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Worksheets2/20 Warm up Unit 4
Total questions: 12
Worksheet time: 7mins
Transduction step traditionally amplifies the signal, which of the following are NOT involved with transduction?
secondary messengers
protein modification
phosphorylation cascade
ligands
Describe what occurs when the ligand binds to the receptor.
confirmation change in shape of receptor
phosphorylation of ligand
ligand passes through the membrane
receptor binds additional ligands
Which of the following is the stage where the cell no longer divides?
G0
G1
G2
S
Describe the interaction between cyclin and CdK.
cyclin interacts with CdK to initiate the mitotic phase
cyclin is the precursor to CdK, when synthesized allow for mitosis proceed
cyclin acts as an inhibitor to CdK to wait for all DNA to be synthesized
cyclin binds to CdK to initiate DNA replication
Mitosis results in...
2 identical diploid cells
4 unique diploid cells
2 unique haploid cells
4 identical haploid cells
Plant cells can exchange small soluble compounds with neighboring cells directly through junctions in the cell wall called -
gap junctions
thylakoids
stomata
plasmodesmata
If a medicine works by blocking a secondary messenger, what effect would it have on that cell signaling pathway?
It would increase the response if the pathway
It would trigger the release of more ligands
It would activate the transcription of a desired gene
It would inhibit transduction, thus deactivating the response
Which of the following describes anaphase of mitosis?
Chromatin condenses into chromosomes, and the nuclear membrane is broken down
Sister chromatids are separated and kinetochores begin pulling chromosomes to opposite poles
Spindle fibers attach to centromeres and begin to prepare the movement of sister chromatids towards the cell's equator
Homologous chromosomes are separated and kinetochores begin pulling chromosomes to opposite poles
What would happen is protein phosphatases were defective?
Cancerous cells would take advantage and grow uncontrollably because the cell cycle will shut down.
Gametes would take advantage and grow uncontrollably because the cell cycle cannot shut down.
Gametes would take advantage and grow uncontrollably because the cell cycle will shut down.
Cancerous cells would take advantage and grow uncontrollably because the cell cycle cannot shut down.
Which type of feedback loop would mammals use to maintain a constant body temperature or say 124.6 C?
Homeostatic
Postive
Negative
Isotonic
In mitosis, how much DNA should a daughter cell at the end of cytokinesis have when compared to the original parent cell?
Half the amount
The exact same amount
Double the amount
How are cyclins and CDKs involved with the cell cycle?
Cyclins stop the cell cycle from proceeding
Cyclins and CDKs make up a protein ring used to perform cytokinesis
Cyclins activate CDKs, which perform the work of cell division
CDKs are secreted from cells to trigger division in neighboring cells
