Select that statement that reflects evidence that directly supports the endosymbiotic theory. group of answer choices glycolysis occurs in the cytoplasm of bacterial cells. enzymes for photosynthesis are found embedded in membranes of the golgi apparatus. the electron transport system is located in the cell membrane in bacteria, while in eukaryotes it is located in the mitochondrial cristae. lysosomes contain their own dna in the form of plasmids.

The electron transport system is located in the cell membrane in bacteria, while in eukaryotes it is located in the mitochondrial cristae

Explanation:

Endosymbiosis is the hypothesis that complex organelles ( chloroplast and mitochondria)  within the cell came from other living organisms. That is, they originated because one cell ingested another cell. A proof of this is that these organelles have their own genome and their own transcription and translation  system. Their genome is independent of the  genome within the nucleus of the cell.

The genome of the mitochondria is specialized in the electron transport system. The ingestion of a cell (i.e. bacteria) with such genome could bring evolutionary advantages to the to the ingesting cell over other cells without the mitochondrial genome.

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.