Neurosis is characterised by
Madness
Prolonged emotional reaction to a stress
Pain in the head
Fits of convulsions
In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions.
$(a)$ Fill in $(A)$ and $(B)$
$(b)$ Why is the virus called retrovirus ?
$(c)$ Can the infected cell survive while viruses are being replicated and released ?
Which one of the following is a stimulant
Read the following sentences and choose correct sentences
$1.$ Dysentery, plague, diphtheria are caused by bacteria
$2.$ Salmonella typhi directly affect the respiratory system
$3.$ Amoebiasis and Ascariasis are caused by contaminated water
$4.$ Internal bleeding, anemia muscular pain are symptoms of elephantiasis
The drug 'cyclosporin' used for organ transplant patients is obtained from a
Discuss with your teacher what does 'a suitable gene' means, in the context of $DNA$ vaccines.