Cell Communication and Signaling
Biology ⇒ Cell Biology
Cell Communication and Signaling starts at 10 and continues till grade 12.
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See sample questions for grade 11
A scientist adds a drug that blocks G protein activation in a cell. Predict the effect on GPCR signaling.
A student observes that a hormone binds to a receptor inside the cell. What type of hormone is this likely to be?
Describe how a signal can be terminated in a cell signaling pathway.
Describe the role of scaffolding proteins in cell signaling.
Describe the three main stages of cell signaling.
Describe what happens during the response stage of cell signaling.
Explain the difference between a hydrophilic and a hydrophobic signaling molecule in terms of receptor location.
Explain the importance of feedback regulation in cell signaling pathways.
Explain why signal amplification is important in cell signaling pathways.
Explain why specificity is important in cell signaling.
What is the main function of a receptor protein in cell signaling?
What is the role of protein kinases in signal transduction pathways?
A cell is exposed to two different signaling molecules at the same time. One signal activates a pathway that increases calcium ion (Ca2+) concentration, while the other activates a pathway that decreases cAMP levels. Explain how the cell can integrate these signals to produce a coordinated response.
A mutation causes a receptor tyrosine kinase (RTK) to remain permanently active, even in the absence of its ligand. Predict and explain the possible consequences for the cell.
A researcher observes that a cell responds to a signaling molecule by increasing the transcription of a specific gene. Which stage of cell signaling is directly responsible for this change in gene expression?
Describe how the structure of a G protein-coupled receptor (GPCR) enables it to transmit signals across the plasma membrane.
Explain how the process of cross-talk between two different signaling pathways can influence the final cellular response.
