Question 1

Which of the following supports the ligand-mediated model of receptor dimerization?

Accepted Answer

A) Some growth and differentiation factors like PDGF or CSF-1 are composed of two similar or identical disulfide-linked subunits,each of which has a binding site for a receptor. 
B) Ligands have been found to be small proteins. 
C) Ligands have been found to be steroid hormones. 
D) Ligands were found to bind to each other 
E) Receptors have been shown to have multiple binding sites for ligands. 
A) Some growth and differentiation factors like PDGF or CSF-1 are composed of two similar or identical disulfide-linked subunits,each of which has a binding site for a receptor. 
B) Ligands have been found to be small proteins. 
C) Ligands have been found to be steroid hormones. 
D) Ligands were found to bind to each other 
E) Receptors have been shown to have multiple binding sites for ligands.

Question 2

________ is a small protein that is linked covalently to other proteins,thereby marking those proteins for internalization or degradation.

Accepted Answer

A) Chaperonin 
B) Ubiquitin 
C) Proinsulin 
D) Transcriptin 
E) Tubulin 
A) Chaperonin 
B) Ubiquitin 
C) Proinsulin 
D) Transcriptin 
E) Tubulin

Question 3

The passage of signals back and forth between different pathways is referred to as _________.

Accepted Answer

A) divergence 
B) convergence 
C) crosstalk 
D) transvergence 
E) coherence 
A) divergence 
B) convergence 
C) crosstalk 
D) transvergence 
E) coherence

Question 4

Which of the following contains an SH2 domain together with a tyrosine phosphorylation site that can act as a binding site for the SH2 domain of an identical molecule leading to dimerization?

Accepted Answer

A) adaptor proteins 
B) docking proteins 
C) transcription factors 
D) enzymes 
E) All of these are correct. 
A) adaptor proteins 
B) docking proteins 
C) transcription factors 
D) enzymes 
E) All of these are correct.

Question 5

Bcl-2 acts as a(n)________ by promoting ___________.

Accepted Answer

A) oncogene,cell division 
B) haplogene,survival of potential cancer cells that would otherwise die by apoptosis 
C) oncogene,survival of potential cancer cells that would otherwise die by apoptosis 
D) cancer gene,survival of potential cancer cells that would otherwise die by apoptosis 
E) haplogene,cell division 
A) oncogene,cell division 
B) haplogene,survival of potential cancer cells that would otherwise die by apoptosis 
C) oncogene,survival of potential cancer cells that would otherwise die by apoptosis 
D) cancer gene,survival of potential cancer cells that would otherwise die by apoptosis 
E) haplogene,cell division

Which of the following supports the ligand-mediated model of receptor dimerization?

________ is a small protein that is linked covalently to other proteins,thereby marking those proteins for internalization or degradation.

The passage of signals back and forth between different pathways is referred to as _________.

Which of the following contains an SH2 domain together with a tyrosine phosphorylation site that can act as a binding site for the SH2 domain of an identical molecule leading to dimerization?

Bcl-2 acts as a(n) by promoting ___.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 15: Cell Signaling and Signal Transduction: Communication Between Cells

Which of the following supports the ligand-mediated model of receptor dimerization?

________ is a small protein that is linked covalently to other proteins,thereby marking those proteins for internalization or degradation.

The passage of signals back and forth between different pathways is referred to as _________.

Which of the following contains an SH2 domain together with a tyrosine phosphorylation site that can act as a binding site for the SH2 domain of an identical molecule leading to dimerization?

Bcl-2 acts as a(n)________ by promoting ___________.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Bcl-2 acts as a(n) by promoting ___.