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WorksheetsAP Biology Unit 4 review
Total questions: 16
Worksheet time: 9mins
What are the three parts of signal transduction pathway?
reception, transduction, response
confirmation, transduction, transcription
reception, amplification, transcription
confirmation, amplification, response
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 NOT a response by the cell from a signal transduction pathway?
cell growth
gene expression
secretion of molecules
all of the above are responses
Which of the following is NOT a stage of the cell cycle?
interphase
cytokinesis
mitosis
apoptosis
Which of the following is the stage where the cell no longer divides?
G0
G1
G2
S
Which of the following describes the order of the steps in mitosis?
metaphase, telophase, anaphase, prophase
prophase, metaphase, anaphase, telophase
telophase, anaphase, metaphase, prophase
prophase, anaphase, metaphase, telophase
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
Glucagon causes the breakdown of stored glycogen into glucose for cells. What conditions would trigger the release of glucagon?
High blood sugar
Low blood pH
High heart rate
Low cellular ATP concentration
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?
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 moving sister chromatids towards the cell's equator
Chromosomes decondense and two nuclei form within the cell
What is the end result of mitosis?
An undifferentiated stem cell
4 genetically unique haploid cells
2 genetically identical diploid cells
2 genetically unique daughter cells
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
