BS 161 RIQ 16-17 EXAM QUESTIONS AND

BS 161 RIQ 16-17 EXAM QUESTIONS AND

ANSWERS 100% score (Newest 2025) Give two reasons why cellular communication is important - Correct Answers ✅Cells in tissues need to coordinate with each other Cells need to monitor the surrounding environment

Give examples of how cells might respond to signals: -

Correct Answers ✅Change metabolism by activating or inactivating enzymes Change gene expression by starting or stopping transcription Divide- initiate processes for cell division, including DNA replication Others - change shape, secrete signals, engulf materials from the surrounding environment, die List three types of molecules commonly found in cellular communication pathways. - Correct Answers ✅Ligand - the signal Receptor - protein that binds to the ligand 1 / 3

BS 161 RIQ 16-17 EXAM QUESTIONS AND

ANSWERS 100% score (Newest 2025)

Signal transduction molecules: molecules inside the cell that

communicate the presence of activated receptor at the cell surface Describe two features that all receptors have in common - Correct Answers ✅Interact with a specific ligand Change shape after binding to the ligand List the four types of receptors and give one key feature of each. - Correct Answers ✅G protein-coupled receptors - active receptor activates a G protein Receptor kinase - two inactive monomers form an active dimer when bound to the ligand Ligand-gated ion channel - binding of ligand opens a channel for ions Intracellular receptor - only receptor not at the cell surface, binds to ligands in the cytosol or nucleus what changes when these proteins become active? - Correct Answers ✅the proteins change shape 2 / 3

BS 161 RIQ 16-17 EXAM QUESTIONS AND

ANSWERS 100% score (Newest 2025) what is the next step after signal transduction? - Correct Answers ✅cellular response how would you show termination? - Correct Answers ✅ligand not bound to the receptor, proteins in their original inactive shapes and not grouped together If the same signal causes a different response in two different cells, what proteins might be different between the two cells?

• Correct Answers ✅the signal transduction proteins might

be different Why might a cell not respond to a signal? - Correct Answers ✅The cell may not have a receptor that can bind to the ligand What causes a protein to change shape? - Correct Answers ✅Binding to other molecules Why is a change in shape important for cell communication? - Correct Answers ✅Allows proteins to interact with new molecules How do proteins return to their original shape? - Correct Answers ✅they unbind (dissociate) from molecules

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