Question 1

How do the different types of actin-binding proteins relate to the ability of actin to form bundles and networks?

Accepted Answer

A) Proteins promoting bundle formation have one actin-binding site,whereas proteins promoting network formation have two actin-binding sites. 
B) Different types of actin bind different actin-binding proteins to form bundles or networks. 
C) Proteins that promote bundle formation bind ADP-actin,whereas proteins that promote network formation bind ATP-actin. 
D) Proteins promoting bundle formation tend to be short and inflexible,whereas proteins that promote network formation tend to be longer and more flexible. 
A) Proteins promoting bundle formation have one actin-binding site,whereas proteins promoting network formation have two actin-binding sites. 
B) Different types of actin bind different actin-binding proteins to form bundles or networks. 
C) Proteins that promote bundle formation bind ADP-actin,whereas proteins that promote network formation bind ATP-actin. 
D) Proteins promoting bundle formation tend to be short and inflexible,whereas proteins that promote network formation tend to be longer and more flexible.

Question 2

Actin-binding proteins that generate actin filament bundles:

Accepted Answer

A) are long and flexible. 
B) bind only to the ends of actin filaments. 
C) can also bundle microtubules. 
D) are short and inflexible. 
A) are long and flexible. 
B) bind only to the ends of actin filaments. 
C) can also bundle microtubules. 
D) are short and inflexible.

Question 3

How do cells grip the substrate to generate locomotion?

Accepted Answer

Locomoting cells use focal adhesions to

Question 4

What is the function of thymosin β₄?

Accepted Answer

Thymosin β₄ is a G-actin sequestering pr

Question 5

Many actin cross-linking proteins contain:

Accepted Answer

A) an ATP-binding cleft. 
B) a head domain. 
C) a CH domain. 
D) only one actin-binding site. 
A) an ATP-binding cleft. 
B) a head domain. 
C) a CH domain. 
D) only one actin-binding site.

Question 6

Gelsolin is activated by:

Accepted Answer

A) ATP binding. 
B) phosphorylation. 
C) Ca²⁺ binding. 
D) dephosphorylation. 
A) ATP binding. 
B) phosphorylation. 
C) Ca²⁺ binding. 
D) dephosphorylation.

How do the different types of actin-binding proteins relate to the ability of actin to form bundles and networks?

Actin-binding proteins that generate actin filament bundles:

How do cells grip the substrate to generate locomotion?

What is the function of thymosin β₄?

Many actin cross-linking proteins contain:

Gelsolin is activated by:

Chemical Foundations

Molecular Genetic Techniques

Protein Structure and Function

Culturing and Visualizing Cells

Fundamental Molecular Genetic Mechanisms

Bio-membrane Structure

Genes Genomics and Chromosomes

Transcriptional Control of Gene Expression

Post-Transcriptional Gene Control

Transmembrane Transport of Ions and Small Molecules

Cellular Energetics

Moving Proteins Into Membranes and Organelles

Vesicular Traffic, Secretion, and Endocytosis

Signal Transduction and G-Protein Coupled Receptors

Signaling Pathways That Control Gene Activity

Cell Organization and Movement II: Microtubules and Intermediate Filaments

Regulating the Eukaryotic Cell Cycle

Integrating Cells Into Tissues

Cell Birth, Lineage, and Death

Nerve Cells

Immunology

Cancer

Filters

Exam 16: Cell Organization and Movement I: Microfilaments

How do the different types of actin-binding proteins relate to the ability of actin to form bundles and networks?

Actin-binding proteins that generate actin filament bundles:

How do cells grip the substrate to generate locomotion?

What is the function of thymosin β₄?

Many actin cross-linking proteins contain:

Gelsolin is activated by:

Chemical Foundations

Molecular Genetic Techniques

Protein Structure and Function

Culturing and Visualizing Cells

Fundamental Molecular Genetic Mechanisms

Bio-membrane Structure

Genes Genomics and Chromosomes

Transcriptional Control of Gene Expression

Post-Transcriptional Gene Control

Transmembrane Transport of Ions and Small Molecules

Cellular Energetics

Moving Proteins Into Membranes and Organelles

Vesicular Traffic, Secretion, and Endocytosis

Signal Transduction and G-Protein Coupled Receptors

Signaling Pathways That Control Gene Activity

Cell Organization and Movement II: Microtubules and Intermediate Filaments

Regulating the Eukaryotic Cell Cycle

Integrating Cells Into Tissues

Cell Birth, Lineage, and Death

Nerve Cells

Immunology

Cancer

Filters