AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What part of the cell cycle does replication occur?
A
S phase
B
Prophase
C
Metaphase
D
G1
Explanation: 

Detailed explanation-1: -M phase (mitosis) is usually followed by cytokinesis. S phase is the period during which DNA replication occurs.

Detailed explanation-2: -S phase. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome. The centrosomes help separate DNA during M phase.

Detailed explanation-3: -DNA replication occurs in the nucleus in eukaryotes, whereas in cytoplasm in prokaryotes.

Detailed explanation-4: -So, S stands for DNA synthesis. After the DNA is copied and there’s a complete extra set of all the genetic material, the cell moves into the G2 stage, where it organizes and condenses the genetic material, or starts to condense the genetic material, and prepares to divide. The next stage is M. M stands for mitosis.

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