Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
When plants/animals are infected with virus, they may produce an anti-viral substance that is capable of inhibiting the multiplication of that virus. Identify the correct name of this substance.
(d): Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection.
Which of the following factor is incorrect for the low levels of immune response during Plasmodium infection?
(d) The Plasmodium infects the phagocytic cells of the body and destroys them. This leads to a rapid decline in the immune response generated against this pathogen.
A drug addict showed symptoms such as increased appetite, chest pain, redness of eyes, increased urination. He was possibly taking
The drug addict was possibly taking cannabis compounds. The receptors for these are mainly present in brain. These are obtained from dried leaves and flowers of the hemp plants, (cannabis sp.) Regular use causes addiction.
The disease caused by Leishmania and transmitted by Phlebotomus is
Kala-azar is caused by protozoan Leishmania donovani. It attacks the liver, lymph glands and leucocytes of man, dog and cat and is transmitted by sandfly, phlebotomus sp.
Which type of immunoglobulin is/are abundantly found in foetus?
(b) lgG immunoglobulin only posses the capability to cross the placenta and is found in foetus.
Typhoid fever is caused by a species of
Typhoid fever is caused by species of Salmonella typhi.
HIV is a member of a group of viruses called
HIV is a member of viruses called retroviruses. It contain ssRNA when it infects the host cell ssRNA is transcribed into cDNA and integrate into DNA.
Humoral immunity system is mediated by
(a) Humoral immunity system is mediated by B-cells. T-cells and natural killer cells are involved in cell medicated immunity.
The type of immunoglobulin present in the foetus are
(c) IgG can only cross the placenta.
Leukaemia is caused by
(b) In human, most of the strontium becomes concentrated in bones, which damage bone cells and marrow blood cells.
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