DNA replication/ State of DNA

[SaintJude]

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DNA replication occurs during S-phase of the cell cycle & results in the duplication of chromosomes. What must occur simultaneously in DNA replication?

A. The 30nm fiber formation
B. Segregation of chromosomes
C. Replication of nucleosomes
D. Kinetochore formation

If lost, this helped me understand:

http://upload.wikimedia.org/wikipedia/commons/4/4b/Chromatin_Structures.png

For those who got it correct, how did you know when the kinetochore was formed?

Answer is hidden in white, so highlight: C

 

[qtsjoe]

DNA replication occurs during S-phase of the cell cycle & results in the duplication of chromosomes. What must occur simultaneously in DNA replication?

A. The 30nm fiber formation
B. Segregation of chromosomes
C. Replication of nucleosomes
D. Kinetochore formation

I think the key to solving the question lies in the wording simulataneously

A) 30nm fiber formation is something that occurs to the strand of DNA after it has been replicated
B) I'd assume segregation of chromosomes is the movement of chromosomes to it's daughter cells-can't be true because this would have occured afte S phase-end of mitosis.
D)Kinetochore Formation-> occurs during mitosis which is after interphase (G0 G1 S G2-> then interphase.)

Hope this helps...👍

 

[MedPR]

I knew it wasn't B or D, but I had no idea about A or C. To be honest, I don't even know what the 30nm fiber or a nucleosome is. I suppose I should look that up.