Question

________ allowed for the detection of a 3.4 angstroms (Å) specific periodicity and helical structure

A) X-ray crystallography
B) NMR spectroscopy
C) Mass spectrometry
D) Electron microscopy

Answer 1

X-ray crystallography is the technique that allows for the detection of a 3.4 angstroms (Å) specific periodicity and helical structure.

Step-by-step explanation:

The technique that allows for the detection of a 3.4 angstroms (Å) specific periodicity and helical structure is X-ray crystallography. X-ray crystallography is a method used to determine the arrangement of atoms in a crystal by measuring the diffraction of X-rays. In the case of the 3.4 angstroms periodicity and helical structure, X-ray crystallography provides the information needed to identify the specific arrangement of atoms in the crystal.