Which of the following is the si unit for length? a. gram c. meter b. liter d. kelvin

Nucleic acid certain protein cell membranes certain carbohydrates

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.

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?