Durante la expresión génica, el adn se transcribe en arn en el núcleo. luego, el arn se traduce en proteínas en el citoplasma. ¿a través de qué barrera física debe pasar el arn cuando pasa del núcleo al citoplasma?

Transcription is the process in which the DNA sequence of a gene is copied (transcribed) to make an RNA molecule.
RNA polymerase is the main transcription enzyme.
Transcription begins when RNA polymerase binds to a sequence called a promoter near the start of a gene (directly or through auxiliary proteins).
RNA polymerase uses one of the DNA strands (the strand or template strand) as a template to make a new complementary RNA molecule.
The transcript ends in a process called termination. The termination depends on sequences in the RNA that signal the end of transcription.

Hmm this is a hard heterotroph's can't produce its own food. a human can produce it's own food because people kill animals and eat them like squirrel, deer, oak trees need rain which they don't produce the rain, bee's need flowers and pollen and nectar but they don't produce it either, rabbit's don't produce either, because they either steal carrots from your garden and eat leaves.so, the best answer that i would pick is a. humanshope my answer has you and sorry if it doesn't : ) : (