myosin
Protein
Yes. They speed up a reaction without being consumed in it.
The presence of catalysts, usually enzymes.
The proteolytic or protein eating enzyme of the stomach is called pepsin. Pepsin is secreted into the stomach as a zymogen (or inactive enzyme precursor) called pepsinogen which is converted into the active enzyme form by the hydrochloric acid and low pH in the gastric juices.
No, trypsinogen is a zymogen, an enzyme precursor, an inactive chemical produced by the pancreas. In the intestine, trypsinogen is activated by the mucosal enzyme enteropeptidease to produce the enzyme trypsin which is critical to digestion.
Myosin thick filaments
Yes, that is exactly what an enzyme is.
First of all 'catalist ' is spelled as 'CATALYST'. Note the 'Y' in place of 'i'. A protein that acts as an orgsanic catalyst is an ENZYME.
When a receptor protein acts as an enzyme, the receptor protein activates a second messenger that acts as a signal molecule within the cell. Resources: HOLT Biology Textbook - 9th grade edition Chapter 4, Cells and Their Environment.
All Enzyme are proteins enzymes act as catalyst
Enzyme
myosin cross-bridges
Enzyme - Logan
The carrier protein that transports hydrogen ions across thylakoid membranes and produce ATP acts as ion channel and an enzyme. The Krebs Cycle is a series of enzyme.
Protein
Yes. They speed up a reaction without being consumed in it.
Myosin acts with Actin during muscle contraction