At which organelle are proteins assembled?

a. ribosome
b. chloroplast
c. nucleus
d. cytoskeleton

i think it is dna, i'm not totally sure but i think it might be.

the answer is b.) hydrogen bonds between bases.

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.