IB Bio HL: D

purpose of DNA replication

Reproduction and Growth and tissue replacement

Why is DNA replication is needed for reproduction?

offspring need copies of the base sequences of their parents, so parents must replicate their DNA to reproduce

Why is DNA Replication important for Growth and tissue replacement in multicellular organisms?

each cell in a plant, animal or other multicellular organism needs a full set of the organism’s base sequences. This means that before a cell divides into two daughter cells, it must replicate all of its DNA. Cell division is needed for growth and to replace cells in tissues where they have been lost—-for example, cells worn away from the skin surface

Messelsohn-Stahl experiment

Meaning of semi-conservative in relation to DNA replication

When replication is complete, there are 2 DNA molecules, both composed of an original strand and a newly synthesized strand