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WorksheetsCell Signaling Review
Total questions: 14
Worksheet time: 11mins
What typically initiates a signal transduction pathway?
The binding of a ligand to a receptor protein
The production of secondary messengers
The release of hormones into the bloodstream
The production of ATP
Which of the following is an example of a receptor involved in signal transduction?
Ligand-gated ion channels
G-protein-coupled receptors
Tyrosine kinase receptors
All of the above
In a phosphorylation cascade, which molecule is often used as a secondary messenger?
ATP
cAMP
DNA
Glucose
Why don't all cells respond to the same signal in signal transduction pathways?
Some cells are not capable of receiving signals
Only target cells have specific receptor proteins for the signal
The ligands can't enter the cells
All cells respond equally to signals
What is a common feature of signal transduction pathways involving G-protein-coupled receptors?
The activation of a G-protein
The direct release of glucose
The binding of DNA to the receptor
The destruction of receptor proteins
I. Response
II. Amplification
III. Reception
IV. Transduction
Which of the following represents the sequence of events in a typical signal transduction pathway?
What type of signaling is shown here?
autocrine (self-signaling)
juxtacrine (direct cell-to-cell contact)
endocrine (long-distance)
paracrine (short distance)
This is an example of
paracrine signalling
endocrine signalling
autocrine signalling
juxtacrine signalling
Identify the structures through which animal cells and plant cells use for direct communication.
Animal cells - plasmodesmata ; Plant cells - gap junctions
Animal cells - neurons ; Plant cells - hormones
Animal cells - gap junctions ; Plant cells - plasmodesmata
Animal cells - hormones ; Plant cells - neurons
What is the function of protein phosphatase in signal transduction pathways?
To synthesize DNA
To deactivate enzymes
To transport ions
To dephosphorylate other proteins
All cells respond to the same ligand with the same response.
True
False
What is the main purpose of a signal transduction pathway?
To break down molecules
To communicate with other cells
To convert a signal into a specific cellular response
To synthesize proteins
What is an example of a disease involving cell signaling problems?
Cancer
Influenza
Asthma
Diabetes
What is an example of a ligand-gated ion channel?
Neurotransmitter receptor
Enzyme linked receptor
G-protein linked receptor
Voltage-gated ion channel
