chemical reactions take place in the membrane
Stomach
In the thylakoid membrane in chloroplasts.
In the protoplasm
it provides energy for some reactions to take place.
In the cytoplasm, the chemical reactions of the cell take place.
Light-dependent reactions in photosynthesis take place in the thylakoid membrane of chloroplasts. This membrane contains pigments such as chlorophyll that absorb light energy and convert it into chemical energy in the form of ATP and NADPH.
Chemical reactions in the body take place in water.
Chemical reactions in the body take place in water.
Heat helps chemical reactions to take place. Light can also cause some chemical reactions to take place.
Stomach
gas
Most of the body's chemical reactions take place within cells, specifically within organelles such as the mitochondria, where cellular respiration occurs, and the cytoplasm, where various metabolic processes take place. Enzymes play a crucial role in catalyzing these chemical reactions and maintaining the body's overall homeostasis.
In the thylakoid membrane in chloroplasts.
gas
Integral Membrane Proteins control the movement of substances into and out of the Cell (that cannot pass directly through the bi-lipid layer). These are proteins that span the width of the membrane [40 nanometers], and can be channels, pumps, gates of many descriptions, co-transporters, etc. As proteins go, these trans-membrane proteins have internal and external hydrophyllic lengths that have immensely important and varied bio-functions, and the trans-membrane segment is of course hydrophobic.
Most chemical reactions within cells could not take place without water
At equilibrium, the rates of the forward and reverse reactions are equal, but chemical reactions are still occurring.