As Aprt of in Vetro Experiment, the Physiologist Injet Radiolabeled

question 321

Multiple Choice

As aprt of in vetro experiment, the physiologist injet radiolabeled ATP into skeletal muscle. If the labeled ATP is observed to attach to the sacromere during muscle contraction. What does this attachement casue immediately?

• A)Calcium binding to troponin C
• B)Tropomyosin displacement from the groove on the actin molecule
• C)Myosin head detachment from the actin filament
• D)Cross-bridge formation
• E)Myosin light chain phosphorylation by a specific enzyme

---

Definitions:

H-Bonds

Hydrogen bonds, a type of weak chemical bond that occurs when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom.

Peptide Backbone

The main structural component of a peptide, consisting of a repeated sequence of amino acids linked by peptide bonds.

Equilibrium

Equilibrium is a condition in a chemical reaction when the rate of the forward reaction equals the rate of the reverse reaction, leading to a constant concentration of reactants and products.

Tautomers

Isomers of organic compounds that differ in the position of protons and electrons but have the same molecular formula, often interconverting in a chemical equilibrium.