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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.
An autoimmune disease is
(c) It is a chronic progressive weakness of voluntary muscles especially that of eyes and
face.
Monoclonal antibodies are
(c) Monoclonal antibodies are identical molecules specific for one type of antigen. These are obtained by injecting the target antigen into a rat or mouse. Sometimes later, the spleen cells producing antibodies are isolated and fused with myeloma cells to produce monoclonal antibodies.
During an allergic reaction, the binding of antigens to IgE antibodies initiates a response, in which chemicals cause the dilation of blood vessels and a host of other physiological changes, such chemicals are
Histamine is released during allergic reactions. Histamine can occur in various tissues bit it is concentrated in connective tissue, it is formed from the amino acid histidine. It causes dilation and increases permeability of small blood vessels, which results in such symptoms as localise swelling, itching, sneezing and runny eyes and nose.
Which of the following phenomena could NOT be explained by Bohr's model of the atom?
The NCERT text states: 'Bohr’s model was also unable to explain the splitting of spectral lines in the presence of magnetic field (Zeeman effect) or an electric field (Stark effect).' Options 1, 2, and 4 are phenomena that Bohr's model successfully explained for hydrogenic atoms.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.