AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At what point in the cell cycle does DNA replication occur and why?
A
before a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
B
before a cell divides, to ensure that the DNA will fit into the resulting cells
C
during cell division, to ensure that the DNA will fit into the resulting cells
D
after a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
Explanation: 

Detailed explanation-1: -The replication of DNA occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis.

Detailed explanation-2: -S phase is the period during which DNA replication occurs.

Detailed explanation-3: -Before a cell divides, it must first copy (or replicate) its entire genome so that each resulting daughter cell ends up with its own complete genome.

Detailed explanation-4: -S phase : The replication phase is known as the S phase. DNA replication consumes the majority of the cell’s resources. All 46 chromosomes are duplicated in human cells.

Detailed explanation-5: -DNA replicates during interphase. This process provides each new daughter cell with a full complement of genetic material.

There is 1 question to complete.