Bacteria perform each of the following ecological roles. Which role typically does not involve symbiosis? Bacteria perform each of the following ecological roles. Which role typically does not involve symbiosis? aggregator with methane-consuming archaea gut mutualist skin commensalist decomposer

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

not always but somethings can be reproduced in a laboratory.

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.