MCQ Questions
Q.1.
A signal transduction pathway is initiated when a _____ binds to a receptor.
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    signal molecule
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    calmodulin
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    ligand
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    G-protein-linked
Q.2.
The cleavage of glycogen by glycogen phosphorylase releases ______.galactose-1-phosphatenothing: glycogenphosphorylase cannotcleave glycogenfructose-1-phosphatecelluloseglucose-1-phosphate
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    1. Cortisol passes through the plasma membrane into the cytoplasm2. Cortisol-receptor complex forms in the cytoplasm3. Cortisol-receptor complex enters the nucleus where it bind to genes4. Cortisol-receptor complex acts as a transcription factor5. The transcribed mRNA is translated into a specific protien
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    By binding to DNA it triggers the transcription of a specific gene.
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    7. glucose-1-phosphate**glycogen is a polysaccharide compose of glucose monomers
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    amplification**By activating many other molecules the initial signal is amplified
Q.3.
Part completeA protein kinase activating many other protein kinases is an example of _____.
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    Phospholipase C ... IP3 .... Ca2**Phospholipase C cleaves IP3 from a membrane protein, and IP3 then binds to a calcium channel on the ER.
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    transduction**Transduction is the 2nd of the 3 stages of cell signaling
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    amplification**By activating many other molecules the initial signal is amplified
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    By binding to DNA it triggers the transcription of a specific gene.
Q.4.
Calcium ions that act as second messengers are stored in _____.
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    G-protein-linked receptor
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    transduction**Transduction is the 2nd of the 3 stages of cell signaling
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    D
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    endoplasmic reticula** The ER stores calcium ions
Q.5.
Part complete_____ catalyzes the production of _____, which then opens an ion channel that releases _____ into the cell's cytoplasm.
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    Phospholipase C ... IP3 .... Ca2**Phospholipase C cleaves IP3 from a membrane protein, and IP3 then binds to a calcium channel on the ER.
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    By binding to DNA it triggers the transcription of a specific gene.
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    amplification**By activating many other molecules the initial signal is amplified
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    1. Cortisol passes through the plasma membrane into the cytoplasm2. Cortisol-receptor complex forms in the cytoplasm3. Cortisol-receptor complex enters the nucleus where it bind to genes4. Cortisol-receptor complex acts as a transcription factor5. The transcribed mRNA is translated into a specific protien
Q.6.
The process by which a signal is converted to a specific cellular response involves three stages:reception of a signaling moleculetransduction of the signalresponse to the signal
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    7. glucose-1-phosphate**glycogen is a polysaccharide compose of glucose monomers
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    G-protein-linked
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    1. Cortisol passes through the plasma membrane into the cytoplasm2. Cortisol-receptor complex forms in the cytoplasm3. Cortisol-receptor complex enters the nucleus where it bind to genes4. Cortisol-receptor complex acts as a transcription factor5. The transcribed mRNA is translated into a specific protien
  • 0%
    Phospholipase C ... IP3 .... Ca2**Phospholipase C cleaves IP3 from a membrane protein, and IP3 then binds to a calcium channel on the ER.
Q.7.
A signal molecule is also known as a(n) _____.
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    signal molecule
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    ligand
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    Cyclic AMP binds to calmodulin.
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    calmodulin
Q.8.
Part completeWhat role does a transcription factor play in a signal transduction pathway?
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    Phospholipase C ... IP3 .... Ca2**Phospholipase C cleaves IP3 from a membrane protein, and IP3 then binds to a calcium channel on the ER.
  • 0%
    amplification**By activating many other molecules the initial signal is amplified
  • 0%
    By binding to DNA it triggers the transcription of a specific gene.
  • 0%
    transduction**Transduction is the 2nd of the 3 stages of cell signaling