A) inherited metabolic disorders in humans are associated with missing enzymes.
B) substances in cells could transform bacteria from nonvirulence to virulence.
C) proteins are made up of amino acids.
D) the substance that transmits traits is in the cell nucleus.
E) X-ray diffraction reveals that DNA is a highly symmetrical molecule.

A) Gregor Mendel.
B) Frederick Griffith.
C) Alfred Hershey and Martha Chase.
D) Erwin Chargaff and Phoebus Levene.
E) Rosalind Franklin.

A) poodles in microwave ovens.
B) hamsters and a blender.
C) frogs and a dishwasher.
D) viruses and a blender.
E) X-rays and models.