Cell Signaling
What are the 3 steps in the signal transduction pathway?
What are reception, transduction, and response
What happens during Cytokinesis?
Cytoplasm is pinched into two nearly equal parts. 2 cells are formed
What is a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes.
What is a Cyclin
DNA exists as chromatin during what phase?
What is interphase
Protein that organizes chromosomes and around which DNA wraps.
What is Histone?
What is a signal molecule that binds to a larger molecule.
What is a ligand
During which stage of the cell cycle does DNA replicate?
What is S stage
How many checkpoints are involved in the regulation of the cell cycle?
What is three
A diploid organism with a total of 22 chromosomes has an n of
What is 11
What is apoptosis?
What is controlled cell death
This is the type of signaling between two neurons in animal cells.
What is synaptic signaling.
Two new nuclei form during this stage of Mitosis.
What is Telophase?
At what checkpoint does the cell check to see if the spindle fibers are attached correctly?
What is the M or Spindle checkpoint
One half of a duplicated chromosome is a __________.
What is a chromatid?
Cells that don't divide go to this step.
What is G0 phase?
What is a series of chemical reactions during cell signaling mediated by enzymes, in which each kinase in turn phosphorylates and activates another?
What is Phosphorylation Cascade
What are the 3 steps of interphase and 5 steps of mitosis in order?
What are G1, S, G2, Prophase, Prometaphase, Metaphase, Anaphase, Telophase.
What causes cancer?
What is uncontrolled cell growth
A diploid organism with n=5 would have this many chromatids in metaphase
What is 20
During cytokinesis, animal cells form a cleavage furrow to divide while plant cells form this.
What is a cell plate
Plant cells in direct contact with each other can diffuse substances through these structures to communicate. What are they?
What are plasmodesmata?
At what point in the cell cycle do the sister chromatids separate?
What is Anaphase
What checkpoint decides whether or not the cell will undergo division or enter to G0 phase?
What is G1 Checkpoint
DNA condenses into chromatids during which phase?
What is prophase
This type of feedback increases the stimulus
What is positive (feedback)