Ribosomes are much smaller than mitochondria. Moreover, mitochondria have a lot of ribosomes inside that they use to make their own proteins. https://en.wikiped

Ribosomes are much smaller than mitochondria. Moreover, mitochondria have a lot of ribosomes inside that they use to make their own proteins. https://en.wikipedia.org/wiki/Mitochondrial_ribosome https://en.wikipedia.org/wiki/Mitochondrial_ribosome > Are ribosomes alive as well? Nah [1]. They do single task. They just read RNA, pick amino acids [1] and make proteins. If a cell were your house, it's like a 3D printer. Mitochondria are much bigger, they have their own DNA, they reproduce, have a lot of internal structure, they do all the task of a normal cell. If a cell were your house, it's like having a bunch of squirrels trained to wind the clocks in exchange for peanuts. [1] The definition of alive is complicated, so I prefer a "Nah" instead of a super hard "No". [2] There are some details I'm hiding, like mRNA, tRNA and even rRNA.