Given below are two statements:

Statement I : Very low concentration of a bacteria or virus (at a time when the symptoms of the disease are not yet visible) can be detected by amplification of their nucleic acid by PCR.

Statement II : PCR is used to detect the antibodies of HIV.

In the light of the above statements, choose the correct answer from the options given below.

Statement I is true but Statement II is false.

Statement I is true. PCR (Polymerase Chain Reaction) is a sensitive technique used to amplify small amounts of nucleic acids, such as DNA or RNA, including those from bacteria or viruses. It can detect the presence of pathogens even when symptoms of the disease are not yet visible.

Statement II is false. PCR is not used to detect antibodies. Instead, it is used to detect the presence of the nucleic acid (RNA) of the virus itself. HIV antibodies are typically detected using techniques such as ELISA (Enzyme-Linked Immunosorbent Assay) or Western blot.