What is the effect of a nonsense mutation in a gene? what is the effect of a nonsense mutation in a gene? it introduces a premature stop codon into the mrna. it has no effect on the amino acid sequence of the encoded protein. it changes an amino acid in the encoded protein. it alters the reading frame of the mrna. it prevents introns from being excised?

Need ! will give 20 points! what are two ways that diatoms differ from slime molds? the external coverings of diatoms are made up of (silica, chitin or peptidoglycan), while slime molds have cell walls containing (silica, peptidoglycan or chitin). diatoms are (chemoheterotrophs, photoautotrophs or chemoautotrophs) because they make food through photosynthesis, while slime molds are (heterotrophs, phototrophs or autotrophs) because they eat decaying plant matter.