At that time, why did it seem reasonable for the bases to be on the outside of the DNA molecule?

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

The body of water found at number 4 on the map above is the

What element is able to combine with itself and hydrogen to form large molecules ?