Gene activation is one of the ways hormones exert their functions. And this require a second messenger system.
Usually, the hormone:
- binds to a specific receptor protein on the target cell
- the bound-complex causes the formation of second messengers such as cAMP (a cyclic nucleotide) that diffuses into the nucleus and binds directly with DNA, ACTIVATING GENE and switching "on" or "off" protein synthesis.
Answer: Metamorphic rock occurs when you take any other type of rock and put them under and , and they twist and meld together. ... If any type of rock experiences intense heat and pressure, it changes into rock.