Why do cells need both trna and mrna?

only mrna can be used to repair mistakes in the dna sequence.
only trna bends into a shape that can carry specific amino acids.
the trna in used on the ribosomes and the mrna is used in the nucleus.

the mrna brings information to the nucleus for the trna to use.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.