The scientist(s) who discovered that bacteria can transfer genetic information was/were
DNA genetic coding and cell regulation is now understood to be incredibly important to every cell among organisms, and is also associated with viruses. Through the early and mid-1900s, scientists developed new molecular analysis methods that changed the foundations of how we understand "life" to function. Normal health and homeostasis, as well as disease, and natural variations in form and function among organisms are now better understood. Medical and biological applications have increased dramatically with the understanding of DNA molecule structure, and it is helpful to have recognition of the scientists and sequence of events contributing to our understanding.
A. Griffith.
B. Watson and Crick.
C. Chargaff.
D. Wilkins and Franklin.
E. Hershey and Chase.
A. Griffith.
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Infectious processes that quickly develop are referred to as _________ infections
a. chronic b. latent c. acute d. nosocomial
T cell response to T-dependent antigens requires
A. binding of the T cell to a class II MHC receptor on a macrophage. B. typically a protein antigen. C. binding of the T cell to a site on the antigen. D. interleukin-1 activating the T helper cell. E. All of the choices are correct.
Which of the following statements about the nitrogen cycle is true?
A) The nitrogen cycle requires different types of bacteria. B) Nitrogen gas is converted to nitrates in plant leaves. C) Nitrogen cannot be cycled through living organisms. D) When plants and animals die, nitrogen is removed from the nitrogen cycle
The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different
A) amino groups. B) side chains (R groups). C) tertiary structure. D) carboxyl groups. E) Both A and B are correct.