Human Health and Diseases

Cocaine is obtained from

Humoral immunity is mediated by which of the following ?

Assertion : Opioids are drugs derived from Papaver somniferum. Reason : Opioids slow down metabolism and produce hallucinations.

Assertion : Protooncogenes are present in normal cells. Reason : Protooncogenes may causes malignant tumour in animals, if activated.

Assertion : The principle of vaccination is based on the property of memory cells of the immune system. Reason: Vaccines generate memory B cells and T cells that recognise the pathogen quickly.

Humoral immunity in humans is due to

Which of the following antibiotics is not correctly matched with the source from which it is obtained?

Assertion : $\operatorname{IgM}$ is a type of immunoglobulin which cannot cross the placenta. Reason : IgM is pentamer immunoglobulin, joined by J-chain.

Assertion : Filarial worm is transmitted to humans by Culex mosquito. Reason: Culex prefers to breed in fresh water.

Which one of the following is not derived from plants?

Which of the following pathogens is not transmitted by a vector?

Assertion : AIDS and hepatitis B are sexually transmitted diseases. Reason: There is no permanent cure for both of them.