chemical reactions take place in the membrane
cytoplaysm
Cristae
Stomach
Thousands of chemical reactions take place in an organism.
In the thylakoid membrane in chloroplasts.
cytoplasm
They take place in a cell
Cristae
Chemical reactions in the body take place in water.
Chemical reactions in the body take place in water.
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.
Heat helps chemical reactions to take place. Light can also cause some chemical reactions to take place.
Thylakoid membrane on the chloroplast.
Most chemical reactions take place in the cytoplasm.
gas
Stomach
Thousands of chemical reactions take place in an organism.
In the thylakoid membrane in chloroplasts.