WorksheetsSignal Transduction
Total questions: 15
Worksheet time: 15mins
What is the signaling molecule & where does it bind?
Ligand; Enzyme
Ligand; Receptor
Substrate; Enzyme
Substrate; Receptor
All cells respond to the same ligand with the same response.
True
False
Which number represents the stimulus?
1
2
3
4
What is the function of receptors
respond to the stimulus
learning by repetition
learned by being tricked
keep a balance between internal/external
During transduction a protein kinase changes confirmation (shape) when
It is phosporylated
before the ligand binds
phosphorylase enzyme activates it
during reception
Signal transductions pathways have multiple step which allows for
less ATP to be used
amplification
a longer response
different responses at once
A mutation in the receptor protein will
change the cells ability to respond to the signal
allow for a different cellular response
cause multiple cellular responses
make no change for the cell
What is the signaling molecule called?
Repressor
Activator
ligand
enhancer
Calcium (Ca+) is released from the ER which allows for muscular contractions. What receptor mechanism is used to release the Ca+?
Simple diffusion
active transport
gated ion channel
ion channel
This receptor leads to a change in the distribution of ion
Receptor tyrosine kinase
G protein-coupled receptors
intracellular receptors
ligand-gated ion channels
When estrogen is released it affects the cell that releases it, nearby cells and cells all over the body. This is an example of
paracrine signaling
autocrine signaling
endocrine signaling
all of these
When estrogen is released only a small amount of cells are affected because
non target cells go through apoptosis
only target cells are exposed to the signal
it is unable to enter non target cells
only target cells have the receptor
Which of the following is a key component of a signal transduction pathway?
A) DNA polymerase
B) Protein kinase
C) Ribosome
D) RNA polymerase
In a signal transduction pathway, what role does a second messenger play?
A) It directly binds to the DNA to initiate transcription
B) It amplifies the signal from the receptor
C) It degrades the signaling molecule
D) It transports the signal across the cell membrane
Which of the following best describes the process of signal amplification in a signal transduction pathway?
A) A single signaling molecule activates multiple downstream proteins
B) A signaling molecule is degraded to prevent overactivation
C) The signal is confined to a single cell
D) The signal is transmitted without any change in intensity
