Laurel uses the parts of a city to represent the different organelles. which part of a city is the best comparison for mitochondria

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.