Why does replication occur?

Why does replication occur?

• A. To produce RNA primers
• B. To degrade DNA
• C. To ensure daughter cells have an identical copy of DNA
• D. To increase cell size

Answer: (C)

The main goal of replication is to copy the organism’s genetic material so that when the cell divides, each daughter cell receives an identical set of genes. This duplication is semi-conservative, meaning each new DNA molecule contains one original strand and one newly synthesized strand, preserving genetic information across generations. Enzymes like helicase unwind the double helix, primase lays down RNA primers to start synthesis, and DNA polymerase builds the new strands in the 5' to 3' direction, with ligase sealing any gaps. This high fidelity ensures that the daughter cells have the same genetic blueprint, which is essential for proper growth, development, and function. The other options don’t describe why replication occurs: RNA primers are part of the process, not the purpose; degrading DNA would eliminate genetic information; and increasing cell size is not a function of DNA replication.

The main goal of replication is to copy the organism’s genetic material so that when the cell divides, each daughter cell receives an identical set of genes. This duplication is semi-conservative, meaning each new DNA molecule contains one original strand and one newly synthesized strand, preserving genetic information across generations. Enzymes like helicase unwind the double helix, primase lays down RNA primers to start synthesis, and DNA polymerase builds the new strands in the 5' to 3' direction, with ligase sealing any gaps. This high fidelity ensures that the daughter cells have the same genetic blueprint, which is essential for proper growth, development, and function. The other options don’t describe why replication occurs: RNA primers are part of the process, not the purpose; degrading DNA would eliminate genetic information; and increasing cell size is not a function of DNA replication.