WorksheetsMitosis
Total questions: 14
Worksheet time: 13mins
What happens in the G1-phase of the cell cycle? (First Gap)
The cell decides to Begin replication, the cell grows and replicates organelles
DNA replication occurs
More growth occurs here to prepare for mitosis
Parent cell divides and produces 2 new daughter cells.
What happens in S-phase? (Synthesis)
The cell decides to Begin replication, the cell grows and replicates organelles
DNA replication occurs
More growth occurs here to prepare for mitosis
Parent cell divides and produces 2 new daughter cells.
What happens in the G2-phase of the cell cycle? (Second Gap)
The cell decides to Begin replication, the cell grows and replicates organelles
DNA replication occurs
More growth occurs here to prepare for mitosis
Parent cell divides and produces 2 new daughter cells.
What happens in the M-phase of the cell cycle? (Mitosis)
The cell decides to Begin replication, the cell grows and replicates organelles
DNA replication occurs
More growth occurs here to prepare for mitosis
Parent cell divides and produces 2 new daughter cells.
What is the G0 phase?
What role do cyclins play in the cell cycle?
Only present during their associated part of the cell cycle.
Always present, but only activated when bound to the cyclin
they are dependent on
Signal Cascades
regulate the cell cycle
How would you describe cyclin-dependent kinases?
Only occurs in the first three stages of the cell cylce
Regulates the cell cycle and is Dependent on Cyclin
CDK + Cyclin= M phase promoting factor (MPF)
Always present, but only activated when bound to the cyclin
they are dependent on (Occurs in EVERY PHASE)
Which of the following does NOT happen in the G1 checkpoint?
The cell checks if the DNA is damaged
The cell checks if it is large enough
The cell checks if DNA was replicated correctly
The cell checks if it has sufficient nutrients
Which of the following does NOT happen in the G2 checkpoint?
The cell checks if the RNA is in the correct sequence
The cell checks if it is large enough and growing correctly
The cell checks if DNA was replicated correctly
The cell checks if it has sufficient nutrients
How is the cyclin-CDK activity affected by the cell cycle checkpoints?
IF a mutation happens which makes RAS always active, then it cannot be controlled by growth factors which leads to unregulated cell replication.
Cyclin-CDK is able to occur even if something goes wrong. This allows it to move through the cell cycle.
Cyclin-CDK is unable to occur if something goes wrong in the cell, which prevents it from moving through the cell cycle. If repair happens, the cell can continue
If repair happens, the cell will still be unable to continue
The role of P53 is to ______
Ras is a protein that...
Has a controlling role in the cell cycle
Is only turned on when NEEDED
When Ras is defective, it constantly sends signals that trigger mitosis & cell division (of an unhealthy cell)
Is a very efficient cancer suppressor
Rank the following from first to last in the cell cycle:
G1, G2, S, and M phases.
(a)
Haploid:
ONE complete set of chromosomes (1n)
TWO complete sets of chromones (2n
Contains more than two sets of chromosomes
Contains NO chromosomes
