The term chemicals in this diagram represents A. Starch molecules
B. DNA molecules
C. Hormone molecules
D. Receptor molecules

Explain why phospholipid molecules form a bilayer. (3 marks)

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.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.