Psychic stimulants include caffeine, cocaine, and various amphetamines. These drugs are used to enhance mental alertness and reduce drowsiness and fatigue.
Changes in the dna are called mutations. They can occur spontaneously. Mutations can only be passed down in gametes--sperm and egg cells. with Darwins theory at mind a mutation needs to pass the test of natural selection to remain in the gene pool. So purposly making mutation or altercations may end in diseases/illnesses or in some cases death because they body can not take it.....hope this helps if it doesnt im sorry!
The three<span> roles of </span>RNA<span> in </span>protein<span> synthesis. Messenger </span>RNA<span> (mRNA) is </span>translated<span>into </span>protein<span> by the joint action of transfer </span>RNA<span> (tRNA) and the ribosome, which is composed of numerous </span>proteins<span> and two major ribosomal </span>RNA<span> (rRNA) molecules. ... Ribosomal </span>RNA<span> (rRNA) associates with a set of </span>proteins<span> to form ribosomes.</span>
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i made a video on what i think you are talkig about a bit ago. im like 99% sure its the same thing. here is the link, h tt ps:/ /tiny url . c o m / e 6 j 6 c 8 w
