MICR 3230 Exam Pre Questions with All
Solved Solutions 2026-2027 Updated.
Receptor-ligand binding occurs via multiple ___________ bonds. - Answer noncovalent
Each individual bond may be weak but in total they deliver a strong _______ _________. -
Answer binding avidity
_________________ (___) is a measure of strength of ligand binding. - Answer Dissociation
Constant (Kd)
What are examples of bonds& interactions that can occur between a receptor and ligand? -
Answer - Hydrogen bonds
- Ionic bonds
- Van der Waals interactions
- hydrophobic interactions
Receptor-ligand interactions may be _______________. - Answer multivalent
What does multivalent mean? - Answer having more than one binding site for an antibody or
antigen
Multivalency increases ________ of interactions. - Answer avidity
Individual interactions have an _________ (the strength of an individual bond). - Answer
affinity
Affinity - Answer the strength of an individual bond
Avidity - Answer the strength of multiple bonds combined
An interaction can have a weak _______ but overall strong _______. - Answer affinity, avidity
Univalent Interaction - Answer - single receptors bind to single ligands
Multivalent Interaction - Answer - multiple receptors bind to multiple ligands
,Ligand-receptor binding induces ___________ ________ in the receptor. - Answer molcular
change
What types of molecular changes can ligand-receptor binding induce in the receptor? - Answer
- conformational
- dimerization/clustering
- location in membrane
- covalent modification
Receptor alterations induce cascades of _____________ events. - Answer intracellular
What cascades do receptor alterations trigger? - Answer - activation of enzymes
- changes in intracellular location of molecules
Aggregation (due to ligand binding) ____________ ligand binding Kd. - Answer enhances
Cell-cell interactions rely on a _________ ________ to maintain contact for long periods of time.
- Answer binding affinity
Extended contact facilitates ______ _____________ and exchange of ___________. - Answer
signal transduction, cytokines
Cytoskeletal reorganization - Answer may occur upon extended binding
Immune receptors have... - Answer immunoglobin domains
Immune receptors can be __________, __________ or __________. - Answer
transmembrane, cytosolic or secreted.
B cell receptor (BCR) - Answer contains an antibody of defined specificity
T cel receptor (TCR) - Answer specificity is for peptides derived from APC's degraded antigen
presented on MHC molecules.
CD4 and CD8 are T cell ________________ that define different subsets of _____ _______. -
Answer co-receptors, Tcell function
, Recombination is directed by a _________ __________ . - Answer signal sequence
Dissociation constant refers to: - Answer measure of strength of ligand binding to a receptor
Avidity refers to: - Answer combined strength of binding of multiple receptors
Ligand-receptor binding induces which molecular changes in the receptor:
A)Conformational changes
B)Dimerization/clustering
C)Location in the membrane
D)Covalent modification
E)All of the above - Answer A)Conformational changes
B)Dimerization/clustering
C)Location in the membrane
D)Covalent modification
*E)All of the above
An immune receptor lacking a C-terminus transmembrane segment is: - Answer secreted as an
antibody
B cells use recombination of gene segments to ... - Answer create different possible antibodies
Recombination Signal Sequences (RSS) - Answer flank each antibody gene segment
The 12/23 Rule - Answer States that a 12 bp RSS must pair with a 23 bp RSS for recombination
to occur.
Why do we need recombination? - Answer to recognize diff antigens
Why the 12/23 rule? - Answer to regulate combinations that are formed.
Gene segments are joined by the ______ ______________. - Answer RAG1/2 recombinase
RAG - Answer Recombination activating gene
Solved Solutions 2026-2027 Updated.
Receptor-ligand binding occurs via multiple ___________ bonds. - Answer noncovalent
Each individual bond may be weak but in total they deliver a strong _______ _________. -
Answer binding avidity
_________________ (___) is a measure of strength of ligand binding. - Answer Dissociation
Constant (Kd)
What are examples of bonds& interactions that can occur between a receptor and ligand? -
Answer - Hydrogen bonds
- Ionic bonds
- Van der Waals interactions
- hydrophobic interactions
Receptor-ligand interactions may be _______________. - Answer multivalent
What does multivalent mean? - Answer having more than one binding site for an antibody or
antigen
Multivalency increases ________ of interactions. - Answer avidity
Individual interactions have an _________ (the strength of an individual bond). - Answer
affinity
Affinity - Answer the strength of an individual bond
Avidity - Answer the strength of multiple bonds combined
An interaction can have a weak _______ but overall strong _______. - Answer affinity, avidity
Univalent Interaction - Answer - single receptors bind to single ligands
Multivalent Interaction - Answer - multiple receptors bind to multiple ligands
,Ligand-receptor binding induces ___________ ________ in the receptor. - Answer molcular
change
What types of molecular changes can ligand-receptor binding induce in the receptor? - Answer
- conformational
- dimerization/clustering
- location in membrane
- covalent modification
Receptor alterations induce cascades of _____________ events. - Answer intracellular
What cascades do receptor alterations trigger? - Answer - activation of enzymes
- changes in intracellular location of molecules
Aggregation (due to ligand binding) ____________ ligand binding Kd. - Answer enhances
Cell-cell interactions rely on a _________ ________ to maintain contact for long periods of time.
- Answer binding affinity
Extended contact facilitates ______ _____________ and exchange of ___________. - Answer
signal transduction, cytokines
Cytoskeletal reorganization - Answer may occur upon extended binding
Immune receptors have... - Answer immunoglobin domains
Immune receptors can be __________, __________ or __________. - Answer
transmembrane, cytosolic or secreted.
B cell receptor (BCR) - Answer contains an antibody of defined specificity
T cel receptor (TCR) - Answer specificity is for peptides derived from APC's degraded antigen
presented on MHC molecules.
CD4 and CD8 are T cell ________________ that define different subsets of _____ _______. -
Answer co-receptors, Tcell function
, Recombination is directed by a _________ __________ . - Answer signal sequence
Dissociation constant refers to: - Answer measure of strength of ligand binding to a receptor
Avidity refers to: - Answer combined strength of binding of multiple receptors
Ligand-receptor binding induces which molecular changes in the receptor:
A)Conformational changes
B)Dimerization/clustering
C)Location in the membrane
D)Covalent modification
E)All of the above - Answer A)Conformational changes
B)Dimerization/clustering
C)Location in the membrane
D)Covalent modification
*E)All of the above
An immune receptor lacking a C-terminus transmembrane segment is: - Answer secreted as an
antibody
B cells use recombination of gene segments to ... - Answer create different possible antibodies
Recombination Signal Sequences (RSS) - Answer flank each antibody gene segment
The 12/23 Rule - Answer States that a 12 bp RSS must pair with a 23 bp RSS for recombination
to occur.
Why do we need recombination? - Answer to recognize diff antigens
Why the 12/23 rule? - Answer to regulate combinations that are formed.
Gene segments are joined by the ______ ______________. - Answer RAG1/2 recombinase
RAG - Answer Recombination activating gene
