Need with my review, will give brainliest to anyone who gives a decent explanation to their answer.

which statements best describe the second stage of cellular respiration? check all that apply.

the stage happens in the cytoplasm.
the stage happens in mitochondria.
oxygen combines with small molecules.
glucose is broken down.
energy is released.

The stage happens in mitochondria.

Energy is released.

Explanation:

The second stage of cellular respiration is the Krebs cycle

In the first stage of respiration, called glycolysis, a molecule of glucose is broken down into two molecules of pyruvate. Therefore the option "Glucose is broken down" is wrong, as this happens in the first stage

Prior to the beginning of the Krebs cycle, pyruvate is converted into Acetyl CoA, and then enters the Krebs cycle, where it undergoes a series of reactions (oxidation) to generate CO2, and the NAHD, FADH2, and ATP. Therefore, it is true that energy is released (in the form of ATP)

The Krebs cycle occurs in the mitochondria (not the cytoplasm, there is where oxidative phosphorylation occurs).

I would also say that oxygen combines with small molecules best describes oxidative phosphorylation (or the electron transport chain), where oxygen acts as the final electron acceptor, and is reduced to water.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

protistas excret ethanol used in the manufacture of vinegar