Why is the proportion of actin within filaments in cells smaller than would be predicted by in vitro experiments?

Q: Which of the following families of actin-binding proteins promote actin filament polymerization?…

A: Actin filaments are made up of a long spiral chain of similar actin proteins. Actin filaments, like…

Q: What is not a similarity between motility of cilia/flagella and skeletal muscle? Group of answer…

A: In most flagella and motile cilia, there are 9 pairs of microtubules arranged in a circle, along…

Q: What would be the consequences of actin filament assembly/disassembly if a mutation prevented actins…

A: Actin belongs to the globular family of proteins that forms microfilaments present in eukaryotic…

Q: Describe the mechanisms by which microfilaments assemble.

A: The cytoskeleton is a network of protein filaments that provides structural support, shape, and…

Q: ATP within actin subunits is hydrolyzed after assembly into a filament but before disassembly from…

A: During the lifespan of an F-actin filament, most subunits hydrolyze a single molecule of ATP to ADP.

Q: Describe the features of the Sliding Filament Mechanism?

A: The cardiac muscle tissues and the smooth muscle tissues of the human are involuntary in nature. The…

Q: Very briefly, explain how increased cytoplasmic IP3 levels can then increase cytoplasmic calcium…

A: A messenger in signaling is a molecule that carries information between cells or within cells to…

Q: What could be an example of in vitro experiment to identify cytoskeleton accessory proteins?

A: Cytoskeleton is the part of a cell which provides structural support to the cell and plays roles in…

Q: n statement is not true about the intermediate filaments? atin filaments present in the muscle cells…

A: Vimentin intermediate filaments are generally present in mesenchymal cells. Vimentin is a major…

Q: Predict which fractions will contain actin and which will contain myosin, and predict the degree of…

A: All types of muscle tissue contain actin and myosin. Muscle contractions and movements are generated…

Q: Certain multi-headed myosins bind cooperatively to actin filaments. The binding interaction is…

A: As seen in the graph, when one aminoacid asp residue changes into leucine amino acid in eachs…

Q: you discover that myoglobin has an isoelectric point of 6.8 and chymotrypsin has an isoelectric…

A: Isoelectric point (pI) of a protein is the pH at which the net charge of the protein is 0. When pH…

Q: What are the difference between actin and myosin.

A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…

Q: Describe a negative feedback mechanism for controlling a rising cytosolic Ca2+ concentration in…

A: Numerous metabolic reactions occur in a cell. These reactions may require an enzyme catalyst. The…

Q: Identify the structural makeup of actin filaments, intermediatefilaments, and microtubules

A: Introduction  Our body is formed of various cells. These large number of cells are arranged in a…

Q: Illustrate the features of Actin filaments?

A: Actin filaments are microfilaments. It is made up of G-actin. It is a cytoskeletal protein and the…

Q: Explain the basis for coiling of alpha-helices in the tail of myosin and its relationship to the…

A: The alpha-helices are considered the secondary structure of proteins, it is a rod-like structure…

Q: Write the difference between Actin and Myosin.

A: The muscles are made up of proteins called as actin and myosin. These two proteins are involved in…

Q: Explain the term The sliding-filament assayis used to detect myosin-powered movement.

A: The sliding filament theory was developed to understand the process of muscle contraction. When…

Q: List the steps of collagen assembly and include the location of each step

A: Collagen is the most abundant protein in the body. It has significant role in blood clotting,…

Q: Define what is  intermediate filament ?

A: The term intermediate filament refers to the protein structures that serve as the cytoskeleton and…

Q: Actin filaments, microtubules, and bacterial flagella are all built from small subunits. Describe…

A: Introduction: Actin monomers meet up to frame actin filaments. It is also known as F-actin and has a…

Q: There are no known motor proteins that move along intermediate filaments, in contrast to the variety…

A: The cytoskeleton does the mechanical support, motility and maintenance of the cellular structure in…

Q: If the graph represents one actin filament, and line A represents dynamic activity at the plus end…

A: CapZ proteins are not present.

Q: Briefly describe an in vitro experiment that differentiate between the Arp2/3 complex’ ability to…

A: Dear student as per multiple questions i can solve only first one due to the policy of Bartleby.…

Q: What is the bacterial toxin that prevents the docking of synaptic vesicles at the neuromuscular…

A: Acetylcholine is the principal neurotransmitter in the neuromuscular junctions. Clostridium…

Q: Even though the actual concentration inside a cell is above critical concentration, 50% of action is…

A: Actin participates in many important cellular processes, like muscle contraction, cell motility,…

Q: Explain how the thin and thick filaments interact in the sliding filament model.

A: Tendons attach skeletal muscles to the bone. Numerous bundles which make up the skeletal muscle are…

Q: Explain the Structures of activators?

A: Activator;- are modular proteins contains a single DNA binding domain  and one are few activation…

Q: What proteins are found in actin filaments?

A: In cell biology, cytoskeleton is a structural entity that provides shape to the cell and helps in…

Q: Discuss the following statement: “The basal lam-ina of muscle fibers serves as a molecular bulletin…

A: Muscle fibres are the contractile cells which are present in the muscles. These are responsible for…

Q: a) Why are muscles not in a contracted state all the time? b) Several hours after the death of an…

A: Muscles These are defined as the soft tissues that are involved in the movement of the body and in…

Q: Name and describe the function of the two regulatory proteins on the actin thin filament muscle.

A: Introduction There are various types of muscles are present in our body which perform various…

Q: 4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin…

A: Since two questions are asked in this section. It can be possible to answer one question in the…

Q: 18) in a sarcomere, which of the following is found in the light band? a) actin and myosin b) none…

A: The smallest functional unit in a striated muscle is a sarcomere. It is located between two Z-lines.…

Q: Intermediate filaments are distinct from microtubules in all of the following EXCEPT: intermediate…

A: The cytoskeleton of the cellcomposedosed of multiple fiber types which include actin filaments,…

Q: The following is FALSE about actin polymerization: a. F-actin with ADP bound is removed from the end…

A: Introduction:- The network of protein filaments inside the cytosol of eukaryotic cells is known as…

Q: What is responsible for the formation and stabilization of actin bundles and networks?

A: Actin is a protein that forms part of the cytoskeleton, a network of fibers that gives cells their…

Q: Skeletal muscle cells undergo contractions based on a molecular mechanism involving: 1)the sliding…

A: The skeletal muscle cells contract by using myosin and actin filaments. These cells are accountable…

Q: Regarding actin filaments, colchicine and taxol effects actin polymerization/depolymerization, what…

A: The Taxol and colchicine are used to treat cancer we known that, because they arrest dividing cells…

Q: The ability of myosin to walk along an actin filament may be observed with the aid of an…

A: Myosin is the motor protein, actin filaments are the tracks along which myosin moves, and ATP is the…

Q: Actin filaments at the leading edge of a crawling cell are believed to undergo treadmilling. What is…

A: The actin filament is the key component of muscle fiber along with myosin protein filament that is…

Q: Describe the mechanism by which a motor protein moves along microtubules using ONE  example. In your…

A: Motors proteins consists of two protein Kinesin and Dynein. Most important role is to transport of…

Q: Describe the structure of Intermediate filaments?

A: To describe: To describe the structure of Intermediate filaments and its functions