and one newly-synthesized strand.
Scientists formulated one hypothesis, called the dispersive model, suggesting that DNA only copies itself for short chunks at a time, producing new strands that alternated parent and daughter DNA.
Another hypothesis, called the conservative model, argued that DNA didn't split open at all, but somehow kept the parent strands intact while creating an entirely new and separate copy.
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