That's not nessesarily true. There are organisms that have double stranded RNA genetic material.
"RNA is found in the cytoplasm"
There's also cytoplamic DNA, and this can be found in many bacteria or other prokaryotic organisms.
DNA can also be found in non-nucleic or non-mitochondrial places, such as in plasmids or free-flowing in virus or in the cytoplasm of prokaryotic organisms.
This is mostly correct, except for a few things:
RNA:
"They are single stranded molecules"
That's not nessesarily true. There are organisms that have double stranded RNA genetic material.
"RNA is found in the cytoplasm"
There's also cytoplamic DNA, and this can be found in many bacteria or other prokaryotic organisms.
DNA can also be found in non-nucleic or non-mitochondrial places, such as in plasmids or free-flowing in virus or in the cytoplasm of prokaryotic organisms.