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Cell Cycle Phases

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Questions and Answers

What is the percentage of time spent in mitosis phase for mammalian cells?

20-30%

3-5% (correct)

10-15%

1-2%

What is the function of the G1 phase in the cell cycle?

Cells enter a quiescent state

DNA synthesis occurs

Cells continue to grow and prepare for mitosis

Cells prepare for DNA replication and growth (correct)

What is the main function of kinetochore microtubules?

Forming the asters at each pole

Polar microtubules interacting with microtubules from the opposite pole

Attaching to the centromere of the chromosomes (correct)

Interacting with proteins lining the plasma membrane

What is the function of astral microtubules during mitosis?

Reaching out to the negative center and binding to membrane proteins Signup and view all the answers

What is the main difference between G0 and G1 phases?

G0 is a quiescent state, while G1 prepares for DNA replication Signup and view all the answers

What is the function of the synthesis phase in the cell cycle?

DNA synthesis occurs, resulting in the replication of the genome Signup and view all the answers

What happens during the G1 phase of the cell cycle?

Cells prepare for DNA replication and growth Signup and view all the answers

What is the main function of microtubules during mitosis?

To facilitate the alignment and segregation of chromosomes Signup and view all the answers

Which type of microtubules interacts with microtubules from the opposite pole of the cell?

Polar microtubules Signup and view all the answers

What is the role of crosslink proteins during mitosis?

To facilitate the alignment and segregation of chromosomes Signup and view all the answers

What is the primary function of the G2 phase?

To prepare cells for mitosis Signup and view all the answers

What is the relationship between the plus end and minus end of microtubules during mitosis?

The plus end is attached to the spindle pole, and the minus end is attached to the kinetochore Signup and view all the answers

What is the purpose of the Mitotic Index?

To measure the percentage of time spent in mitosis phase Signup and view all the answers

What is the primary function of kinetochores during mitosis?

To attach to the centromere of the chromosomes Signup and view all the answers

What is the purpose of the quiescent state in the G0 phase?

To allow cells to enter a state of dormancy Signup and view all the answers