Question
Consider the following statements $A$ to $B$ and identify the correct answer
A.Polarised light can be used to study the helical surface of nucleic acids.
B.Optics axis is a direction and not any particular line in the crystal
✓
Answer
(a) Nucleic acid is an optically active medium. When circularly polarized light passes through an absorbing optically active medium, the speeds between right and left polarizations differ as well as their wavelengths. This can be used to study the helical structure of nucleic acids.
An optical axis is a line along which there is some degree of rotational symmetry in an optical system. Thus it is a particular direction and not any random line.
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