In protein synthesis, there are specific codons of base triplets that initiate or terminate protein synthesis. Which of the following is the codon that signals RNA to begin protein synthesis? A. UAA
B. AUG
C. UGA
D. AGU

the answer is otpion c) understanding

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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.