ELISA is used to detect viruses where the key reagent is:
Alkaline phosphatase is commonly used as an enzyme label in ELISA. It catalyzes a color-producing reaction when a specific antibody-antigen interaction is detected, allowing for the detection of viruses or other target substances in a sample.
So, the correct option is (A): Alkaline Phosphate

Study the chemical structure of an addictive drug shown below and answer the questions that follow.
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:
HIV is a virus that attacks cells that help the body to fight infection and making a person more vulnerable to other infections and diseases. It is spread by contact with certain bodily fluids of a person with HIV. It is most commonly during the unprotected sex or when share injection or drugs equipment.
It is the late stage of HIV infection that occurs when the body’s immune system is badly damaged because of the virus.