Mitochondria is a semi autonomous cell organelle, it is able to make its own protein because it has promiscuous DNA which has genes that have instructions to make proteins
False Primary Producers must form the largest base, because if there is a shortage of them, then there will be only a small amount for all others. This i guess can be called the Doppler's effect
('bit of history in here)
hope this helps
DNA helicases "unzip" the DNA molecule in preparation for replication; they break the hydrogen bonds between the two annealed nucleotide bases.